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Journal articles on the topic 'CFD, Software, FloEFD, Simulation'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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1

Baran, Krzysztof, Antoni Różowicz, Henryk Wachta, Sebastian Różowicz, and Damian Mazur. "Thermal Analysis of the Factors Influencing Junction Temperature of LED Panel Sources." Energies 12, no. 20 (October 17, 2019): 3941. http://dx.doi.org/10.3390/en12203941.

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Limiting junction temperature Tj and maintaining its low value is crucial for the lifetime and reliability of semi-conductive light sources. Obtaining the lowest possible temperature of Tj is especially important in the case of LED panels, where in a short distance there are many light sources installed, between which there occurs mutual thermal coupling. The article presents results of simulation studies connected with the influence of construction and ambient factors that influence the value of junction temperature of exemplary LED panel sources. The influence of radiator’s construction, printed circuit boards, as well as the influence of ambient factors, such as ambient temperature Ta and air flow velocity v were subjected to the analysis. Numerical calculations were done in the FloEFD software of the Mentor Graphics company, which is based on computational fluid dynamics (CFD). For construction of the LED thermal panel model the optical efficiency ηo and real thermal resistance Rthj-c were determined in a laboratory for the applied light sources.
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2

Thilmany, Jean. "How Does Your Fluid Flow?" Mechanical Engineering 125, no. 12 (December 1, 2003): 35–37. http://dx.doi.org/10.1115/1.2003-dec-3.

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This article reviews the method of analyzing fluid flow in structures and designs, which is enjoying a burst of interest. Twenty years later, manufacturers across a myriad of industries are licensing the technology from a pool of vendors who now market computational fluid dynamics (CFD) packages of many stripes. Engineers use CFD to predict how fluids will flow and to predict the quantitative effects of the fluid on the solids with which they are in contact. Airflow is commonly studied with the software. Many mechanical engineers do not need access to all the bells and whistles an advanced CFD program can provide. Advanced analysis programs are usually the purview of a user trained on a particular CFD package. Engineers used CFD to determine how to best position the fans so that air flowed inside the refrigerator and the freezer in the most efficient way. After studying fluid flow simulations, they made prototypes of the most promising modeled designs to see if the prototypes matched CFD simulation results.
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3

SMG Akele, C. Aganama, E. Emeka, Y. Abudu-Mimini, S. Umukoro, and Okonkwo Raymond. "CFD Port Flow Simulation of Air Flow Rate in Spark Ignition Engine." International Journal of Engineering and Management Research 10, no. 6 (December 25, 2020): 87–95. http://dx.doi.org/10.31033/ijemr.10.6.13.

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In the early stages of development of internal combustion engine (ICE), limitations such as speed, range, and lifespan led to series of researches resulting in the reduction or elimination of these limitations. Combustion in ICE is a rapid and controlled endothermic reaction between air in oxygen and fuel which is accompanied by significant increase in temperature and pressure with the production of heat, flame and carbon particle deposits. This combustion process is a phenomenon that involves turbulence, loss of air-fuel mixture during inflow and outflow into the cylinder. The objection of this study is to perform port flow analysis on ICE to determine flow rate and swirl at different valve lift under stationary engine parts.Methodology employed to analyze and solve the ICE port flow simulation is the use of CFD software that uses the finite volume method of numerical analysis to solve the continuity, Navier-Stokes and energy equations governing the air medium in the internal combustion engine cylinder. The model geometry for the analysis was generated using the Ansys Design Modeller for one cylinder, one suction port and one exhaust port, and two valves. The domain considered is internal combustion engine suction port with 86741 nodes and 263155 elements. Study results revealed that air mass was more concentrated around the valve and inlet port cross-section with swirling motion seen, air stream experienced turbulence as it flowed downwards inside the cylinder, air stream spread was turbulent which will eventually enhance smooth combustion, swirling air stream moves towards the cylinder wall where it experienced tumbling and turbulent which will eventually enhance smooth combustion. From the simulation it was revealed that mass flow rate of inlet air increases with valve lift.
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SMG Akele, C. Aganama, E. Emeka, Y. Abudu-Mimini, S. Umukoro, and Okonkwo Raymond. "CFD Port Flow Simulation of Air Flow Rate in Spark Ignition Engine." International Journal of Engineering and Management Research 10, no. 6 (December 25, 2020): 87–95. http://dx.doi.org/10.31033/ijemr.10.6.13.

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In the early stages of development of internal combustion engine (ICE), limitations such as speed, range, and lifespan led to series of researches resulting in the reduction or elimination of these limitations. Combustion in ICE is a rapid and controlled endothermic reaction between air in oxygen and fuel which is accompanied by significant increase in temperature and pressure with the production of heat, flame and carbon particle deposits. This combustion process is a phenomenon that involves turbulence, loss of air-fuel mixture during inflow and outflow into the cylinder. The objection of this study is to perform port flow analysis on ICE to determine flow rate and swirl at different valve lift under stationary engine parts.Methodology employed to analyze and solve the ICE port flow simulation is the use of CFD software that uses the finite volume method of numerical analysis to solve the continuity, Navier-Stokes and energy equations governing the air medium in the internal combustion engine cylinder. The model geometry for the analysis was generated using the Ansys Design Modeller for one cylinder, one suction port and one exhaust port, and two valves. The domain considered is internal combustion engine suction port with 86741 nodes and 263155 elements. Study results revealed that air mass was more concentrated around the valve and inlet port cross-section with swirling motion seen, air stream experienced turbulence as it flowed downwards inside the cylinder, air stream spread was turbulent which will eventually enhance smooth combustion, swirling air stream moves towards the cylinder wall where it experienced tumbling and turbulent which will eventually enhance smooth combustion. From the simulation it was revealed that mass flow rate of inlet air increases with valve lift.
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5

Klas, Roman, and Simona Fialová. "Pulse flow of liquid in flexible tube." EPJ Web of Conferences 213 (2019): 02041. http://dx.doi.org/10.1051/epjconf/201921302041.

