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1
Zhukov, Victor P. "Verification, Validation, and Testing of Kinetic Mechanisms of Hydrogen Combustion in Fluid-Dynamic Computations." ISRN Mechanical Engineering 2012 (August 13, 2012): 1–11. http://dx.doi.org/10.5402/2012/475607.
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A one-step, a two-step, an abridged, a skeletal, and four detailed kinetic schemes of hydrogen oxidation have been tested. A new skeletal kinetic scheme of hydrogen oxidation has been developed. The CFD calculations were carried out using ANSYS CFX software. Ignition delay times and speeds of flames were derived from the computational results. The computational data obtained using ANSYS CFX and CHEMKIN, and experimental data were compared. The precision, reliability, and range of validity of the kinetic schemes in CFD simulations were estimated. The impact of kinetic scheme on the results of computations was discussed. The relationship between grid spacing, time step, accuracy, and computational cost was analyzed.
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Tharehalli Mata, Gurubasavaraju, Hemantha Kumar, and Arun Mahalingam. "Performance analysis of a semi-active suspension system using coupled CFD-FEA based non-parametric modeling of low capacity shear mode monotube MR damper." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 5 (2018): 1214–31. http://dx.doi.org/10.1177/0954407018765899.
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In this work, an approach for formulation of a non-parametric-based polynomial representative model of magnetorheological damper through coupled computational fluid dynamics and finite element analysis is presented. Using this, the performance of a quarter car suspension subjected to random road excitation is estimated. Initially, prepared MR fluid is characterized to obtain a relationship between the field-dependent shear stress and magnetic flux density. The amount of magnetic flux induced in the shear gap of magnetorheological damper is computed using finite element analysis. The computed magnetic field is used in the computational fluid dynamic analysis to calculate the maximum force induced under specified frequency, displacement and applied current using ANSYS CFX software. Experiments have been conducted to verify the credibility of the results obtained from computational analysis, and a comparative study has been made. From the comparison, it was found that a good agreement exists between experimental and computed results. Furthermore, the influence of fluid flow gap length and frequency on the induced force of the damper is investigated using the computational methods (finite element analysis and computational fluid dynamic) for various values. This proposed approach would serve in the preliminary design for estimation of magnetorheological damper dynamic performance in semi-active suspensions computationally prior to experimental analysis.
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Jones, Thomas David Arthur, Richard I. Strachan, David M. Mackie, Mervyn Cooper, Brian Frame, and Jan B. Vorstius. "Optimising Computational Fluid Dynamic Conditions for Simulating Copper Vertical Casting." Materials Science Forum 1016 (January 2021): 642–47. http://dx.doi.org/10.4028/www.scientific.net/msf.1016.642.
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A 2-D finite volume Computational Fluid Dynamic (CFD) model, using Ansys Fluent vR.1 of a vertically oriented upwards continuous casting (VUCC), was investigated for 8 mm, oxygen free copper (OFCu). The simulations enabled the mapping of the cast OFCu solidification front (SF) interface from liquid to solid. Optimisation of the simulation parameters were investigated which included mesh size and the Ansys specific ‘mushy zone’ constant (Amush), which is used to account for fluid flow dampening at SF within the model. Observations of the SF, the change in fluid volume in the die, the simulation convergence and the total simulation time, revealed that the optimised casting parameters were for mesh size 1×10-4 m and Amush 106 kg/m3s. These parameters were compared with the cast rod and highlighted qualitatively the relationship between grain growth direction and SF position during a casting pulse cycle.
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De Alwis, V. A. U., A. P. K. De Silva, S. D. G. S. P. Gunawardane, and Young-Ho Lee. "Computational fluid dynamic simulation of hull reservoir wave energy device." Journal of Physics: Conference Series 2217, no. 1 (2022): 012041. http://dx.doi.org/10.1088/1742-6596/2217/1/012041.
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Abstract This paper presents a Computational Fluid Dynamics (CFD) analysis of a wave energy device called the Hull Reservoir Wave Energy Converter (HRWEC). The device consists of a floating hull and a flap connected to the shaft of power take-off system (PTO), which is integral to the hull structure. It is unique due to its ability to convert wave energy by utilizing the pitch motion of the hull and rotating flap due to the internal water movement in the hull. Due to the complexity of the internal fluid dynamics, a CFD-based analysis was considered most appropriate. The CFD investigation of the dynamics of the device was done under regular wave conditions by using the ANSYS-AQWA and ANSYS FLUENT. Relative pitch angle variation, the hydrodynamic coefficients, which determine the degree of power extraction, were obtained from simulated results. A simulation was designed exhibiting complete system dynamics for different configurations varying on internal water height. Excellent convergence was observed, and an optimum configuration was identified. It is expected to validate the simulation results through experiments in the foreseeable future.
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Santosh, Kumar Singh* Dr.Prabhat Kumar Sinha. "ANALYSIS OF MICRO NEEDLE MATERIAL BY ANSYS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 5 (2017): 462–70. https://doi.org/10.5281/zenodo.573550.
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Present research focus on design and analysis of silicon and stainless steel based hollow micro-needles for transdermal drug delivery (TDD) has been presented. By using ANSYS &CFD (computational fluid dynamic), structural and micro fluidic analysis has been performed to ensure that the micro-needles design suitability for Drug delivery. The effect of axial and transverse load on single and micro-needle array has been investigated & the mechanical properties of micro-needle. The analysis predicts that the resultant stresses due to applied bending and axial loads are in the safe & comfort desired range. In computational fluid dynamic (CFD) static analysis, the fluid flow rate through micro-needle array was investigated by applying the pressure in the inlet the micro-needles were capable for flow of drug up to the desired range. Towards achieving painless injections and other micro fluidic applications, the work was focused on the conically tapered hollow needles of micron dimensions. The relationship between pressure drop and flow rate through micro-needles was analyzed quantified as a function of fluid viscosity, micro-needle length, diameter and cone half-angle. The dimensionless pressure drop sharply decreased as the indicating role of viscous forces on the boundaries of the micro-needles increased. The flow was almost in viscid, indicates that the effect of pressure drop, numerical simulations showed that the flow through conically tapered micro-needles was mainly controlled by the diameter and taper angle of the micro-needle tip. The hollow out-of-plane micro-needle of micron sized devices for drug delivery applications was investigated.
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FETISOV, A. S., and A. V. KORNAEV. "JOURNAL BEARING WITH VARIABLE DYNAMIC CHARACTERISTICS: SIMULATION RESULTS AND VERIFICATION." Fundamental and Applied Problems of Engineering and Technology 2 (2021): 140–45. http://dx.doi.org/10.33979/2073-7408-2021-346-2-140-145.
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The article presents the results of a computational experiment on modeling a smooth plain bearing with a controlled axial supply of lubricant. The basic relations of the mathematical model, boundary conditions and parameters of modeling the fluid flow in the gap region of the sliding support are presented. The description of the calculation of the sliding support in the Ansys software package is given. The results of modeling and the results of calculating the static and dynamic parameters of the simulated bearing are presented. Conclusions are drawn on the applicability of computational fluid dynamics programs for calculating sliding supports
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Santosh, Kumar Singh* Prabhat Sinha N.N. Singh Nagendra Kumar. "STUDY & ANALYSIS OF MICRO NEEDLE MATERIAL BY ANSYS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 4 (2017): 168–79. https://doi.org/10.5281/zenodo.496122.
