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Artykuły w czasopismach na temat „Fluid dynamics – Computer simulation”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 29 stycznia 2023

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1

Li, Lei, Carlos F. Lange, and Yongsheng Ma. "Association of design and computational fluid dynamics simulation intent in flow control product optimization." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 232, no. 13 (March 14, 2017): 2309–22. http://dx.doi.org/10.1177/0954405417697352.

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Computational fluid dynamics has been extensively used for fluid flow simulation and thus guiding the flow control device design. However, computational fluid dynamics simulation requires explicit geometry input and complicated solver setup, which is a barrier in case of the cyclic computer-aided design/computational fluid dynamics integrated design process. Tedious human interventions are inevitable to make up the gap. To fix this issue, this work proposed a theoretical framework where the computational fluid dynamics solver setup can be intelligently assisted by the simulation intent capture

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S. Hussein, Suhad. "A Computer Simulation Study of High Pressure Processing of Liquid Food Using Computational Fluid Dynamics." International Journal of Modeling and Optimization 5, no. 1 (February 2015): 78–81. http://dx.doi.org/10.7763/ijmo.2015.v5.440.

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Wu, Enhua, Hongbin Zhu, Xuehui Liu, and Youquan Liu. "Simulation and interaction of fluid dynamics." Visual Computer 23, no. 5 (March 27, 2007): 299–308. http://dx.doi.org/10.1007/s00371-007-0106-y.

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Drikakis, Dimitris, Michael Frank, and Gavin Tabor. "Multiscale Computational Fluid Dynamics." Energies 12, no. 17 (August 25, 2019): 3272. http://dx.doi.org/10.3390/en12173272.

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Computational Fluid Dynamics (CFD) has numerous applications in the field of energy research, in modelling the basic physics of combustion, multiphase flow and heat transfer; and in the simulation of mechanical devices such as turbines, wind wave and tidal devices, and other devices for energy generation. With the constant increase in available computing power, the fidelity and accuracy of CFD simulations have constantly improved, and the technique is now an integral part of research and development. In the past few years, the development of multiscale methods has emerged as a topic of intensi

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Schlijper, A. G., C. W. Manke, W. G. Madden, and Y. Kong. "Computer Simulation of Non-Newtonian Fluid Rheology." International Journal of Modern Physics C 08, no. 04 (August 1997): 919–29. http://dx.doi.org/10.1142/s0129183197000795.

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Dissipative Particle Dynamics (DPD) is a new simulation technique that focuses on intermediate time and length scales. With this technique it is possible to simulate the essential aspects of the rheological behavior of polymeric liquids quite efficiently. Model studies show that DPD reveals the expected shear thinning and normal stress effects. We also show that the effects of thermodynamic solvent quality on the configurations and rheological behavior of dissolved polymers can be studied with the DPD model.

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Kraváriková, Helena. "Computer Modeling Application of Fluid Outflow from Vessels." Materials Science Forum 952 (April 2019): 250–57. http://dx.doi.org/10.4028/www.scientific.net/msf.952.250.

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The aim of the paper is to evaluate numerical analysis of the fluid flow during the outflow from vessel orifices at various locations. The problems of the outflow velocities and pressure fields were well-chosen for the given purposes. The selected fluid flow problems were solved by numerical simulation using FEM in ANSYS. For numerical simulation, we used the basic steps to design an abstract model in the ANSYS virtual environment. Numerical simulation requires a geometric model complemented by physical properties of flowing fluids as well as both the initial and boundary conditions. It is the

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7

AGISHTEIN, M. E., and A. A. MIGDAL. "COMPUTER SIMULATION OF THREE-DIMENSIONAL VORTEX DYNAMICS." Modern Physics Letters A 01, no. 03 (June 1986): 221–30. http://dx.doi.org/10.1142/s0217732386000312.