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The simulation of liquid flow in significantly deformed elastic material is one of the more challenging tasks. Tube wall motion prediction implemented directly into CFD software can noticeably reduce the computational and time demands of such problems. The FSI simulation of a liquid-flowed flexible plastic tube was analyzed on the FEA and CFD solvers coupling basis. The flexible tube is the basic symmetric test body that could be appropriately tested on the experimental stand. A comparison of experimental data and FSI problem using commercial code and one-dimensional tube models was made by evaluating the tube wall deformation magnitudes at defined flow ratios. The type of tube material, which can be understood as a nonlinear from the stress and deformation point of view, was considered. The paper shows several possibilities of tube modeling using the main constitutive relations of linear and nonlinear mechanics. The hyperelastic material models such as neo-Hookean and Mooney-Rivlin were tested. The results represent differences in impacts on the tube liquid flow and differences in the magnitudes of the wall tube deformations. Based on these findings it should be possible to simulate the problems of liquid flow in more complicated shape flow zones, such as arteries affected by various defects, in our future research.
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6

Wuwung, Vicky, Nelli Anggreyni, Valeri Maria Hitoyo, and Carolus Bintoro. "JUSTIFIKASI CFD KEDALAMAN GROOVE BAN PADA PROSES PERAWATAN HARIAN PESAWAT B737-800 AKIBAT HYDROPLANING (B737-800 TIRE GROOVE DEPTH CFD JUSTIFICATION ON ITS DAILY MAINTENANCE PROCESS DUE TO HYDROPLANING)." Jurnal Teknologi Dirgantara 15, no. 1 (December 14, 2017): 29. http://dx.doi.org/10.30536/j.jtd.2017.v15.a2528.

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As a reference in daily maintenace process of Boeing 737-800 air plane, The tire groove depth influence justification which is moving on the contaminated runway that could be potential to hydroplaning phenomenon must be reviewed. Tire groove is a pattern on the tire surface that has a function to flow the water in front of the tire to the aft of the tire smoothly through the bottom of the tire. This mechanism let the tire less of a lift force that can be meant as a hydroplaning prevention. To understand hydroplaning phenomenon and groove depth tire influence, a numerical simulation is performed by using a CFD software Numeca Fine/Marine. This simulation is 3D, unsteady fluid dynamic simulation, with an assumption a rigid body tire at a short time after the airplane touch down to the runway (after skidding process) with velocity V = 62.27 m/s. The contaminated runway is modelled as a pool water (flood) on the flat surface runway with its height of 2.54 mm. Numerical simulation on this B 737-800 tire result shows that a hydroplaning phenomenon will happen for tire with groove depth less than 0.4”. This concludes that a lesser groove depth of tire will reduce a tire groove cross sectional area, and will increase a compression force in the bottom at the front of the tire, that will result in increasing a lift force to the tire and finally increasing a chance to hydroplaning process. From this result, furthermore, the influence of this groove depth of B 737-800 tire variation that is run on a contaminated runway can be used as a reference on B 737-800 tire daily maintenance. AbstrakGroove atau ‘kembang” pada ban pesawat merupakan sarana untuk mengalirkan air dari bagian depan menuju bagian belakang melalui bagian bawah ban, tanpa mengangkat ban sehingga dapat mencegah terjadinya hydroplaning. Sehingga, pengaruh nilai kedalaman groove terhadap gaya angkat pada ban pesawat B737-800 yang bergerak di landasan dengan genangan air perlu dijustifikasi dalam proses perawatan harian. Penelitian ini menyimulasikan proses mengalirnya air pada bagian bawah ban dengan menggunakan simulasi numerik (CFD Numeca Fine/Marine) 3-D unsteady sebagai metode untuk menjustifikasi pengaruh groove. Simulasi dilakukan untuk kondisi gerakan ban pesawat pada saat proses landing (V = 62,275 m/s) beberapa saat setelah touch down (setelah skidding) dengan ban pesawat dianggap rigid body sebagai kondisi batas. Selanjutnya tinggi genangan air dipilih pada saat runway dinyatakan dalam kondisi flood (tinggi genangan air = 2,54mm). Simulasi tersebut menampilkan hasil perhitungan ban pesawat Boeing 737-800, dengan hydroplaning mulai terjadi ketika kedalaman groove ban berada dibawah 0,4 inch. Hal ini menunjukkan bahwa semakin kecil kedalaman groove, maka semakin kecil luas penampang groove dan semakin besar gaya kompresi yang terjadi pada bagian bawah ban dan semakin memperbesar kemungkinan terjadinya fenomena hydroplaning. Dengan diketahuinya hasil dari simulasi tersebut, maka hasil penelitian ini dapat digunakan sebagai masukan bagi proses maintenance harian pesawat B737-800 dan mampu memberikan suatu hal baru dalam pembelajaran khususnya mengenai fenomena hydroplaning.
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7

Azimi, Hamed, and Saeid Shabanlou. "Numerical Simulation of Free Surface and Flow Field Turbulence in a Circular Channel with the Side Weir in Subcritical Flow." International Journal of Nonlinear Sciences and Numerical Simulation 18, no. 3-4 (May 24, 2017): 255–67. http://dx.doi.org/10.1515/ijnsns-2016-0115.

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AbstractWhen flow surface is higher than of a side weir crest, the overflow spilt over the crest and divert into a side channel. These structures are extensively used in urban sewage disposal networks, water supply systems, and drainage and flood diversion networks. This study simulates stream free surface, discharge over a sharp-crest side weir, and discharge coefficient of a side weir in a circular channel using FLOW-3D software. Numerical model results were compared with the experimental ones and the comparison proved an acceptable consistency between the numerical and experimental results. RNG k-ε turbulence model was used for simulating flow turbulence. The volume of fluid (VOF) method was used in this CFD analysis for predicting changes of flow free surface. Then, the numerical simulation results were examined for discharge coefficient of the side weir and flow free surface for different discharge passing through the main channel. The changes of dividing stream surface from main channel bed toward stream free surface were examined. The concluding section assessed the effect of shape of a circular channel on the pattern and intensity of a secondary flow in the main channel and the impacts of the discharge passing through the circular channel on height of stagnation point and shear stress pattern in the main channel bed.
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8

Yuan, Wei Guo, and Ya Bin Wang. "Verification of Control System by Physical Simulation." Applied Mechanics and Materials 472 (January 2014): 389–93. http://dx.doi.org/10.4028/www.scientific.net/amm.472.389.

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Control system is generally verified by experiment, some of which are too difficult or high-cost to implement, while physical simulation can be substituted for experiment to verify the effectiveness of control system. The study take the heat exchanger as an example to describe the process of verification by physical simulation: Choose FLOEFD and SIMULINK as the software of physical simulation and control system design, establish the mathematical model of heat exchanger, design control module, whose output is set as an input of FLOEFD, compare the result of physical simulation and SIMULINK, if they are similar, the control module is effective.
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9

Hien, Le Thi Thu, and Nguyen Van Chien. "Investigate Impact Force of Dam-Break Flow against Structures by Both 2D and 3D Numerical Simulations." Water 13, no. 3 (January 30, 2021): 344. http://dx.doi.org/10.3390/w13030344.