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In this research the concept of design and analysis, silicon and stainless steel based on hollow micro-needles for transdermal drug delivery(TDD) have been evaluated by Using ANSYS & computational fluid dynamic (CFD), structural. Micro fluidic analysis has performed to ensure the micro-needles design suitability for Drug delivery. The effect of axial and transverse load on single and micro-needle array has investigated with the mechanical properties of micro-needle. The analysis predicted that the resultant stresses due to applied bending and axial loads were in the desired range. In computational fluid dynamic (CFD) static analysis, the fluid flow rate through micro-needle array has investigated by applying the pressure the inlet to ensure that the micro-needles were capable for flow of drug up to the desired range. Towards achieving painless injections and other micro fluidic applications, the main aim to focus on the conically tapered hollow needles of micron dimensions. The relationship between pressure drop and flow rate through micro-needles was experimentally quantified as a function of fluid viscosity, micro-needle length, diameter, and cone half-angle. The dimensionless pressure drop sharply decreased as increased the indicating role of viscous forces on the boundaries of the micro-needles. The flow was in viscid, indicates that the effect of pressure drop, numerical simulations shows that the flow through conically tapered micro-needles was mainly controlled by the diameter with taper angle of the micro-needle tip. In this research the hollow out-of-plane micro-needle of micron sized devices for drug delivery applications were obtained.
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Tesfaye, Barza Zema, and Dejene Mesay. "DESIGN AND SIMULATION OF SHELL-AND-TUBE HEAT EXCHANGER (STHE) WITH THE EFFECT OF BAFFLES USING CFD-TOOL." Engineering and Technology Journal 8, no. 05 (2023): 2171–75. https://doi.org/10.5281/zenodo.7899812.
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In the current scenario, heat exchangers are used in the thermal system to maintain the working liquid's temperature. Due to their robust design and performance characteristics, the Shell and Tube Heat Exchangers (STHE) are mainly used in the generation of electricity, the cooling of hydraulic fluid, transmissions, and hydraulic power packs. This can further be improved to achieve a higher heat transfer rate. It consists of a casing with several tubes inside. The project’s ideology is based on the use of baffles attached to the heat exchanger to increase the flow rate of highly viscous fluids. The paper’s intended result is to determine the rate of heat transfer using hot water as the hot liquid. The theoretical analysis results obtained in this study were reasonably predicted by computational fluid dynamic (CFD) under Ansys Cfx. The simulation consists of modeling, meshing cross-sectioning, and the fluid behavior in the shell and tube of STHE are used in Ansys fluent 16.0. Finally, the effectiveness of the design parameters and contour conditions published under Ansys Cfx.
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Khan, Sabuddin, H. C. Thakur, and Nazeem Khan. "A Computational Fluid Dynamic Study of Shell and Tube Heat Exchanger Using (CuO, Al2O3, TiO2)-Water Nanofluids." Advanced Science, Engineering and Medicine 12, no. 12 (2020): 1462–67. http://dx.doi.org/10.1166/asem.2020.2585.
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The Nusselt number for a Shell and tube Heat Exchanger with segmental baffles for different nanofluids, for different mass flow rate are discussed in the present paper. A shell and tube heat exchanger with 7 tubes and 4 segmental baffles modelling is done using SOLIDWORKS and simulation is done by the Computational Fluid Dynamic (CFD) software; ANSYS-FLUENT. By using Fluent, computational fluid dynamics software the heat transfer coefficient and various heat characteristics of Al2O3–H2O, TiO2–H2O and CuO–H2O for 1% volume of concentration nanofluids are estimated in the Shell and Tube Heat Exchanger considering the turbulent flow.
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Rashia Begum, S., and G. Arumaikkannu. "Computational Fluid Dynamic Analysis of Customised Tibia Bone Scaffold." Applied Mechanics and Materials 330 (June 2013): 698–702. http://dx.doi.org/10.4028/www.scientific.net/amm.330.698.
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The function of Tissue Engineering Bone Scaffold lies in Mechanical and Fluid dynamic behaviour to mimic the exact bone tissue. The fluid dynamic characteristic in a porous scaffold plays a vital role for cell viability and tissue regeneration. The Wall Shear Stress of fluid in a porous scaffold gives the cell proliferation. This paper presents, the patients CT scan data in DICOM format is exported into MIMICS software to convert the 2D images into 3D IGES data. The customised bone scaffolds with pore size of 0.6mm in diameter and distance between adjacent edges of pores from 0.6mm to 1mm are created in modeling software (SOLIDWORKS 2011) and porosities of five customised bone scaffolds are determined. The above customised bone scaffolds are analysed in CFD software (ANSYS CFX) for the fluid density 1000 kg/m3 and viscosity 8.2 ×10-4 kgm-1 s-1. The estimated Wall Shear Stress (WSS) at fluid velocities from 0.2mm/s to 1mm/s lies in the range of 9.54 x 10 -4 Pa to 38.3 x 10 -4 Pa.
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Senthil Kumar, R., N. Puja Priyadharshini, and Elumalai Natarajan. "Experimental and Computational Fluid Dynamics (CFD) Study of Glazed Three Dimensional PV/T Solar Panel with Air Cooling." Applied Mechanics and Materials 787 (August 2015): 102–6. http://dx.doi.org/10.4028/www.scientific.net/amm.787.102.
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The thermal performances of photovoltaic thermal (PV/T) flat plate panel were determined under 500–1000 W/m2 solar radiation levels. In the present work, fluid flow analysis and temperature distribution on solar panel has been carried out by experimental method and computational fluid dynamic (CFD) technique. The experiments have been carried out on clear days during the month April 2014. The geometric model for CFD analysis is generated using Solidworks. Mesh generation is accomplished by ANSYS Meshing Software. Physics setup, computation and post processing are accomplished by ANSYS FLUENT. The experimentally measured temperatures are compared to the temperatures determined by the CFD model and found to be in good agreement. It is also found that the difference between the experimental and CFD simulated outlet temperature differ only by less than 3.5°C.
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Zau Beu, Maria Margareta. "Computational Fluid Dynamic for Performance Hydrofoil due to Angle of Attack." Journal of Earth and Marine Technology (JEMT) 1, no. 1 (2020): 12–19. http://dx.doi.org/10.31284/j.jemt.2020.v1i1.1146.
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This study uses a 2-D computational fluid dynamic (CFD) with a hydrofoil object. The general parameters used are pressure-based with Reynold numbers (Re) 106. The Pressure velocity coupling method used is SIMPLE with Reynold k-? as the viscous model on ANSYS Fluent 2019R1. The angle of attack variations are used starting from 00, 20, 40, 60, 10, 120, 150, 200, 250, and 300. From the simulation shows the hydrofoil characters depicted in the Coefficient drag (CD), Coefficient Lift (CL) and Pressure graphs Coefficient (CP) approaches the experimental results.
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Dzulfikar, Muhammad, Helmy Purwanto, Muhammad Abdul Wahid, and Salim Rahmatulloh. "GAYA ANGKAT DAN GAYA HAMBAT SAYAP PUNA MODEL NACA 0015 MENGGUNAKAN SIMULASI ANSYS FLUENT." Jurnal Rekayasa Mesin 15, no. 3 (2024): 1451–62. https://doi.org/10.21776/jrm.v15i3.1707.
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The hi-speed computational using simulation software has emerged for the calculation of force dynamic. Albeit the significant progress in the computational method, the aerodynamic of flying wing are somewhat elusive. Herein, we performed a detailed computation of the lift and drag behaviors of NACA-0015 flying wing modelled through the surveillance speeds and difference angle of attack using Ansys. This study aims to determine and analyze the maximum angle of attack, lift force and drag force at speeds of 10 m/s, 30 m/s, and 50 m/s. The method used is analysis using CFD (Computational Fluid Dynamic) simulation software. The simulation uses Ansys Fluent to determine the aerodynamic characteristics, after varying the angle of attack at a predetermined speed on an airplane (unmanned aerial vehicle) wing with a NACA 0015 airfoil. The results of the research that has been carried out are the maximum angle of attack at a predetermined speed variation (Re = 0.2 x 105 to 1.0 x 105), namely 25° at each angle of attack, with details of a speed of 50 m/s getting the highest lifting force, around 38,72 N and drag force in the area 6,49 N.