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The discrete model, approximating with exponential accuracy the set of interacting closed vortex lines in an ideal fluid, is proposed and investigated by means of the computer. The vortex lines move in their own velocity field according to the Biot-Savart law. This is a generalized Hamiltonian system possessing in addition an infinite number of conservation laws. Nevertheless, the motion becomes stochastic for certain initial conditions, and may be interpreted as marking the onset of turbulence.

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Zhu, Likuan, Boyan Song, and Zhen Long Wang. "Computational Fluid Dynamics Analysis on Rupture of Gas Bubble." Applied Mechanics and Materials 339 (July 2013): 468–73. http://dx.doi.org/10.4028/www.scientific.net/amm.339.468.

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Hydrodynamic information of the flow occurring as a bubble ruptures at a gas liquid interface has being obtained from computer simulations. The simulation result is verified by conducting high-speed photography experiment. Process of bubble rupture is clearly captured with simulation and experiment. Shear force generated by bubble rupture increases along with decrease of bursting bubble diameter or increase of coefficient of surface tension. The maximum average shear force ranges from 0.97Pa to 1.91Pa, when bursting bubble diameter changes from 2mm to 10mm.

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9

Leoveanu, Ioan Sorin, Kamila Kotrasova, and Eva Kormaníková. "Using of Computer Fluid Dynamics in Simulation of the Waste Reserviors Processes." Advanced Materials Research 969 (June 2014): 351–54. http://dx.doi.org/10.4028/www.scientific.net/amr.969.351.

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The paper scope consists in using the computational fluid dynamics for the simulation of waste reservoirs processes like the flood filling regime, flow over the dam in flood filling, and earthquake disaster. The flood regime may induce a particularly dynamics pressure on the dam walls and a particularly distribution of fluid flow inside liquid. On the other hand, when the disaster like earthquake occurs, the fluid dynamics and the induced pressures on the dam walls become extremely important for safety estimation of critical components. The dam break case is extremely important in management o

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10

Umbarkar, Tejas S., and Clement Kleinstreuer. "Computationally Efficient Fluid-Particle Dynamics Simulations of Arterial Systems." Communications in Computational Physics 17, no. 2 (January 23, 2015): 401–23. http://dx.doi.org/10.4208/cicp.160114.120914a.

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AbstractRealistic and accurate computer simulations of the particle-hemodynamics in arterial systems can be a valuable tool for numerous biomedical applications. Examples include optimal by-pass grafting and optimal drug-delivery, as well as best medical management concerning the cardio-vascular system. However, such numerical analyses require large computer resources which may become prohibitive for extended sets of arterial bifurcations. A remedy is to develop a hybrid model where the first few generations of the bifurcating arteries of interest are simulated in full 3-D, while a 1-D model i

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11

Sandrakov, G. V. "COMPUTATIONAL ALGORITHMS FOR MULTIPHASE HYDRODYNAMICS MODELS AND FILTRATION." Journal of Numerical and Applied Mathematics, no. 1 (2022): 46–61. http://dx.doi.org/10.17721/2706-9699.2022.1.04.

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Computational algorithms for modeling of multiphase hydrodynamics processes with take of phase transitions will be discussed. The algorithms are based on discretization of conservation laws for mass, momentum, and energy in integral and differential forms. The time and spatial discretization is natural and numerical simulations are realized as direct computer experiments. The experiments are implemented as a computer simulation of the dynamics of a multiphase carrier fluid containing particles that can undergo, for example, graphite–diamond phase transitions and calculations are given. Modific

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12

Wang, Xiaokun, Yanrui Xu, Xiaojuan Ban, Sinuo Liu, and Yuting Xu. "A Unified Multiple-Phase Fluids Framework Using Asymmetric Surface Extraction and the Modified Density Model." Symmetry 11, no. 6 (June 2, 2019): 745. http://dx.doi.org/10.3390/sym11060745.