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The aim of this paper was to investigate the ability of some 2D and 3D numerical models to simulate flood waves in the presence of an isolated building or building array in an inundated area. Firstly, the proposed 2D numerical model was based on the finite-volume method (FVM) to solve 2D shallow-water equations (2D-SWEs) on structured mesh. The flux-difference splitting method (FDS) was utilized to obtain an exact mass balance while the Roe scheme was invoked to approximate Riemann problems. Secondly, the 3D commercially available CFD software package was selected, which contained a Flow 3D model with two turbulent models: Reynolds-averaged Navier-Stokes (RANs) with a renormalized group (RNG) and a large-eddy simulation (LES). The numerical results of an impact force on an obstruction due to a dam-break flow showed that a 3D solution was much better than a 2D one. By comparing the 3D numerical force results of an impact force acting on building arrays with the existence experimental data, the influence of velocity-induced force on a dynamic force was quantified by a function of the Froude number and the water depth of the incident wave. Furthermore, we investigated the effect of the initial water stage and dam-break width on the 3D-computed results of the peak value of force intensity.
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Yang, Rong Zun, Xin Hua Wang, Dong Hu, and Li Wei Wang. "Leakage of Long-Distance Pipeline by FIOEFD Simulation and Indoor Experiment." Applied Mechanics and Materials 310 (February 2013): 362–67. http://dx.doi.org/10.4028/www.scientific.net/amm.310.362.

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Based on the established indoor experimental platform for the leakage of buried oil pipeline, the characteristics of leakage under varied transfer pressure have been studied and simulated according to the experimental model by using FLOEFD—an analysis software of fluid & heat transfer. By comparing and analyzing the result of simulation, experiment and applying correlate theory of fluid dynamics，the theoretical model is established.
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11

Gai, Ao. "Improving Aerodynamic Efficiency and Decreasing Drag Coefficient of an F1 in Schools Race Car." Modern Applied Science 15, no. 2 (March 29, 2021): 73. http://dx.doi.org/10.5539/mas.v15n2p73.

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To improve the aerodynamic efficiency of a Formula One (F1) in Schools race car, the original model of the car is evaluated and compared with a new design. The ideas behind the new design are supported by research about aerodynamics. Different potential designs are created with CAD software Fusion 360 and evaluated within CFD software Solid Edge 2020 with FloEFD. Empirical data shows how specific changes to the structure of race cars can improve aerodynamic efficiency by decreasing their aerodynamic drag. The experimental data and methods of this study can provide help and guidance for teenagers participating in the F1 in Schools competition program to solve the aerodynamic performance problems of racing cars and thereby increase youth interest in STEM programs, as well as their opportunities to learn about engineering and enter engineering careers.
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Zhao, Zhong Li, Bao Jun Zhou, Jian Zhuang, Da Ming Wu, Ya Jun Zhang, Xiu Ting Zheng, and Kai Fang Dang. "Design and Simulation Analysis of a New Type of Micro Metal-Plastic Heat Radiator." Key Engineering Materials 562-565 (July 2013): 1127–31. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.1127.

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With the development of micro-nanomachining technology (MNMT), micro heat radiator is getting attention. In this paper, the heat dissipation mechanism of light emitting diode (LED) ball lamp is introduced. And the LED heat radiator is simplified. On the basis of that, a new type of micro metal-plastic heat radiator of LED is put forward. And the LED heat radiator is simplified. A series of numerical simulations are carried out to compare the heat dissipation performance of micro heat radiator respectively made by metal, plastic, metal-plastic composite by the FloEFD software. Micro metal-plastic heat radiator structures, including fin spacing, fin thickness, fin height and substrate thickness, are carry out to be simulated.
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Sun, Howard, Yong Quan Zhou, and Yong Sheng Liang. "GPU Accelerated CFD Simulation in Electronics Cooling." Applied Mechanics and Materials 263-266 (December 2012): 1285–89. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.1285.

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CFD(Computer Fluid Dynamics) simulation is widely used in IT industry, it usually based on the latest CPU computing power and software technology, can easily take hours even days. A new 3D Navier-Stokes solver based on the SIMPLE algorithm but totally rewritten from ground up with Nvidia’s CUDA software programming API was studied by investigating the use of the latest GPU technology for an electronics cooling problem. The GPU accelerated CFD simulation by using massively parallel algorithm accelerated the calculation by 3.55 times.
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Lapuerta, C., S. Suard, F. Babik, and L. Rigollet. "Validation process of ISIS CFD software for fire simulation." Nuclear Engineering and Design 253 (December 2012): 367–73. http://dx.doi.org/10.1016/j.nucengdes.2011.09.068.

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Alexa, Vasile, Imre Kiss, and Sorin Raţiu. "Verofocation of Bernoulli Law using the Software Autodesk Simulation CFD." Analecta Technica Szegedinensia 8, no. 2 (May 12, 2014): 120–27. http://dx.doi.org/10.14232/analecta.2014.2.120-127.

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Using Fluid Dynamics Analysis (CFD) provides the opportunity to achieve a faster and more thorough study of fluid flow processes and is an important step to obtain information that cannot be obtained otherwise. The finite element method is generally more accurate than the finite volume method, but finite volume method can achieve more accurate mass balances using the balance sheet continuity per volume control. Finite volume method is more appropriate when fluid transport, while the finite element method is used more in the calculations of tension or conduction, which satisfies local continuity condition, is of less importance. Fluid Dynamics Analysis (CFD) is used in numerical analyzes, based on a set of mathematical expressions on linear complex equations defining fundamental fluid flow and heat transfer. This paper presents the simulation of air flow through a tube of special construction in interpreting the law of Bernoulli energy. Laboratory systems are shown, respectively simulating the actual fluid flow.
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Wang, Fei Yue, Yi Shun Zhang, Chang Liang Shi, Yuan Yang Liu, and Ling Zhang. "The Numerical Simulation Study of the Cone Hindered Settling Hydro-Sizer Based on CFD." Advanced Materials Research 807-809 (September 2013): 2340–44. http://dx.doi.org/10.4028/www.scientific.net/amr.807-809.2340.