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A, Gokul karthik, Aravindhan T.K., Girithararajan P., and Jatin R. "Design and Optimization of a Duct in Different Working Conditions for Circular and Elliptical Section." Journal of Industrial Mechanics 4, no. 1 (2019): 20–24. https://doi.org/10.5281/zenodo.2637425.
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The objective is to evaluate and compare the computational fluid dynamic analysis of duct under three types of working conditions namely home, industry and restaurant. In this, a fluent analysis is conducted on elliptical and circular cross section duct to obtain the variation of velocity and pressure magnitude at critical locations of duct. The computational fluid dynamic analysis is done and verified by simulations in ANSYS workbench. Results achieved from a mentioned analysis were used in optimization of the duct used for various applications like home, industry and restaurant. Geometry is analyzed for different working conditions under different velocity inputs
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Pajcin, Miroslav, Aleksandar Simonovic, Toni Ivanov, Dragan Komarov, and Slobodan Stupar. "Numerical analysis of a hypersonic turbulent and laminar flow using a commercial CFD solver." Thermal Science 21, suppl. 3 (2017): 795–807. http://dx.doi.org/10.2298/tsci160518198p.
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Computational fluid dynamics computations for two hypersonic flow cases using the commercial ANSYS FLUENT 16.2 CFD software were done. In this paper, an internal and external hypersonic flow cases were considered and analysis of the hypersonic flow using different turbulence viscosity models available in ANSYS FLUENT 16.2 as well as the laminar viscosity model were done. The obtained results were after compared and commented upon.
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Alshroof, Osama N., Gareth L. Forbes, Nader Sawalhi, Robert B. Randall, and Guan H. Yeoh. "Computational Fluid Dynamic Analysis of a Vibrating Turbine Blade." International Journal of Rotating Machinery 2012 (2012): 1–15. http://dx.doi.org/10.1155/2012/246031.
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This study presents the numerical fluid-structure interaction (FSI) modelling of a vibrating turbine blade using the commercial software ANSYS-12.1. The study has two major aims: (i) discussion of the current state of the art of modelling FSI in gas turbine engines and (ii) development of a “tuned” one-way FSI model of a vibrating turbine blade to investigate the correlation between the pressure at the turbine casing surface and the vibrating blade motion. Firstly, the feasibility of the complete FSI coupled two-way, three-dimensional modelling of a turbine blade undergoing vibration using current commercial software is discussed. Various modelling simplifications, which reduce the full coupling between the fluid and structural domains, are then presented. The one-way FSI model of the vibrating turbine blade is introduced, which has the computational efficiency of a moving boundary CFD model. This one-way FSI model includes the corrected motion of the vibrating turbine blade under given engine flow conditions. This one-way FSI model is used to interrogate the pressure around a vibrating gas turbine blade. The results obtained show that the pressure distribution at the casing surface does not differ significantly, in its general form, from the pressure at the vibrating rotor blade tip.
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Munteanu, Laurenţiu, Marius Cornel Şuvar, and Ligia Ioana Tuhuţ. "Optimizing the computational simulations of air-flammable gas explosions using HPC and Ansys software." MATEC Web of Conferences 305 (2020): 00052. http://dx.doi.org/10.1051/matecconf/202030500052.
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The purpose of this scientific work is to improve computer simulations of flammable air-gas explosions with HPC systems. Computational Fluid Dynamics (CFD) is increasingly used for obtaining variable values of fluid flow areas, respectively for the manner in which fluids react with limited surfaces. For a separate analysis of liquids and gases is used CFD, and for more realistic results is used the multi-phase method performed by ANSYS Fluent, which improves the calculation scalability and power. For increasing the processing speed for complex analyses, with multiple geometries and fine meshes, ANSYS provides the user HPC (High Performance Computing) tools applicable for structural, thermal, electromagnetic, fluid dynamics and explicit dynamics solvers. HPC configuration is characterized by a good scalability, having the capacity for future extension of cores or processors. For decreasing the computational simulation time for explosions, the proposed solution consists in running complex simulations on the servers of a HPC cluster. In this way is provided the possibility for a parallel or distributed running on one or several calculation systems. Using HPC along ANSYS applications may be activated by GPU acceleration, while other applications are limited to processing using CPUs. INSEMEX develops technical investigations of explosions and fires occurred in the industrial or civilian field, in compliance with Government Decision 1461/2006, based on the verification of scenarios using virtual computational simulations.
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Dumitrache, C. L., B. Hnatiuc, and D. Deleanu. "Exhaust Gas Recirculation (EGR) valve, design and computational fluid dynamic analysis." IOP Conference Series: Materials Science and Engineering 1182, no. 1 (2021): 012022. http://dx.doi.org/10.1088/1757-899x/1182/1/012022.
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Abstract All EGR systems used on contemporary cars operate on the principle of “external” exhaust gas recirculation. A certain proportion of the engine exhaust gases is extracted and transmitted back into the fresh air-gasoline mixture by means of a control valve. Exhaust gas recirculation valve is generally controlled by a pneumatic or mechanical system designed to dose the exhaust gases in accordance with certain factors such as: engine speed; intake manifold pressure; engine temperature. This paper presents the design steps of the EGR valve using NX SIEMENS. After making the 3D model, it was imported into ANSYS where a study of the flow of fluids (flue gases CO2 and liquid coolant) was made. In this study it was considered that the valve was actuated and the exhaust gases enter the engine while they are also cooled by the liquid coolant. From the fluid flow modeling process it can be seen that the coolant does not take much of the flue gas temperature, its role being more to maintain a proper temperature of the body valve.
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Li, Cheng Wu, Wei Yang, Bei Jing Xie, Xu Cao, and Guo Dong Mei. "Numerical Simulation on Hazardous Area Distribution after Gas Outburst in Coal Uncovering Construction of Hydropower Station." Applied Mechanics and Materials 212-213 (October 2012): 989–97. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.989.
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The dynamic risk of underground cavities after gas outburst in coal uncovering construction of hydropower station was emphatically analyzed. The tunnel construction conditions in Xiangjiaba hydropower station were taken as an example. Based on the computational fluid dynamics theory and gas outburst theory, this paper used the ANSYS CFX CFD code to model the gas diffusion after gas outburst. The space-time characteristics of underground cavities dynamic risk were analyzed. The results show that the danger area ranges of gas explosion and asphyxia reach respectively the maximum value at about 140s and 50s. The influence range and duration of the former are significantly higher than the latter. The direction of hazardous area movement is mainly consistent with the air flow direction. ANSYS CFX simulation can visually display dynamic risk of underground cavities, and has a good prospect in gas hazard prevention in hydraulic and hydroelectric engineering.
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Klazly, Mohamad Mehi Alddin, and Gabriella Bognár. "Computational fluid dynamic simulation of laminar flow over a flat plate." Design of Machines and Structures 9, no. 1 (2019): 29–47. http://dx.doi.org/10.32972/dms.2019.004.
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The aim of this work is to apply CFD simulation on airflow over a flat plate to study the problem of hydrodynamic and thermal boundary layer and to analyse the effect of the length of the plate. The simulation ANSYS Fluent R18.1 has been applied to solve the governing equations of the flow. The simulation results have been verified by comparing the numerical solution with the analytical solution. The effect of changing the length of the plate is investigated while the other quantities were considered constant such as the free stream velocity, density, viscosity and temperature. The result showed excellent agreement between the numerical solution and analytical solution with maximum error of less than 6.19%. It is obtained that as the plate length increases the maximum value of the velocity contour, the Nusselt number, the wall shear stress, the skin friction coefficient and drag coefficient decreases.