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Multiple-phase fluids’ simulation and 3D visualization comprise an important cooperative visualization subject between fluid dynamics and computer animation. Interactions between different fluids have been widely studied in both physics and computer graphics. To further the study in both areas, cooperative research has been carried out; hence, a more authentic fluid simulation method is required. The key to a better multiphase fluid simulation result is surface extraction. Previous works usually have problems in extracting surfaces with unnatural fluctuations or detail missing. Gaps between di

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13

Nagaso, Masaru, Joseph Moysan, Christian Lhuillier, and Jean-Philippe Jeannot. "Simulation of Fluid Dynamics Monitoring Using Ultrasonic Measurements." Applied Sciences 11, no. 15 (July 30, 2021): 7065. http://dx.doi.org/10.3390/app11157065.

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The simulation of the propagation of ultrasonic waves in a moving fluid will improve the efficiency of the ultrasonic flow monitoring and that of the in-service monitoring for various reactors in several industries. The most recent simulations are mostly limited to 3D representations of the insonified volume but without really considering the temporal aspect of the flow. The advent of high-performance computing (HPC) now makes it possible to propose the first 4D simulations, with the representation of the inspected medium evolving over time. This work is based on a highly accurate double simul

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14

Mannan, Mohammed Abdul, and Dr Md Fakhruddin H. N. "Computational Fluid Dynamics in Coronary and Intra-Cardiac Flow Simulation." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (July 31, 2022): 688–93. http://dx.doi.org/10.22214/ijraset.2022.45280.

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Abstract: Computational fluid dynamics (CFD) is a field of mechanical engineering for the analysis of fluid flows, heat transfer, and related phenomena, using computer simulations. CFD is a widely adopted methodology for solving complex problems in many areas of modern engineering. The merits of CFD are the development of new and improved equipment and system designs, and optimizations are performed on existing equipment through simulation, leading to increased efficiency and reduced costs. However, in the biomedical sector, CFD are still emerging. The main reason why CFD in the biomedical fie

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15

Anderson, Richard L., H. Christopher Greenwel, James L. Suter, Rebecca M. Jarvis, and Peter V. Coveney. "Towards the design of new and improved drilling fluid additives using molecular dynamics simulations." Anais da Academia Brasileira de Ciências 82, no. 1 (March 2010): 43–60. http://dx.doi.org/10.1590/s0001-37652010000100005.

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During exploration for oil and gas, a technical drilling fluid is used to lubricate the drill bit, maintain hydrostatic pressure, transmit sensor readings, remove rock cuttings and inhibit swelling of unstable clay based reactive shale formations. Increasing environmental awareness and resulting legislation has led to the search for new, improved biodegradable drilling fluid components. In the case of additives for clay swelling inhibition, an understanding of how existing effective additives interact with clays must be gained to allow the design of improved molecules. Owing to the disordered

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16

Wu, S. Z., D. N. Wormley, D. Rowell, and H. M. Paynter. "Dynamic Modeling and Simulation of Gaseous Systems." Journal of Dynamic Systems, Measurement, and Control 107, no. 4 (December 1, 1985): 262–66. http://dx.doi.org/10.1115/1.3140733.

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A general computer-based mathematical modeling system for analyzing air/gas system dynamics has been developed. A set of generic lumped and distributed elements are interconnected by generalized junction structures to represent system configurations. The dynamic response of pressure, flow, temperature, and heat transfer rate at any point in a system, due to control actions, or fluid, thermal, or mechanical disturbances can be determined. The model has been used to analyze furnace implosion and disturbance propagation problems in fossil fuel power plants. To illustrate the modeling techniques,

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17

Heryana, Yayan Heryana. "Analysis of Orifice in Biodiesel Reactor with Hydrodynamic Cavitation System using Computational Fluid Dynamics." Jurnal Keteknikan Pertanian 10, no. 1 (May 18, 2022): 85–94. http://dx.doi.org/10.19028/jtep.010.1.85-94.