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This paper use CFD software for geometric modeling and structural mesh for the Cone Hindered Settling Hydro-sizer and then apply the Fluent software for three-dimensional CFD simulation. Using RNG K-ε two-equation turbulence model and Swirl Dominated Flow model respectively, and the top speed of different feeding liquid two-phase flow of water under medium CFD numerical simulation results grader internal flow field characteristics.
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Jia, Wei Dong, Cheng Li, Jun Lu, Ning Yang, and Zhen Tao Wang. "CFD Simulation of Spraying with Air Jet." Advanced Materials Research 455-456 (January 2012): 228–33. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.228.

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Droplet drift is always an accompaniment of pesticide spraying and can cause serious consequences. In this paper, we used a computational fluid dynamics software package (FLUENT) to analyze flow fields of spraying with air jet under different conditions in the tunnel model, and compared the effect of air jet on spray deposition and drift. Results of this study indicate that air jet can act directly on the spray droplets and affect their distribution and movement. Larger jet velocity has better performance on the drift reduction and droplet deposition. Droplets in the flow fields with larger jet velocity can get more kinetic energy and arrive at the root of crops easilier. When droplets are released straight down, larger velocity of droplets can be given and better performance can be achieved either in terms of drift reduction or droplet deposition.
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Song, Jing, Wei He, Zhe Kun Li, and Wen Li Shi. "Particles Separation of Hydrocyclone Based on CFD Simulation." Applied Mechanics and Materials 535 (February 2014): 495–99. http://dx.doi.org/10.4028/www.scientific.net/amm.535.495.

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Analyzed the research status of hydrocyclone separation. By using CFD software, the important parameters of velocity and pressure in the hydrocyclone are analyzed and contrasted. Through simulation, it can accurately reflect the internal flow field, and can be used to predict the hydrocyclone separation performance. The results of flow field simulation will help to finish structure design of hydrocyclone and to provide the basis for the optimization design of hydrocyclone.
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NAKAGAWA, Shinji, Katsuhiro Koizumi, Tukasa TAKAMA, and Masaru ISHIZUKA. "1118 Simulation of Flow Soldering Process Using General-Purpose CFD Software." Proceedings of the JSME annual meeting 2008.6 (2008): 251–52. http://dx.doi.org/10.1299/jsmemecjo.2008.6.0_251.

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Craig, K., C. De Traversay, B. Bowen, K. Essemiani, C. Levecq, and R. Naylor. "Hydraulic study and optimisation of water treatment processes using numerical simulation." Water Supply 2, no. 5-6 (December 1, 2002): 135–42. http://dx.doi.org/10.2166/ws.2002.0161.

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Until recently, water treatment plants were frequently designed solely on the basis of the biological, chemical and physical constraints of processes. Nowadays, the use of Computational Fluid Dynamics (CFD) software enables the dimensioning of water treatment processes by taking into account the real hydraulic behaviour of processes. That has be done for the Coliban Water Aqua 2000 project, which consists of the construction of three water treatment plants. The disinfection performance of three ozone contactors were compared using the CFD software, Fluent. Moreover, the CFD application has been extended to a large range of water treatment processes in recent years. The paper presents several of these: flocculation tanks, UV reactors and secondary settling tanks.
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FAN, JIZHUANG, WEI ZHANG, YANHE ZHU, and JIE ZHAO. "CFD-BASED SELF-PROPULSION SIMULATION FOR FROG SWIMMING." Journal of Mechanics in Medicine and Biology 14, no. 06 (December 2014): 1440012. http://dx.doi.org/10.1142/s0219519414400120.

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Mechanism analysis of frog swimming is an interesting subject in the field of biofluid mechanics and bionics. Computing the hydrodynamic forces acting on a frog is difficult due to its characteristics of explosive propulsion and large range of joint motion. To analyze the flow around the body and vortices in the wake, in this paper, the method based on Computational Fluid Dynamics (CFD) was utilized to solve the velocity and pressure distributions in the flow field and on the frog. The hydrodynamic problem during the propulsive phase of a frog, Xenopus laevis, was calculated using the CFD software FLUENT. A self-propulsion simulation was performed which computed the body velocity from the joint trajectory input and CFD solved the hydrodynamic forces, and visual CFD results of the hydrodynamic forces and flow field structures were obtained.
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Zhao, Dong Fang, and Feng Guo Liu. "CFD Simulation of Gas Distributor with Two Chambers." Advanced Materials Research 989-994 (July 2014): 2264–67. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.2264.

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This paper investigated a new type of gas distributor with two chambers by CFD software. The distributor has a natural gas inlet and nine nozzle outlets. For the investigation of this project, the mass flow rate of the distributor was analyzed in this paper to provide a way to optimize the structure of distributor. The N-S equations approached with the RNG k-ε turbulence model and the discretization were employed second order upwind. The simulation results will provide a number of useful suggestions and references for the further design.
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Gonzales, Howell B., John Tatarko, Mark E. Casada, Ronaldo G. Maghirang, Lawrence J. Hagen, and Charles J. Barden. "Computational Fluid Dynamics Simulation of Airflow through Standing Vegetation." Transactions of the ASABE 62, no. 6 (2019): 1713–22. http://dx.doi.org/10.13031/trans.13449.

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Abstract. Maintaining vegetative cover on the soil surface is the most widely used method for control of soil loss by wind erosion. We numerically modeled airflow through artificial standing vegetation (i.e., simulated wheat plants) using computational fluid dynamics (CFD). A solver (simpleFoam within the OpenFOAM software architecture) was used to simulate airflow through various three-dimensional (3D) canopy structures in a wind tunnel, which were created using another open-source CAD geometry software (Salomé ver. 7.2). This study focused on two specific objectives: (1) model airflow through standing vegetation using CFD, and (2) compare the results of a previous wind tunnel study with various artificial vegetation configurations to the results of the CFD model. Wind speeds measured in the wind tunnel experiment differed slightly from the numerical simulation using CFD, especially near positions where simulated vegetation was present. Effective drag coefficients computed using wind profiles did not differ significantly (p <0.05) between the experimental and simulated results. Results of this study will provide information for research into other types of simulated stubble or sparse vegetation during wind erosion events.HighlightsMeasured airflow through a simulated canopy was successfully modeled using CFD software.Effective drag coefficients did not differ between the experimental and simulated results.Results of this study provide 3-D simulation data of wind flow through a plant canopy. Keywords: 3-D canopy structure, OpenFOAM, Wind erosion, Wind tunnel studies.
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Liu, Xiao Lei, Xue Wei Liu, Li Min Song, Dun Jin, and Yuan Kai Li. "Simulation of Drag Reduction Mechanism of the Wing Tip." Applied Mechanics and Materials 602-605 (August 2014): 295–98. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.295.