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Kumar Sinha, Anjani, Eriki Ananda Kumar, and A. Johnrajan. "Flutter Analysis of an Aircraft Wing Using Computational Fluid Dynamics." Applied Mechanics and Materials 754-755 (April 2015): 817–27. http://dx.doi.org/10.4028/www.scientific.net/amm.754-755.817.
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In today’s aviation world, the design of aircraft wing becomes a challenging one for aeronautical engineers, in order to meet the aero elastic phenomenon such as flutter, wing divergence in both aerodynamics and structural aspects. There are so many FEM packages available for both flow and structural analysis such as ANSYS, NASTRAN, ALGOR, NISA, ADINA, COSMOS, etc. The paper presents the application of computational aero-elasticity (CA) methods to analyze the wing in both aerodynamic and structural aspects, using ANSYS-FLOTRAN; 2-D typical aerofoil sections were analyzed and validated with experimental results. Also the vibration behavior of wing section is analyzed under MODAL, HARMONIC, TRANSIENT and SPECTRUM analysis under the aerodynamic lift force and moments. The support reaction forces and moments at the fuselage-wing intersection are developed in this research.
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Pal, Shweta, Arun Kumar Wamankar, and Sailendra Dwivedi. "Review on Condenser Heat Transfer of Computational FluidDynamic System Using ANSYS." International Journal of Recent Development in Engineering and Technology 10, no. 2 (2021): 63–68. http://dx.doi.org/10.54380/ijrdetv10i109.
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Condenser is a high pressure side heat exchanger in which heated vapor enters and gets converted into liquid form by condensation process. In the condenser coil, gaseous substance is condensed into liquid by transferring latent heat content present in it to the surrounding. In the whole process, mode of heat transfer is conduction in condenser coil and forced convection between refrigerant and condenser. Any refrigeration system's backbone is comprised of condensers. It aids in the transfer of heat from the refrigerant to the universal sink, which is the atmosphere. The latent heat of the refrigerant is lost in the condenser. At the entry of the condenser, vapours from the compressor enter, and during the length of the condenser, the vapours are converted to liquid form, resulting in refrigerant in the form of saturated or even sub-cooled liquid form at the condenser's exit. In several sectors of chemical and petroleum engineering, computational fluid dynamics (CFD) is a common tool for simulating flow systems. As a branch of fluid mechanics, computational fluid dynamics (CFD) is an appropriate tool for investigating and modelling the ANSYS Program. The applicability of CFD studies for simulating the ANSYS Program was reviewed in this work. Ansys CFD is one of the industry's most powerful simulation packages
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Badduri, Srinivasa Reddy, G. Naga Srinivasulu, and S. Srinivasa Rao. "Computational Fluid Dynamic Analysis on PEM Fuel Cell Performance Using Bio Channel." Materials Science Forum 969 (August 2019): 524–29. http://dx.doi.org/10.4028/www.scientific.net/msf.969.524.
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A 3-D computational model was developed to examine the proton exchange membrane fuel cell (PEMFC) performance using Bio inspired (Bio channel) flow channel design bipolar plate. The model was developed using ANSYS FLUENT-15.0 software and simulations were carried out at 100 % humidity conditions. The parameters such as pressure distribution, hydrogen and oxygen concentrations and proton conductivity were briefly presented. The simulation results of bio channel are presented in the form of polarization curves. The results of a Bio channel compare with the conventional flow channel and observed that the bio channel gives a less pressure drop, uniform distribution of reactants and high cell voltage at a particular current density. From the observation from the polarization data, the bio channel performance was 20% higher than triple serpentine flow channel.
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Malik, F. Elmzughi, A. Hamoudah Mohammed, and Omar Almuhaddibi Tawfeeq. "Design and performance simulation of a soft artificial heart by using the ANSYS software." i-manager’s Journal on Future Engineering and Technology 19, no. 2 (2024): 1. http://dx.doi.org/10.26634/jfet.19.2.20487.
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Blood is pumped from the heart, a muscular organ, to various body organs via blood arteries. The aim of this paper is to create a temporary device, such as a pump, for individuals with cardiac diseases for whom survival without a transplant is unfeasible. Until a donor heart becomes available, the patient may have ample time with these makeshift devices. This paper uses engineering principles to explore the idea of an artificial heart. Using SOLIDWORKS 18 and ANSYS 21, numerical simulation and examination of the artificial heart were carried out. A Multiphysics static structural model and fluent fluid flow (CFD) analytical techniques were utilized to ascertain the dynamic response and impacts of pressure. SOLIDWORKS was utilized to model the 3D geometries, and ANSYS Design Modeler was used to import the geometries for preprocessing. The solver used throughout the study is ANSYS FLUENT, a tool used to analyze fluid flow troubles, known as Computational Fluid Dynamics (CFD). Next is mesh generation, which means discretization of the domain to solve governing equations at each cell and later specify the boundary zones to apply boundary conditions for this paper. The simulation results showed that at maximum levels of absolute pressure in air pressurized chambers, the performance of the heart remained secure and suitable for comfortable conditions.
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Raja, Vijayanandh, Senthil Kumar Solaiappan, Parvathy Rajendran, Senthil Kumar Madasamy, and Sunghun Jung. "Conceptual Design and Multi-Disciplinary Computational Investigations of Multirotor Unmanned Aerial Vehicle for Environmental Applications." Applied Sciences 11, no. 18 (2021): 8364. http://dx.doi.org/10.3390/app11188364.
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This study focuses on establishing a conceptual design for a multirotor unmanned aerial vehicle (UAV). The objectives of this octocopter are to reduce the number of flight cancelations and car accidents owing to low-visibility issues and to improve abnormal environmental conditions due to the presence of smoke. The proposed octocopter contains a convergent–divergent [CD] duct-based storage tank, which provides a platform to store saltwater and allows it to fly in foggy zones. Fine saltwater is sprayed from the octocopter and dispersed into the low clouds, thereby altering the vapor’s microphysical processes to break it up and improve visibility. The nature of the seawater and its enhanced fluid properties, due to the involvement of octocopter, creates the fluid flow mixing between atmospheric fluids and spraying particles, which increases the settling of foggy and smokey content groundward. For deployment, the conceptual design of the octocopter was initially constructed through analytical approaches. Additionally, three unique historical relationships were created. The standard engineering approaches involved in this work were stability analysis through MATLAB and fluid-property analysis through computational fluid dynamics (CFD) cum multiple reference frame (MRF) tools. The systematic model of this octocopter was developed by CATIA, and thereafter CFD and fluid–structure-interaction (FSI) analyses were computed, in ANSYS Workbench, on the octocopter for various environmental conditions. The aerodynamic forces on the drone, the enhancement of dynamic pressure by the presence of high amounts of rotors and nozzle sprayer, suitable material to resist aerodynamic loadings, and tests on the efficiency of the controller and its electronic components were investigated in detail. Finally, the proposed octocopter-based dynamic system was conceptually constructed.
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Rodriguez, Dr Daniel M., and Dr Rachel Kim. "COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF TESLA CYBERTRUCK'S AERODYNAMIC PERFORMANCE AT VARYING SPEEDS." International Journal of Research in Engineering 4, no. 9 (2024): 1–4. https://doi.org/10.55640/ijre-04-09-01.