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Reactor technology for the transesterification process of vegetable oils or animal fats with methanol has been widely developed to obtain biodiesel products that comply with standards but at the lowest cost. The hydrodynamic cavitation reactor with orifice type is a choice for this purpose. This research aims to determine the optimal orifice design from several orifice designs tested through CFD simulation. Computer simulations performed on orifices A, B, C and D using the Schnerr and Sauer models show that orifice C is optimal for cavitation at an absolute inlet pressure of 3x105 N/m2 with th

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18

Yao, Yao, Yu Bai, and Ming Liu. "Fluid Dynamics Analysis and Research of Electrostatic Oiler Knife Beam." Applied Mechanics and Materials 318 (May 2013): 140–43. http://dx.doi.org/10.4028/www.scientific.net/amm.318.140.

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The research object of this paper is about the oil equipments’ fluid properties during spraying of the electrostatic spraying technology. Establishing the mathematical model of fluid inside the oiling machine in the process of computer simulation and using fluid dynamics analysis software ( CFD ) FLUENT to analyse numerical simulation within spraying fluid effectively. According to the actual situation, reach knife beam’s pressure distribution, velocity distribution, flow trajectories, partial velocity diagram. Finally, verify the correctness and feasibility of the simulation by the contrast o

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19

Huang, Hanyao, Xu Cheng, Yang Wang, Dantong Huang, Yuhao Wei, Heng Yin, Bing Shi, and Jingtao Li. "Analysis of Velopharyngeal Functions Using Computational Fluid Dynamics Simulations." Annals of Otology, Rhinology & Laryngology 128, no. 8 (April 8, 2019): 742–48. http://dx.doi.org/10.1177/0003489419842217.

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Objectives: Competent velopharyngeal (VP) function is the basis for normal speech. Understanding how VP structure influences the airflow during speech details is essential to the surgical improvement of pharyngoplasty. In this study, we aimed to illuminate the airflow features corresponding to various VP closure states using computed dynamic simulations. Methods: Three-dimensional models of the upper airways were established based on computed tomography of 8 volunteers. The velopharyngeal port was simulated by a cylinder. Computational fluid dynamics simulations were applied to illustrate the

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Raczkowski, Andrzej, Zbigniew Suchorab, and Przemysław Brzyski. "Computational fluid dynamics simulation of thermal comfort in naturally ventilated room." MATEC Web of Conferences 252 (2019): 04007. http://dx.doi.org/10.1051/matecconf/201925204007.

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The paper presents experimental measurements and numerical simulation of thermal environment in naturally ventilated room by a fresh air valve. For the aim of Computer Fluid Dynamics (CFD) simulations, a model room was created. The fresh air valve is located in an occupied space, at the external wall. It has a major effect on mixing indoor and outdoor air, temperature profiles, thermal condition and indoor air quality of the rooms during the heating period. To determine the thermal condition of a naturally ventilated building, PN-EN 15251:2012 standard was used. According to the standard, usin

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21

Janczarek, Marcin, and Ewa Kowalska. "Computer Simulations of Photocatalytic Reactors." Catalysts 11, no. 2 (February 3, 2021): 198. http://dx.doi.org/10.3390/catal11020198.

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Photocatalysis has been considered future technology for green energy conversion and environmental purification, including carbon dioxide reduction, water splitting, air/water treatment, and antimicrobial purposes. Although various photocatalysts with high activity and stability have already been found, the commercialization of photocatalytic processes seems to be slow; it is thought that the difficulty in scaling up photocatalytic processes might be responsible. Research on the design of photocatalytic reactors using computer simulations has been recently intensive. The computer simulations i

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Yamagata, Kanako, Keiji Shinozuka, Shouhei Ogisawa, Akio Himejima, Hiroaki Azaki, Shuichi Nishikubo, Takako Sato, Masaaki Suzuki, Tadashi Tanuma, and Morio Tonogi. "A preoperative predictive study of advantages of airway changes after maxillomandibular advancement surgery using computational fluid dynamics analysis." PLOS ONE 16, no. 8 (August 11, 2021): e0255973. http://dx.doi.org/10.1371/journal.pone.0255973.