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In this paper, the international common CFD software were installed on the flat three-dimensional optimal design wing tip and winglet wing for three-dimensional simulation, and use the results post-processing software post-processing.
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Wu, Yuan Ze, Yi Sun, Hai Tao Shi, and Bai Feng Ji. "Study on Downburst Wind Load under Characteristic Topography." Applied Mechanics and Materials 580-583 (July 2014): 2958–61. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.2958.

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Gemorphological type is the important factor influencing the downburst wind profile. In this thesis, firstly we determine four categories of landform types under the criteria of roughness. The CFD pre-processing software GAMBIT was used to build considering the landscape type's downburst CFD computational model. Then, the established CFD computational model was imported to the calculated hydrodynamics software FLUENT to take the numerical simulation of the downburst under different landforms. Finally, in allusion to the numerical simulation result, make the research of the wind characteristics.
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Zhou, Kan, Ge Huang, Bin Liu, and Qi Hu. "Numerical Simulation and Analysis of External Flow Field of the Van." MATEC Web of Conferences 293 (2019): 01001. http://dx.doi.org/10.1051/matecconf/201929301001.

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This paper uses CFD preprocessing software to build Van model and gridding it, then CFD software is used to simulation the outflow field of Van model, from which the distribution of pressure and velocity is obtained and the outflow field is analyzed. The calculation results indeed reflect the aerodynamic characteristics of the external flow field of the van, and the flow movement on the van surface is better simulated. In addition, the positions where the vortex motion is relatively severe are also found
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Davidy, Alon. "CFD Simulation of Forced Recirculating Fired Heated Reboilers." Processes 8, no. 2 (January 22, 2020): 145. http://dx.doi.org/10.3390/pr8020145.

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An advanced algorithm has been developed in order to analyze the performance of re-boiling process of crude oil flowing inside reboilers tubes. The proposed model is composed from Heptane fire heater and a tube array. The heat flux produced from burner is transferred to the crude oil flowing inside the tube. The computational model is composed of two phases—Simulation of fire by using Fire Dynamics Simulator software (FDS) version 5.0 and then a nucleate boiling computation of the crude oil. FDS code is formulated based on CFD (Computational Fluid Dynamics) of fire heater. The thermo-physical properties (such as: thermal conductivity, heat capacity, surface tension, viscosity) of the crude oil were estimated by using empirical correlations. The thermal heat transfer to evaporating two-phase crude oil mixture occur by bubble generation at the wall (nucleate boiling) has been calculated by using Chen correlation. It has been assumed that the overall convective heat transfer coefficient is composed from the nucleate boiling convective coefficient and the forced turbulent convective coefficient. The former is calculated by Forster Zuber empirical equation. The latter is computed from the Dittus-Boelter relationship. In order to validate the nucleate boiling heat transfer coefficient, a comparison has been performed to nucleate boiling convective coefficient obtained by Mostinski equation. The relative error between the nucleate boiling convective heat-transfer coefficients is 10.5%. The FDS numerical solution has been carried out by using Large Eddy Simulation (LES) method. This work has been further extended to include also the structural integrity aspects of the reboiler metal pipe by using COMSOL Multiphysics software. It was found out, that the calculated stress is less than the ultimate tensile strength of the AISI 310 Steel alloy.
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Okafor, Chinedum Vincent, U. John Ezeokonkwo, Dominic Anosike Obodoh, and Peter Ogunoh. "Atmospheric Boundary Layer Simulation Using Wall Function Approach in OpenFoam CFD Software." European Journal of Engineering Research and Science 3, no. 2 (February 6, 2018): 1. http://dx.doi.org/10.24018/ejers.2018.3.2.597.

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The significant development in computer resources in the past years has increased the awareness of computational fluid dynamics as an alternative tool to the costly wind tunnel testing. The paper presented the application of CFD technique for a case study in simulating an existing site together with a proposed building and the local landscape. Finally, the limitations of the code analytical methods to the CFD method for wind around building analysis were discussed. From the result obtained, it was observed that the British standard (BS6399-2:1997) procedures are based on general assumptions and are not always conservative and do not provide accurate wind load results due to complex geometrical shapes, aerodynamic interaction, torsion, and load combinations as discussed in section VII.
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Bin, Sun, and Jiu Ling Zhang. "CFD Simulation of Capillary Network Radiation Heating Comfort." Applied Mechanics and Materials 672-674 (October 2014): 1748–54. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.1748.

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In order to study the effect on indoor thermal comfort when capillary network radiation heating is in diffrent locations, and make capillary network apply to civil construction in the best location. According to the Airpak software,we perform a bedroom thermal environment CFD simulation when capillary network is in three different locations, from which,we get the temperature field, the velocity field and the PMV images. Come to a conclusion,when the capillary network laying on the floor, the temperature distribution is most uniform, the human body comfort is best; when laying on the wall, the heat transfer performance is the best, and get a highest temperature;when laying on the ceiling, the temperature gradient in vertical direction is 0.37 °C /m,the temperature of upside is warmer than downside .
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Ali, Majid, Chang Qi Yan, Zhong Ning Sun, Jian Jun Wang, and Athar Rasool. "CFD Simulation of Throat Pressure in Venturi Scrubber." Applied Mechanics and Materials 170-173 (May 2012): 3630–34. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.3630.

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In nuclear power plant (NPP), particulate matter and gaseous pollutant release into the environment in severe accidents. To prevent from this disaster, filtered vented containment system (FVCS) containing venturi scrubber is being installed. The present work herein is the CFD simulation of throat pressure in venturi scrubber. A commercial software ANSYS CFX tool has been selected for this research. Euler-Euler regime is used to get the picture of behavior of fluid dynamics inside the venturi scrubber. Gas and liquid interact with each other in throat section of venturi scrubber. The pressure at the throat is one of the important factors to analyze the performance of venturi scrubber. In order to verify the results, mesh independency is checked. CFX and experimental results show good agreement with each other. The results obtained from CFX simulation are useful to improve the venturi design.
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Ren, Xiao Guang, Yu Hua Tang, and Xin Hai Xu. "Format Optimization for Periodical Snapshot Output in CFD Simulation." Applied Mechanics and Materials 457-458 (October 2013): 910–18. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.910.