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Background: The Tesla Cybertruck's unconventional angular design has sparked widespread interest and debate regarding its aerodynamic efficiency. Aerodynamics plays a critical role in electric vehicle (EV) performance, influencing range, stability, and energy consumption. Objective: This study employs Computational Fluid Dynamics (CFD) to evaluate the aerodynamic behavior of the Tesla Cybertruck across a range of speeds, aiming to quantify drag forces, pressure distribution, and flow separation patterns. Methods: A detailed 3D model of the Cybertruck was subjected to CFD simulations using ANSYS Fluent at speeds ranging from 30 km/h to 150 km/h. The analysis included calculation of drag coefficients (Cd), visualization of flow fields, and assessment of pressure zones. Turbulence was modeled using the k-ε and SST k-ω models to ensure accuracy across flow regimes. Results: The Cybertruck exhibited a relatively high drag coefficient compared to traditional EV designs, primarily due to its sharp edges and flat surfaces. However, aerodynamic performance remained consistent across moderate speed ranges, with noticeable increases in drag and flow separation at higher velocities. Conclusion: While the Cybertruck's geometry poses aerodynamic challenges, its performance is sufficient for practical applications. Design modifications such as rear tapering or underbody streamlining could further enhance efficiency without compromising aesthetics or structural integrity.
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Bucurenciu, Cristian, Victor S. Costache, and Gabriela S. Cândea. "Study of aortic dissections treatment. Segmentation, simulation and valiadation of surgical results." MATEC Web of Conferences 290 (2019): 04004. http://dx.doi.org/10.1051/matecconf/201929004004.
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Nowadays, Computational Fluid Dynamics (CFD) it’s seen as the new trend in the management of aortic pathologies. Together with visualization capabilities of cardiovascular magnetic resonance (CMR) and computed tomography (CT) imaging, real time segmentation (volumetric) models further used as meshes in Computational Fluid Dynamic supply to the clinicians an innovative and extensive decision-making system. In the present paper, we identified and analysed the clinical indicators (lumens diameters, fenestrated area and blood volume) monitored by clinicians to evaluate the patient’ condition before and after the intervention. In order to achieve the targeted aims, we used CT scans as input data (segmented with MIMICS software) and output 3D models (3matic), further processed to mesh model in ANSYS software. Computational results validate the improved patient’ condition, meaning the blood velocity tend to have values to normal flowing conditions. As a conclusion, the linear modification of velocity can be used in further investigations as an input value of pathology treatment
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Giri, K. C. "Study of Thermal Performance of Closed Loop Pulsating Heat Pipe using Computational Fluid Dynamics." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (2021): 1384–88. http://dx.doi.org/10.22214/ijraset.2021.38088.
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Abstract: Pulsating heat pipe is a heat transfer device which works on two principles that is phase transition and thermal conductivity which transfer heat effectively at different temperatures. Different factors affect the thermal performance of pulsating heat pipe. So, various researchers tried to enhance thermal conductivity by changing parameters such as working fluids, filling ratio, etc. Analysis of heat transfer characteristics of closed loop pulsating heat pipe (CLPHP) is to be carried out by using Computational Fluid Dynamics. The CLPHP is to be modelled on ANSYS Workbench, the flow of CLPHP is to be observed under specific boundary conditions by using ANSYS Fluent software. Acetone and Water are taken as the working fluid with 70% filling ratio at ambient temperature 30° C and the heat flux of 200 W is supplied at evaporator. Also, the analysis has been done to know the behaviour of PHPs under varying supply of heat flux at evaporator (inlet), the output heat flux is obtained at condenser (outlet) and find out how the heat flux is varying at different temperatures. CFD results shows the heat transfer characteristics observing the performance of CLPHP is a numerical manner. The obtained CFD results are compared with the experimental. The outputs of the simulations are plotted in graphs and outlines. Keywords: Closed Loop Pulsating Heat Pipe, CFD, Heat Transfer, ANSYS.
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Gusti Muttaqin, Ibnu, Made Sucipta, and Made Suarda. "SIMULASI COMPUTATIONAL FLUID DYNAMIC PADA MODEL TURBIN VORTEX VARIASI KECEPATAN ROTASI RUNNER." SIBATIK JOURNAL: Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, dan Pendidikan 1, no. 8 (2022): 1445–54. http://dx.doi.org/10.54443/sibatik.v1i8.188.
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Desa terisolir di Indonesia sulit untuk mendapatkan energi listrik, maka perlu adanya solusi energi terbarukan untuk jawaban terhadap kebutuhan energi listrik di desa terisolir. Pembangkit listrik tenaga air menjadi salah satu pilihan dalam memanfaatkan sumber energi terbarukan, salah satunya adalah teknologi turbin vortex. Penilitian Dhakkal, dkk 2017 menunjukan bahwa kecepatan rotasi berpengaruh terhadap kinerja dari turbin vortex. Maka penelitian ini akan memvariasikan kecepatan rotasi yaitu 70 rpm, 90 rpm, 110 rpm, dan 130 rpm dengan metode simulasi CFD software Ansys Fluent. Dari penelitian ini didapatkan hasil pada kecepatan rotasi 70 rpm sampai 90 rpm terjadi kenaikan efisiensi, efisiensi tertinggi terdapat pada 90 rpm dengan nilai momen puntir 1,988 n/m dan efisiensi 34,74 %. Sedangkan ketika kecepatan rotasi dinaikan sampai 150 rpm, terjadi penurunan efisiensi. Efisiensi terendah terdapat pada kecepatan sudut 150 rpm dengan nilai momen puntir 0,859 n/m dan efisiensi 25,02 %. Hal ini disebabkan karena peluapan aliran dan kecepatan rotasi yang tinggi.
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Goga, Vladimír, Juraj Paulech, and Michal Váry. "Cooling of Electrical Cu Conductor with PVC Insulation – Analytical, Numerical and Fluid Flow Solution." Journal of Electrical Engineering 64, no. 2 (2013): 92–99. http://dx.doi.org/10.2478/jee-2013-0013.
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This paper describes calculation of cooling process of electrical Cu conductor with PVC insulation. Three types of solutions were performed.Analytical solution considers free convection and radiation effect of heat transfer. Numerical solution was performed by finite element method (FEM) using software ANSYS Workbench and fluid flow solution was performed by computational fluid dynamics (CFD) analysis in software ANSYS CFX. Results from all types of solutions were compared with results of the experimental measurement.
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Yussra Malallah Abdullah, Ghadeer Salim Aziz, Hala K. salah, and Hussein Kadhim Sharaf. "Simulate the Rheological Behaviour of the Solar Collector by Using Computational Fluid Dynamic Approach." CFD Letters 15, no. 9 (2023): 175–82. http://dx.doi.org/10.37934/cfdl.15.9.175182.
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In the present study, the computational fluid dynamics (CFD) method was utilized to explore the rheological behavior of the flat solar collector. ANSYS 16.1 has been used to do an analysis on the drafted three-dimensional model. In order to investigate the heat transmission from the solar panel to the fluid, a CFD tool has been used. The effectiveness of the heat transfer across the entire system has been evaluated with the help of Nano fluid. Both 0.3 and 0.5 meters per second might be considered the speed of the water. These results have been compared to others and validated in accordance with those standards. The most recent findings from this line of investigation have shown that include a greater number of specifics in the working fluid of the system can contribute to an increase in the temperature at which the solar plate discharges its heat. In addition to this, it is possible to get the highest possible temperature by bringing the velocity value down to its lowest possible range.
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Sivakumar, Karthikeyan, N. Kulasekharan, and E. Natarajan. "Computational Investigations in Rectangular Convergent and Divergent Ribbed Channels." International Journal of Turbo & Jet-Engines 35, no. 2 (2018): 193–201. http://dx.doi.org/10.1515/tjj-2016-0032.
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Abstract Computational investigations on the rib turbulated flow inside a convergent and divergent rectangular channel with square ribs of different rib heights and different Reynolds numbers (Re=20,000, 40,000 and 60,000). The ribs were arranged in a staggered fashion between the upper and lower surfaces of the test section. Computational investigations are carried out using computational fluid dynamic software ANSYS Fluent 14.0. Suitable solver settings like turbulence models were identified from the literature and the boundary conditions for the simulations on a solution of independent grid. Computations were carried out for both convergent and divergent channels with 0 (smooth duct), 1.5, 3, 6, 9 and 12 mm rib heights, to identify the ribbed channel with optimal performance, assessed using a thermo hydraulic performance parameter. The convergent and divergent rectangular channels show higher Nu values than the standard correlation values.