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The purpose of this study was to develop a simulation approach for predicting maxillomandibular advancement-induced airway changes using computational fluid dynamics. Eight patients with jaw deformities who underwent maxillomandibular advancement and genioglossus advancement surgery were included in this study. Computed tomography scans and rhinomanometric readings were performed both preoperatively and postoperatively. Computational fluid dynamics models were created, and airflow simulations were performed using computational fluid dynamics software; the preferable number of computational mes

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Berger, Manuel, Aris I. Giotakis, Martin Pillei, Andreas Mehrle, Michael Kraxner, Florian Kral, Wolfgang Recheis, Herbert Riechelmann, and Wolfgang Freysinger. "Agreement between rhinomanometry and computed tomography-based computational fluid dynamics." International Journal of Computer Assisted Radiology and Surgery 16, no. 4 (March 7, 2021): 629–38. http://dx.doi.org/10.1007/s11548-021-02332-1.

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Abstract Purpose Active anterior rhinomanometry (AAR) and computed tomography (CT) are standardized methods for the evaluation of nasal obstruction. Recent attempts to correlate AAR with CT-based computational fluid dynamics (CFD) have been controversial. We aimed to investigate this correlation and agreement based on an in-house developed procedure. Methods In a pilot study, we retrospectively examined five subjects scheduled for septoplasty, along with preoperative digital volume tomography and AAR. The simulation was performed with Sailfish CFD, a lattice Boltzmann code. We examined the cor

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Wretborn, Joel, Sean Flynn, and Alexey Stomakhin. "Guided bubbles and wet foam for realistic whitewater simulation." ACM Transactions on Graphics 41, no. 4 (July 2022): 1–16. http://dx.doi.org/10.1145/3528223.3530059.

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We present a method for enhancing fluid simulations with realistic bubble and foam detail. We treat bubbles as discrete air particles, two-way coupled with a sparse volumetric Euler flow, as first suggested in [Stomakhin et al. 2020]. We elaborate further on their scheme and introduce a bubble inertia correction term for improved convergence. We also show how one can add bubbles to an already existing fluid simulation using our novel guiding technique, which performs local re-simulation of fluid to achieve more interesting bubble dynamics through coupling. As bubbles reach the surface, they ar

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Shao, Xuqiang, Erchong Liao, and Fengquan Zhang. "Improving SPH Fluid Simulation Using Position Based Dynamics." IEEE Access 5 (2017): 13901–8. http://dx.doi.org/10.1109/access.2017.2729601.

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Shinto, Hiroyuki. "Computer Simulation of Wetting and Capillary Forces —Molecular Modeling and Fluid Dynamics—." Journal of the Society of Powder Technology, Japan 46, no. 1 (January 10, 2009): 25–34. http://dx.doi.org/10.4164/sptj.46.25.

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Kinjo, T., K. Ohguchi, K. Yasuoka, and M. Matsumoto. "Computer simulation of fluid phase change: vapor nucleation and bubble formation dynamics." Computational Materials Science 14, no. 1-4 (February 1999): 138–41. http://dx.doi.org/10.1016/s0927-0256(98)00088-3.

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Araújo, Bruna Sene Alves, and Kássia Graciele dos Santos. "CFD Simulation of Different Flow Regimes of the Spout Fluidized Bed with Draft Plates." Materials Science Forum 899 (July 2017): 89–94. http://dx.doi.org/10.4028/www.scientific.net/msf.899.89.