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Computational Fluid Dynamics (CFD) simulation often needs to periodically output the intermediate results to files in the form of snapshots for visualization or restart, which seriously impacts the performance. Traditional CFD simulation takes ASCII format with typesetting in the snapshot output process, which results in precision loss of the data in the snapshot array and more storage space occupancy than the original binary format. In this paper, we propose the binary non-typesetting format optimization for the snapshot output in CFD simulation, aiming at eliminating the impact of ASCII format. In our optimization method, the snapshot array is output in binary format without typesetting. On one hand, it reserves the original binary precision in the output files, while the ASCII format always has precision loss, which seriously impacts the accuracy of CFD simulation; On the other hand, non-typesetting provide the opportunity of output the snapshot as a continuous memory block, which will signally improve the efficiency of the output. We design the multiply output mode framework for CFD applications through the combination of ASCII typesetting format and binary non-typesetting format. We implement this multiply output mode framework in the open source CFD software OpenFOAM. Experimental results on Tianhe-2 supercomputer demonstrate that our binary non-typesetting format optimization technique can achieve good optimization effect for the periodical snapshot output in CFD application.
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32

Zhao, Yang, Jie Jin, and Jiang Fan. "Research on Multi-Solver Simulation Interface of Aero-Engine Compressor." Applied Mechanics and Materials 404 (September 2013): 331–36. http://dx.doi.org/10.4028/www.scientific.net/amm.404.331.

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Establish a CFD simulation interface for compressor aerodynamic analysis based on general CFD software. The simulation interface includes data format, process and interface standard. Data format based on CGNS is built for cross-platform restoring and retrieving mass data. The designing of process references the process of general CFD analysis and the compressor aerodynamic analysis. The interface standard is used to import and the parameters and export them into corresponding profiles according to the demand of different computation modules. Validation results for the simulation interface using a single-stage transonic axial compressor fan ATS-2 shows that the setting process is more convenient and achieves a certain degree of automation.
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33

Ancas, Ana Diana, Florin-Emilian Turcanu, Mihai Profire, Marina Verdes, and Marius Costel Balan. "Indoor Climate Simulation in a Church During Winter Season." Journal of Applied Engineering Sciences 9, no. 1 (May 1, 2019): 25–28. http://dx.doi.org/10.2478/jaes-2019-0003.

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Abstract In the paper is presented a heating system installed in church and the interior climate generated. Thermal Comfort is the purpose of each designer, since the design stage and has to be ensure for the churchgoers, but even for the interior finishes. The heating system that uses hydronic radiators is evaluated trough the CFD modelling, in order to evaluate pro and contra arguments. The simulation has been made in a 3d simulation software environment, in Autodesk CFD with good results.
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Scurtu, Ionut Cristian, and Valeriu Nicolae Panaitescu. "Turbulent Flow Numerical Simulation for Unconventional Propulsion." Revista de Chimie 70, no. 10 (November 15, 2019): 3508–11. http://dx.doi.org/10.37358/rc.19.10.7585.

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This paper presents mainly a new HPC/CFD numerical simulation for airflow around the rigid sail for Lupo90 boat in Constanta harbor conditions. The first part of the work displays the performed numerical simulation in turbulent flow based on the 3D sail. The presented model has high capacity of towing and it can be installed onboard existing ships. This is the result of the HPC (high performance computing) and CFD (computational fluid dynamics) which is a mixture of actual hardware and software at high level computing power applied to Lupo90 boat. All data for rigid sail is analyzed in a turbulent flow in commercial fluid dynamics ANSYS module CFX available at Naval Academy and the work was supported by Romanian Ministry of Defense. Sail performance studying in turbulent flow for the rigid sail onboard ships was always a huge computational difficulty and the HPC/CFD analysis available can solve tricky tasks. The most common unconventional systems are hybrid propulsion systems are using fossil fuel and wind energy, this type of HPC/CFD method for propulsion investigation is now implemented by craft constructor CirusPlast SRL.
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35

Pan, Xian Feng, and Wei Wu Cao. "Car Radiator of the Whole Simulation Based on CFD." Applied Mechanics and Materials 556-562 (May 2014): 1236–40. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1236.

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in this paper the temperature and the flow field of the radiator use CFDESIGN software test has carried on the simulation calculation of the radiator, the radiator heat transfer analysis of the whole calculation data and the details of the internal flow in a heat dissipation unit.And data obtained can be in normal acceptable error range, so this paper uses the algorithm is correct and available.This paper summarizes a series of radiator simulation steps, for the following radiator optimization design is proposed to write a set of scientific method.
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36

Li, Mengxi, Xinfa Qiu, Juanjun Shen, Jinqin Xu, Bo Feng, Yongjian He, Guoping Shi, and Xiaochen Zhu. "CFD Simulation of the Wind Field in Jinjiang City Using a Building Data Generalization Method." Atmosphere 10, no. 6 (June 16, 2019): 326. http://dx.doi.org/10.3390/atmos10060326.

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The urban wind environment is an important element of urban microclimates and plays an important role in the quality of the urban environment. The computational fluid dynamics (CFD) simulation method is an important means for urban wind field research. However, CFD simulation has high requirements for computer hardware and software. In this paper, based on geographic information system (GIS) technology, a new building data generalization method was developed to solve the problems of a huge amount of data and calculations in urban-scale CFD wind field simulations. Using Fluent software and high-precision urban building geographic information data with elevation attributes, the method was applied to Jinjiang City, Fujian Province, China. A CFD simulation of the wind field of Jinjiang City was implemented, and detailed, intuitive wind field information was obtained, which were compared with the measured data. The results show that the building data generalization method could effectively improve the efficiency of the city's overall wind field CFD simulation. The simulated wind speed was significantly correlated with the measured data, but it was overestimated. The simulated wind direction was consistent with the measured data of most stations. The simulation results were reasonable and could provide reference for application and subsequent research.
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37

Wang, Jianfeng, Hao Li, Yiqun Liu, Tao Liu, and Haibo Gao. "Aerodynamic research of a racing car based on wind tunnel test and computational fluid dynamics." MATEC Web of Conferences 153 (2018): 04011. http://dx.doi.org/10.1051/matecconf/201815304011.