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Žic, Elvis, Patrik Banko, and Luka Lešnik. "Hydraulic analysis of gate valve using computational fluid dynamics (CFD)." Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 29, no. 3 (2020): 275–88. http://dx.doi.org/10.22630/pniks.2020.29.3.23.
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As a very important element of most water supply systems, valves are exposed to the effects of strong hydrodynamic forces. When exposed to large physical quantities, the valve and piping can be damaged, which could endanger the performance of a water supply system. This is the main reason why it is necessary to foresee and determine the maximum values of velocity, pressure and other physical quantities that can occur in the system under certain conditions. Predicting extreme conditions allows us to correctly size the valve for the expected conditions to which the valve might be exposed, which is also the main objective of this paper. One of the methods for predicting and determining extreme values on a valve is to perform a simulation with computational fluid dynamics (CFD). This is exactly the method used in the preparation of this paper with the aim of gaining insight into the physical magnitudes for models of gate valves positioned inside a pipe under characteristic degrees of valve closure. The Ansys CFX 19.1 and Ansys Fluent 19.1 software was used to simulate the hydrodynamic analysis and obtain the required results. The hydrodynamic analysis was performed for four opening degrees of gate valve
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Wateya, Ali Wambi, Twaibu Semwogerere, Richard O. Awichi, and Asaph Keikara Muhumuza. "Mathematical Modelling of Oil Pipeline Leakages Using Computational Fluid Dynamics - Case of BIDCO Oil Processing Refinery, Uganda." JOURNAL OF ADVANCES IN MATHEMATICS 21 (February 16, 2022): 25–31. http://dx.doi.org/10.24297/jam.v21i.9163.
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The leakage flow phenomena of a refinery oil pipe with a leakage point is numerically studied with the purpose to minimize oil leakage using Computational Fluid Dynamics (CFD) approach. Among consequences of oil pipe leakages are losses as a result of property loss (oil), cost of pipe replacement and also death due to fire or explosion. To understand the leakage phenomena, pipe characteristics at the leakage orifice are necessary. In the simulation, considering a pipe with a leak orifice of 0.002m, diameter 0.06 m and length 10 m, single phased flow was considered. The leakage through the pipe was studied based on fluid dynamics simulations using a Computational fluid dynamic tool ANSYS FLUENT software 17.2 where the Navier-Stokes were solved and for turbulence the standard k-ε was considered. Results from this study show that the leakage flow rate increases with increase in velocity inflow of the fluid. The pressure effect was also studied at the vicinity of the leak and results also show that an increase in velocity increases the pressure drop. Therefore, keeping the inflow velocity range of 0.1ms−1 to 2 ms−1 show minimal leakage rates.
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Erdoğan, Ahmet, and Muhammet Tibet Sığırcı. "Computational Fluid Dynamic Simulation of Fabric Cooling in a Stenter Machine." Applied Sciences 14, no. 3 (2024): 1103. http://dx.doi.org/10.3390/app14031103.
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Stenter machines are used to remove moisture from fabrics produced in the textile industry. Following the drying process, the cooling process, which is applied to fabrics using injector channels, is conducted in the last section of a stenter machine, preventing fabrics from expanding and the degradation of their quality. The present study mainly aimed to investigate the fabric-cooling process in a stenter machine used actively in a textile company. First, industrial data were obtained with some experiments, and computational fluid dynamics (CFD) simulations were then conducted by validating the industrial data. All CFD models were simulated using ANSYS Fluent commercial CFD software. A total of four parameters, including two geometric and two operating parameters, were considered in order to investigate their effects on the fabric-cooling performance of the stenter machine. While the geometric parameters were the porosity (β) and injector angle (α), the operating parameters were the velocity of the airflow that cools the fabrics and fabric velocity, representing the movement of the fabric. As outputs of CFD simulations, fabric surface temperature values, the distributions of fabric surface temperatures, and some streamlines were illustrated. Although low values of porosity (β1 = 0.05) and injector angle (α1 = 0°) provided better performance, airflow velocity could be increased one or two times for the range of these constant parameters.
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Riszal, Akhmad. "Fluid Flow Analysis Subsonic Wind Tunnel for Aerodynamic Testing Using Computational Fluid Dynamics (CFD)." MECHANICAL 15, no. 1 (2024): 194. https://doi.org/10.23960/mech.v15i1.4407.
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Seiring berkembangnya zaman, banyak sekali teknologi yang dapat dimanfaatkan untuk mendukung penelitian, terutama dalam pembuatan model, alat, dan instrumentasi. Salah satu alat yang dapat digunakan untuk menunjang penelitian aerodinamis adalah Wind Tunnel. Wind Tunnel merupakan perangkat pengujian aerodinamis yang mampu mensimulasikan dan memvisualisasikan kondisi aliran fluida di sekitar objek yang diuji. Tujuan dari penelitian ini adalah menganalisis aliran fluida pada berbagai bagian terowongan angin dengan menggunakan aliran fluida seragam. Analisis akan dilakukan dengan menggunakan software Ansys khususnya Computational Fluid Dynamics (CFD). Parameter yang akan diuji antara lain kecepatan fluida 6 m/s. Pada kecepatan tertentu, eksperimen aliran fluida akan dilakukan untuk memvisualisasikan distribusi aliran di berbagai bagian Terowongan Angin, dari bagian kontraksi hingga Diffuser. Visualisasi aliran pada bagian kontraksi, akan terjadi peningkatan tekanan fluida menuju bagian uji kontur tekanan total. Ketika fluida mengalir melalui bagian uji dengan besaran kecepatan, ia akan bertransisi ke aliran laminar dan fluida melewati bagian diffuser, sehingga terjadi penurunan kecepatan.
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Mikołajczyk, Anna, Adam Dziubiński, Paulina Kurnyta-Mazurek, and Stanisław Kachel. "Flow around an Aircraft Model—Comparison between Hydrodynamic Tunnel Tests and Computational Fluid Dynamics Simulations." Applied Sciences 13, no. 24 (2023): 13035. http://dx.doi.org/10.3390/app132413035.
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This paper presents a comparative analysis of the results obtained using the computational fluid dynamic method and a hydrodynamic tunnel. The aerodynamic properties of the General Dynamics F-111 Aardvark aircraft were subjected to both qualitative and quantitative assessment. In both cases, the same geometric model of the aircraft was used. For the hydrodynamic tunnel tests, the model was 3D printed, while for the CFD simulations, the geometry was imported into ANSYS Fluent 2021 R2 software. During quantitative studies, aerodynamic characteristics, including the coefficients of lift, drag, and pitching moment for the aircraft, were determined over a wide range of angles of attack. In turn, flow field images and pathline visualization of the vortex were obtained following qualitative studies. The comparative analysis showed that high consistency between the simulation and experimental results was achieved.
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Kidane, Halefom, Janos Buzas, and Istvan Farkas. "Computational Analysis of Horizontally and Inclined Finned Solar Air Collector." Jurnal Tekno Insentif 17, no. 2 (2023): 150–59. http://dx.doi.org/10.36787/jti.v17i2.1172.
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ABSTRACT
 The majority of researchers have carried out simulations using computational fluid dynamics (CFD) and experimental investigation for design, manufacturing, performance evaluation, understanding flow behavior, efficiency prediction, condition optimization, etc. The main objective of the recent paper is to compare horizontally finned and 45° inclined finned solar air collector absorbers and to select the better construction using numerical simulation. ANSYS Fluent Workbench 2022 with renormalization-group (RNG) group k–ε turbulence model was applied for the analysis of the computational domain of solar air heaters. The simulation results generated using CFD were validated with data from the literature, and the simulation results were in agreement with experimental results from the relevant literature. Based on the simulation results the horizontal finned solar air collector absorber has better heat transfer behavior than the 45° inclined.
 ABSTRAK
 Mayoritas peneliti umumnya melakukan simulasi menggunakan perangkat komputasi, seperti computational fluid dynamic (CFD) dan eksperimental untuk menunjang keperluan desain, rancang bangun sistem, evaluasi kinerja dan karakteristik aliran, memperkirakan kinerja, serta optimalisasi, dll. Target dari makalah ini adalah membandingkan pemanas udara surya dengan sirip posisi horizontal dan miring 45° yang dipasang pada kolektor surya untuk memilih konstruksi terbaik secara numerik. ANSYS Fluent Workbench 2022 dengan model turbulensi k–ε renormalisasi grup (RNG) digunakan sebagai perangkat simulasi. Hasil simulasi divalidasi dengan data eksperimental dari literatur yang relevan, dan memperlihatkan kecenderungan yang sama. Berdasarkan simulasi, kolektor udara surya bersirip horizontal mempunyai karakteristik perpindahan panas yang lebih baik dibandingkan dengan kolektor udara bersirip miring 45°.
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Dykas, Sławomir, Mirosław Majkut, Krystian Smołka, and Michał Strozik. "Analysis of the steam condensing flow in a linear blade cascade." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 5 (2017): 501–14. http://dx.doi.org/10.1177/0957650917743365.
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This study presents experimental and numerical testing of the steam condensing flow through a linear blade cascade made of blades of a 200 MW steam turbine last stage stator. The tests were carried out on an in-house laboratory stand and using an in-house numerical code modelling the water vapour flow with homo- and heterogeneous condensation. Additionally, this paper presents a comparison of calculations of a flow field modelled by means of a single-fluid model using both an in-house computational fluid dynamics code and the commercial Ansys CFX v16.2 software package. The aim of the research was to identify difficulties involved by comparing the numerical modelling results with the experimental data for a linear blade cascade. The experimental results, which are very well supplemented by those obtained from numerical computations, may be used to validate computational fluid dynamics codes.
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Sapiński, Bogdań, and Marcin Szczęch. "CFD MODEL OF A MAGNETORHEOLOGICAL FLUID IN SQUEEZE MODE." Acta Mechanica et Automatica 7, no. 3 (2013): 180–83. http://dx.doi.org/10.2478/ama-2013-0031.
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Abstract The study briefly outlines a CFD model of a magnetorheological (MR) fluid operated in squeeze mode with a constant interface area using the CFD (Computational Fluid Dynamics) approach. The underlying assumption is that the MR fluid is placed between two surfaces of which at least one can be subject to a prescribed displacement or a force input. The widely employed Bingham model, which fails to take into account the yield stress variations depending on the height of the gap, has been modified. Computation data obtained in the ANSYS CFX environment are compared with experimental results.
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Dileep, Karuthedath, Arun Raj, Divakaran Dishnu, Ahamed Saleel, Mokkala Srinivas, and Simon Jayaraj. "Computational fluid dynamics analysis on solar water heater: Role of thermal stratification and mixing on dynamic mode of operation." Thermal Science 24, no. 2 Part B (2020): 1461–72. http://dx.doi.org/10.2298/tsci190601419d.
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The present work attempts to demonstrate the competence and reliability of the proposed computational solver for real-scale modelling and analysis of a commercially available evacuated tube collector type solar water heater. A 3-D, transient numerical solver with user-defined functions is modelled using CFD program ANSYS-Fluent 15.0?. The objective is to analyse the evacuated tube collector type solar water heater in two states of operation, namely, static (stagnant charging) and dynamic (retrieval) modes. This work emphasizes the determination of the impact of thermal stratification, and fluid mixing in the storage tank on the outlet temperature profile during discharging. Volume flow rates vary from 3-15 Lpm. The reported findings suggest that with an increase of fluid-flow during discharge, the stratified layers disorient and lead to rapid mixing, which eventually results in an earlier drop in the outlet water temperature. Furthermore, at low fluid-flow rates, the stratified layers remain intact with only a gradual decay in the outlet temperature profile. The analysis reveals that based on the user?s choice, it is possible to vary discharge flow rate until 7 Lpm without a significant drop in the outlet water temperature. Furthermore, computational results have been successfully validated with experimental findings.
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Prasetio, Dimas, Zuliantoni, Mulya Juarsa, Sri Ismarwanti, and Sunandi Kharisma. "ANALISA DISTRIBUSI TEMPERATUR INTERMEDIATE TANK FASSIP-07 MENGGUNAKAN METODE COMPUTATIONALFLUID DYNAMICS (CFD)." Rekayasa Mekanika 9, no. 1 (2025): 33–37. https://doi.org/10.33369/rekayasamekanika.v9i1.39825.
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Penelitian ini bertujuan untuk memahami distribusi temperatur pada sistem sirkulasi alami di Intermediate Tank FASSIP-07 menggunakan metode Computational Fluid Dynamics (CFD). Simulasi dilakukan menggunakan software Ansys Workbench R1 2024, dengan variasi temperatur inlet sebesar 70°C, 80°C, dan 90°C. Hasil penelitian menunjukkan bahwa distribusi temperatur tertinggi ditemukan pada bagian inlet dengan suhu 90°C, sementara bagian outlet mencapai suhu terendah pada 70°C. Kesimpulan ini diperoleh dari analisis aliran fluida yang didorong oleh fenomena buoyancy akibat perbedaan densitas. Penelitian ini menunjukkan potensi penggunaan sistem pendingin pasif untuk reaktor nuklir guna meningkatkan keamanan dalam kondisi darurat. Keywords: CFD, Distribusi Temperatur, FASSIP-07, Ansys, Sistem Pendingin Pasif, Reaktor Nuklir
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Rahmati, Seyed Mohammadali, and Alireza Karimi. "A Nonlinear CFD/Multibody Incremental-Dynamic Model for A Constrained Mechanism." Applied Sciences 11, no. 3 (2021): 1136. http://dx.doi.org/10.3390/app11031136.
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Numerical analysis of a multibody mechanism moving in the air is a complicated problem in computational fluid dynamics (CFD). Analyzing the motion of a multibody mechanism in a commercial CFD software, i.e., ANSYS Fluent®, is a challenging issue. This is because the components of a mechanism have to be constrained next to each other during the movement in the air to have a reliable numerical aerodynamics simulation. However, such constraints cannot be numerically modeled in a commercial CFD software, and needs to be separately incorporated into models through the programming environment, such as user-defined functions (UDF). This study proposes a nonlinear-incremental dynamic CFD/multibody method to simulate constrained multibody mechanisms in the air using UDF of ANSYS Fluent®. To testify the accuracy of the proposed method, Newton–Euler dynamic equations for a two-link mechanism are solved using Matlab® ordinary differential equations (ODEs), and the numerical results for the constrained mechanisms are compared. The UDF results of ANSYS Fluent® shows good agreement with Matlab®, and can be applied to constrained multibody mechanisms moving in the air. The proposed UDF of ANSYS Fluent® calculates the aerodynamic forces of a flying multibody mechanism in the air for a low simulation cost than the constraint force equation (CFE) method. The results could have implications in designing and analyzing flying robots to help human rescue teams, and nonlinear dynamic analyses of the aerodynamic forces applying on a moving object in the air, such as airplanes, birds, flies, etc.