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Wind tunnel test and computational fluid dynamics (CFD) simulation are two main methods for the study of automotive aerodynamics. CFD simulation software solves the results in calculation by using the basic theory of aerodynamic. Calculation will inevitably lead to bias, and the wind tunnel test can effectively simulate the real driving condition, which is the most effective aerodynamics research method. This paper researches the aerodynamic characteristics of the wing of a racing car. Aerodynamic model of a racing car is established. Wind tunnel test is carried out and compared with the simulation results of computational fluid dynamics. The deviation of the two methods is small, and the accuracy of computational fluid dynamics simulation is verified. By means of CFD software simulation, the coefficients of six aerodynamic forces are fitted and the aerodynamic equations are obtained. Finally, the aerodynamic forces and torques of the racing car travel in bend are calculated.
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38

Qiu, Lin, Min Yan, and Song Lu. "CFD Simulation on the Phase Change Storage Energy Materials." Applied Mechanics and Materials 66-68 (July 2011): 396–400. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.396.

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This paper studied a phase change process of phase change material (PCM) application building energy storage by CFD software. Set up the phase change process physics model consideration natural convection, the phenomenon of heat transfer from phase change and the impact of rules have been discussed, the proportion of solid and liquid of the process of phase change, the time of phase change, the interface of phase change and motion temperature image of liquid-region carried out numerical simulation. The results show that the natural convection generates the circumfluence at the liquid state of the phase change process, it takes on the role of accelerating the melt and reducing the solidification.
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39

Młynarczyk, Przemysław. "The influence of the numerical solver selection on the nozzle impulse flow simulation results." MATEC Web of Conferences 240 (2018): 03008. http://dx.doi.org/10.1051/matecconf/201824003008.

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Numerical simulations are currently used for different applications in a various fields of science. Certain solutions are not as obvious as the others while the results can give very valuable conclusions. Computational Fluid Dynamics (CFD) is one of the tools that can be used to solve different problems related with the mass and heat transfer. Nowadays it is already known that the impulse flow simulation allows to determine pressure pulsation attenuation parameters by a given geometry. However, the nozzle shape optimization method strongly depends on the numerical results obtained from the impulse flow simulation. In commercial CFD software Ansys-Fluent the obtained results depends strongly on the chosen numerical methods, especially the spatial discretization method. This is the reason to use other software as a benchmark. Alternative software FlowVision was used to perform the impulse flow simulation for the same geometries to compare the results. As there is a different problem definition in both systems the calculations, accuracy and results differ from each other. The paper describes the numerical differences between solvers. Article contains discussion about obtained results and includes hints how to avoid mistakes when user change software, especially in solving unusual CFD problems.
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40

Xu, Qing, Yu-Xing Li, Xiao-Ning Li, Jia-Bin Wang, Fan Yang, Yi Yang, and Tian-Ling Ren. "Simulation of SiO2 etching in an inductively coupled CF4 plasma." Modern Physics Letters B 31, no. 06 (February 28, 2017): 1750042. http://dx.doi.org/10.1142/s0217984917500427.

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Plasma etching technology is an indispensable processing method in the manufacturing process of semiconductor devices. Because of the high fluorine/carbon ratio of CF4, the CF4 gas is often used for etching SiO2. A commercial software ESI-CFD is used to simulate the process of plasma etching with an inductively coupled plasma model. For the simulation part, CFD-ACE is used to simulate the chamber, and CFD-TOPO is used to simulate the surface of the sample. The effects of chamber pressure, bias voltage and ICP power on the reactant particles were investigated, and the etching profiles of SiO2 were obtained. Simulation can be used to predict the effects of reaction conditions on the density, energy and angular distributions of reactant particles, which can play a good role in guiding the etching process.
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41

Rosa, Henrique M. P., and Bruno S. Emerick. "CFD simulation on centrifugal pump impeller with splitter blades." Revista Brasileira de Engenharia Agrícola e Ambiental 24, no. 1 (January 2020): 3–7. http://dx.doi.org/10.1590/1807-1929/agriambi.v24n1p3-7.

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ABSTRACT The present paper aims to present the analysis and comparison of results of computational simulations using Computational Fluids Dynamics (CFD) in impellers of centrifugal pump. Three impellers were simulated: 1) original impeller, 2) original impeller with splitter blades at outlet; 3) original impeller with splitter blades at inlet. The splitters occupied 30% of the length of the main blades. They were simulated using the ANSYS-CFX software system in 1500 rpm rotational speed and at different flow rates. The turbulence model assumed was the Shear Stress Transport (SST). The results were used to build impeller blade head curves, besides the presentation of pressure distribution and streamline behaviour inside the impeller. It was verified that the insertion of the splitter blades reduced the impeller blade head, mainly the impeller with outlet splitter, whose reduction was more intense.
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42

Šulc, Stanislav, Vit Šmilauer, Bořek Patzák, Kamila Cábová, and František Wald. "Linked simulation for fire-exposed elements using CFD and thermo-mechanical models." Advances in Engineering Software 131 (May 2019): 12–22. http://dx.doi.org/10.1016/j.advengsoft.2019.02.007.

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43

Yun-ya, Liu, Yu-chen Yang, and Ya-wen Yang. "Simulation of vertical tidal turbine based on OpenFOAM and influence of inlet turbulence." MATEC Web of Conferences 272 (2019): 01017. http://dx.doi.org/10.1051/matecconf/201927201017.

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This paper first introduces the basic theory of CFD method, including basic control equations, finite volume method, control equation solving algorithm and turbulence model selection. Second, based on OpenFOAM, an open-source fluid mechanics software, a numerical simulation method of vertical axis tidal turbine was proposed by using k-ω SST turbulence model and PIMPLE algorithm. The hydrodynamic characteristics of the vertical axis turbine were studied, and the calculation results were compared with experiments. The higher consistency proves the feasibility of the numerical simulation method proposed in this paper. Finally, the influence of inlet turbulence on numerical simulation was explored, and a set of effective CFD simulation strategies was concluded, which provided a valuable reference for future CFD simulation and research on vertical axis tidal turbines.
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44

Liu, Bin, Xue Wu, Jing Wang, and Tao Feng. "New Type Homogenizing Valve: Flow Patterns Simulation." Applied Mechanics and Materials 364 (August 2013): 81–86. http://dx.doi.org/10.4028/www.scientific.net/amm.364.81.

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Homogenization is important in modern chemical, pharmaceutical and food industry. The design and optimization for homogenizing units are usually difficult because of lacking enough information about the flow field within the valve. Numerical investigations on flow and pressure fields within a kind of new type homogenizing valve have been conducted using computational fluid dynamics (CFD) software. The study indicates that the new type homogenizing valve can be modeled by CFD and detailed information on high speed flow is available. During the process on numerical simulation, finite-volume technique and RNG k-ε turbulence model are present. Through numerical results, mechanical stresses, high shear rates in small valve region and those phenomena that could not be easily determined experimentally can be reached.
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45

Krauze, Andrzej. "The application of CFD software in the explosive hazardous area classification." MATEC Web of Conferences 247 (2018): 00053. http://dx.doi.org/10.1051/matecconf/201824700053.