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Ghildyal, A., V. S. Bisht, A. S. Bisht, and K. Kishor. "Computational Fluid Dynamics Study of Roughened Solar Air Heater." Advanced Science, Engineering and Medicine 12, no. 11 (2020): 1408–11. http://dx.doi.org/10.1166/asem.2020.2595.
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A 2-dimensional numerical investigation has been conducted to examine the effect of three distinct turbulators (namely M shaped, Wedge shaped and Reverse wedge shaped) on the performance of solar air heater (SAH) for relevant Reynolds number ranges from 4000 to 18000. CFD code ANSYS FLUENT is used for simulation of turbulent airflow. For all three geometries constant ratio of e/Dh = 0.021 (where e = 0.7 and Dh = 33.33) and ratio P/e = 14.285 (where p = 10) is used. Turbulence Kinetic energy and velocity contours for all turbulators have also been studied in this analysis. M-Shaped turbulators outperformed the other two turbulators with maximum value of THPP.
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Aljuhaishi, Saif, Yaseen K. Al-Timimi, and Basim I. Wahab. "Comparing Turbulence Models for CFD Simulation of UAV Flight in a Wind Tunnel Experiments." Periodica Polytechnica Transportation Engineering 52, no. 3 (2024): 301–9. http://dx.doi.org/10.3311/pptr.24004.
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Wind tunnel tests are costly and time-consuming, and the accuracy of the tests is limited by the size of the tunnel, to solve this problem, researchers use computational fluid dynamics (CFD) to conduct wind tunnel experiments using a computer because it is less timely and less costly. Computerized testing of drone's models using wind tunnel experiment simulation in computational fluid dynamic (CFD) software requires knowledge of the most suitable turbulence model for this drone. In this paper ANSYS fluent program has been used to test four most common turbulence models for use (Spalart-Allmaras, K-Epsilon, K-Omega and Reynolds stress) and laminar flow on the ScanEagle drone model (an aerial reconnaissance drone used in military and intelligence operations) and calculated their effect on aerodynamic parameters In terms of accuracy and time to solution, concluded that the best turbulence model in terms of balancing accuracy and the time taken for the calculation is K-Omega model.
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Tomescu, S., and I. O. Bucur. "Numerical Investigation of Oil Gas Separation with the Use of VOF CFD." Engineering, Technology & Applied Science Research 11, no. 6 (2021): 7841–45. http://dx.doi.org/10.48084/etasr.4446.
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In this research paper, a numerical study regarding gas-oil separation is presented. Employing the geometry of a classic separator used by the NRDI for Gas Turbines COMOTI and a Computer-Aided Design (CAD) software, the computational domain was defined. To perform the Computational Fluid Dynamics (CFD) investigation, the mesh was created with the ANSYS Meshing tool, and the ANSYS CFX was employed as a solver. The computational domain was split into 5 subdomains, 3 were fluid and 2 were defined as porous media. The volume porosity, loss model, and permeability were set up. In terms of turbulence flow, the standard k–ε model was adopted. The results of the numerical calculations in terms of oil volume fraction and streamline profiles were used to analyze the separator configuration. The results show that the numerical investigation with the VOF (Volume of Fluid Method) - CFD model is capable of analyzing the performance of a two-phase separator equipped with two demisters-porous media.
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Bigourdan, Théo, Arnaud Cadiou, Arnaud Guertin, and Ferid Haddad. "Discussions on liquid bismuth target use as an alternative for astatine-211 production." EPJ Web of Conferences 285 (2023): 09002. http://dx.doi.org/10.1051/epjconf/202328509002.
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Astatine-211 is an alpha emitter that has been identified as a good candidate for targeted alpha therapy. There is an increasing demand on this radionuclide. Very intense beam from linac being put in operation nowadays could be used to meet this demand. This document presents the design exploration of concepts of liquid bismuth targets dedicated to astatine-211 production. Three concepts are presented and analyzed: a capsule, a fluid loop and a windowless fluid loop. Structural and thermal sizing were performed using mechanical Finite Element models (ANSYS Workbench) and Computational Fluid Dynamic models (FLUENT). Production rates were assessed accordingly. Feasibility and expected performances are discussed in conclusion.
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Hu, Tianmu. "Fluxion Form Comparison between Newton Fluid and Bingham Fluid based on Three-Dimensional Numerical Simulation With Examples of Blood in Aorta and Water." Journal of Physics: Conference Series 2386, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1742-6596/2386/1/012006.
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Abstract The rheological properties of blood is one of the most important parameter to make an influence on human health. And the numerical simulation is a popular methodology to conduct research towards the fluxion form of blood. In this dissertation, this paper uses Ansys Aim to computationally analyze the vessels based on the theory of Computational Fluid Dynamics (CFD for short). Two kinds of fluid, namely the Newton fluid, water, and the non-Newton fluid, blood, are taken into consideration. And the model of the blood’s non-Newton fluid is set as the Bingham model. Two fluids’ distributions of velocity and absolute stress are given, and the comparison of their fluxion form is done. The simulated results reveal that the biggest velocity in Bingham model is 18.07% bigger than that in Newton model, and the max difference of stress in Bingham model is 139% bigger than that in the water model. The results stated above pave the way for the subsequent research.
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Meena, Rahul Kumar, Ritu Raj, S. Anbukumar, Mohammad Iqbal Khan, and Jamal M. Khatib. "Fluid Dynamic Assessment of Tall Buildings with a Variety of Complicated Geometries." Buildings 14, no. 12 (2024): 4081. https://doi.org/10.3390/buildings14124081.
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The exponential increase in population has led to a shortage of land for constructing tall buildings, resulting in the need to design irregular structures due to the limited availability of land. Assessing the impact of wind-generated effects can be achieved utilizing the Computational Fluid Dynamics (CFD) method, specifically employing ANSYS. This involves resolving the intricate fluid dynamics problem through numerical analysis using the ANSYS software. The validation study is performed on a standard shape-building model where the result is compared with experimental values and other international standards. The outcomes are presented in a graphical format, such as mean pressure, streamline, and pressure distribution in the vertical and horizontal planes. This research has studied four building models with equal area and height. Models A and B have regular shapes, while Models C and D exhibit an irregular ‘Y’ shape. The wind incidence angle was adjusted between 0 and 180 degrees at every 15-degree interval. The results were validated to ensure the accuracy of the numerical techniques employed. This involved performing validation and grid sensitivity analyses, which showed consistent results comparable to experimental data and established international standards. Model-C irregular-shaped buildings demonstrated the highest efficiency in minimizing wind loads among the building models examined in this study.
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Rahuman, Sini, A. Mohamed Ismail, Shyla Manavalan Varghese, George Kwamina Toworfe, and Bashyam Sasikumar. "Wind Flow Simulation around Rhizophora Mangrove Roots Using Computational Fluid Dynamics." Journal of Nanomaterials 2022 (May 5, 2022): 1–11. http://dx.doi.org/10.1155/2022/5722653.
Full textAbstract:
The characteristics of Rhizophora mangrove root structures and its efficiency in velocity dissipation process of heavy wind are studied in this paper. The influence of Rhizophora Mangrove roots on severe tropical storm (88 -117 km/hr.), intense tropical cyclone (166-212 km/hr.), and very intense tropical cyclone (above 212 km/hr.) is investigated by simulating wind flow around these roots with inlet velocities 100 km/hr., 200 km/hr., and 300 km/hr. ANSYS Fluent software is used for developing the computational fluid dynamic (CFD) model and to perform simulation and analysis. The flow velocity profile reveals that these mangrove root structures have a significant impact on the severe and intense wind flow. It is found that the Rhizophora root structures reduce the velocity of the wind by more than 80% of the inlet velocity. This information can be utilized to visualize and better understand the benefits of these root structures and to reestablish mangrove forest, create new breakwater models, and to strengthen the existing ones.