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This article is devoted to the practical application of CFD Computational Fluid Dynamics software, as a tool helpful in the explosive hazardous area classification. The practical examples will be discussed, which show that use of computer software for the simulation of gas emissions or the simulation of vapors of flammable liquids, allows not only visualization, but also improvement the quality of following conclusions received during the explosive hazardous area classification. The Computational Fluid Dynamics is a branch of physics which deals with solving transport equations for given boundary conditions using numerical methods. The solution is found by dividing the analyzed space into a specified number of small control volumes (cells). At the same time, time period is divided into short steps. Then, for each of the cells at each time step, the transport equations are converted into the system of linear equations. Such systems are solved using appropriate numerical algorithms.
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46

Guo, Chun Mei, Ying Shuang Bai, and Wei Li. "Coupled Simulation and Analysis of Wind Environment Around Buildings." Advanced Materials Research 953-954 (June 2014): 497–500. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.497.

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The wind environment of a district is calculated and analyzed with numerical simulation by CFD software Fluent. It analyzed concretely the air flow pattern around buildings and velocity profile, in order to provide a theoretical basis for the utilization of buildings wind power.
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47

Ren, Jia Wei, Qin Yu Jiang, and Zhen Wang. "CFD Simulation and Computation of Pressure Loss of Resistance Muffler." Advanced Materials Research 694-697 (May 2013): 307–11. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.307.

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Computational fluid dynamics (CFD) software was used to simulate the internal flow field of an example muffler, and compared the results with the experimental data, verifying the reliability of the simulation algorithm. On this basis, changed the example muffler structure, researched the pressure loss of muffler which was influenced by the insert duct, the position of the baffle and the inlet air velocity. The corresponding regularities have been obtained with the results of computations, which provide a basis for the design of the muffler.
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48

Кирик, Екатерина Сергеевна, Кирилл Юрьевич Литвинцев, Артур Александрович Тумановский, and Алексей Юрьевич Шебеко. "CFD software FDS for fire simulation and its application for fire risk assessment." Pozharnaia bezopasnost`, no. 2(99) (June 18, 2020): 14–27. http://dx.doi.org/10.37657/vniipo.2020.99.2.001.

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Статья посвящена особенностям моделирования развития пожара с помощью гидродинамической (полевой) модели. Анализируется программное обеспечение FDS версий 5 и 6. Рассматриваются настройки «по умолчанию» в программе, которые часто используются без изменений при проведении расчетов по оценке пожарного риска, и их соответствие положениям методик определения расчетной величины пожарного риска. Приведены результаты парных расчетов, иллюстрирующие влияние рассмотренных параметров на время блокирования путей эвакуации и на совместный анализ результатов моделирования развития пожара и эвакуации. The article deals with fire spread simulations by CFD-method using software package FDS version 5 and 6. There is systematically compared a number of configuration parameters of the software package to show how the default configuration parameters derive deviate solution from solution under the fire risk assessment methodology [1, 2] driven settings. The expected (control) results are calculated using FDS software by tweaking the configuration parameters to match the local fire risk assessment methodology [1, 2]. There are shown the worked out examples illustrating the difference in the gas dynamics subject to configuration settings when the default configuration parameters do not match the methodology. The characteristics of the physical phenomena subject to configuration parameters were discussed. There is derived the difference between times when the critical value for visibility distance is reached under the default value of visibility factor and methodology-driven visibility factor. There are given dramatically different numerical results using the isothermal (the default) and adiabatic (methodology-driven) boundary conditions for the heat transfer through walls. It is shown that the gas flows are too slow under the isothermal boundary conditions, and the dangerous fire factors reach its critical values much slower in comparison with the solution under the adiabatic boundary conditions. It is proved that the thermophysical characteristics of the fire process predicted by the FDS subject to its default configuration settings do not match the methodology and the reason is connected with a method to input data concerning thermal parameters (heat release rate, mass loss rate, heat of combustion). The numerical realization of the FDS does not simulate the fire from the first time steps of the simulation process (heat release rate and other fire parameters are equal zero). There is presented the formula for calculating the moment when the simulated fire begins. It is time to start evacuation.
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Liu, Xiazhen, Zhonghua Lu, Wu Yuan, Wenpeng Ma, and Jian Zhang. "Massively Parallel CFD Simulation Software: CCFD Development and Optimization Based on Sunway TaihuLight." Scientific Programming 2020 (July 22, 2020): 1–17. http://dx.doi.org/10.1155/2020/8847481.

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A parallel framework software, CCFD, based on the structure grid, and suitable for parallel computing of super-large-scale structure blocks, is designed and implemented. An overdecomposition method, in which the load balancing strategy is based on the domain decomposition method, is designed for the graph subdivision algorithm. This method takes computation and communication as the limiting condition and realizes the load balance between blocks by dividing the weighted graph. The fast convergence technique of a high-efficiency parallel geometric multigrid greatly improves the parallel efficiency and convergence speed of CCFD software. This paper introduces the software structure, process invocations, and calculation method of CCFD and introduces a hybrid parallel acceleration technology based on the Sunway TaihuLight heterogeneous architecture. The results calculated by Onera-M6 and DLR-F6 standard model show that the software structure and method in this paper are feasible and can meet the requirements of a large-scale parallel solution.
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50

Wang, Yi Fei, Zhong De Shan, Hao Qin Yang, Yong Xin Ren, and Ling Han Meng. "Research on Thermal Inkjet Technology Based on CFD." Materials Science Forum 1032 (May 2021): 101–7. http://dx.doi.org/10.4028/www.scientific.net/msf.1032.101.

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In this paper, a thermal inkjet printing simulation model is established in the CFD simulation platform, and the influence of inkjet driver parameters and ink physical parameters on the printing process is studied by numerical simulation. The evaporation-condensation model is coupled with the VOF multiphase flow model in Fluent software to establish a thermal inkjet printing process simulation model. Based on the orthogonal test method, we investigate the influence of fluid physical parameters (ink viscosity, surface tension) and inkjet driver parameters (heater temperature value) on droplet formation by changing the physical parameters of the material and the boundary conditions of the model. Through the comparison of the results, exploring the adjustment rules of thermal inkjet technology and obtaining the optimal combination of material and process parameters for high-quality ink drop formation.
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