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Spout fluidized bed has shown promising for gas-solid contact operations with and without chemical reactions, such as drying, coating, granulation, gasification, pyrolysis, etc. This is because these beds combine features from both spouted and fluidized beds. The other point is the ability to treat chemical transformations involving both heat and mass transfer in combination with particles of various sizes. Therefore, it is extremely important the knowledge of fluid dynamic of the bed, mainly for scale-up projects, which makes computer simulation an essential tool. Researches using the Computa

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Yu, Zhenning, and Seng Fat Wong. "The application of computational fluid dynamics simulation technique to ocean boat anti-disturbance tracking controller." International Journal of Advanced Robotic Systems 16, no. 3 (May 1, 2019): 172988141984204. http://dx.doi.org/10.1177/1729881419842045.

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This article presents the verification problem of estimating boat hull damping parameters using the computational fluid dynamics technique. In addition, a Lyapunov-based path control system will be introduced to centify the estimation result. The controller should satisfy the following features: firstly, maintaining that the boat dynamic model which includes path, velocity, and orientation errors are asymptotically stable; secondly, ensuring the actuation is operating normally under the nonlinear hydrodynamic system and actual environment limitation; thirdly, working with the anti-disturbance

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Dixon, Anthony G., and Behnam Partopour. "Computational Fluid Dynamics for Fixed Bed Reactor Design." Annual Review of Chemical and Biomolecular Engineering 11, no. 1 (June 7, 2020): 109–30. http://dx.doi.org/10.1146/annurev-chembioeng-092319-075328.

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Flow, heat, and mass transfer in fixed beds of catalyst particles are complex phenomena and, when combined with catalytic reactions, are multiscale in both time and space; therefore, advanced computational techniques are being applied to fixed bed modeling to an ever-greater extent. The fast-growing literature on the use of computational fluid dynamics (CFD) in fixed bed design reflects the rapid development of this subfield of reactor modeling. We identify recent trends and research directions in which successful methodology has been established, for example, in computer generation of packing

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Filipovic, Nenad, and Milos Kojic. "Computer simulations of blood flow with mass transport through the carotid artery bifurcation." Theoretical and Applied Mechanics 31, no. 1 (2004): 1–33. http://dx.doi.org/10.2298/tam0401001f.

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The current paradigm for clinical diagnostic for the treatment of vascular disease relies exclusively on diagnostic imaging data to define the present state of the patient, empirical data to evaluate the efficacy of prior treatments for similar patients. These techniques are insufficient to predict the outcome of a given treatment for an individual patient. We here propose a new paradigm of predictive medicine where physician could use computational simulation to construct and evaluate a specific geometrical/anatomical model to predict the outcome for an individual patient. For this purpose it

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Šulc, Stanislav, Vít Šmilauer, and František Wald. "COUPLED SIMULATION FOR FIRE-EXPOSED STRUCTURES USING CFD AND THERMO-MECHANICAL MODELS." Acta Polytechnica CTU Proceedings 13 (November 13, 2017): 121. http://dx.doi.org/10.14311/app.2017.13.0121.

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Fire resistance of buildings is based on fire tests in furnaces with gas burners. However, the tests are very expensive and time consuming. This article presents a coupled simulation of an element loaded by a force and a fire loading. The simulation solves a weakly-coupled problem, consisting of fluid dynamics, heat transfer and mechanical model. The temperature field from the computational fluid dynamics simulation (CFD) creates Cauchy and radiative boundary conditions for the thermal model. Then, the temperature field from element is passed to the mechanical model, which induces thermal stra

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Skipper, N. T. "Computer simulation of aqueous pore fluids in 2:1 clay minerals." Mineralogical Magazine 62, no. 5 (October 1998): 657–67. http://dx.doi.org/10.1180/002646198548043.

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AbstractMonte Carlo and molecular dynamics computer simulations are now able to provide detailed information concerning the structure, dynamics, and thermodynamics of pore fluids in 2:1 clays. This article will discuss interparticle interaction potentials currently available for atomistic simulations of clay-water systems, and will describe how computational techniques can be applied to modelling of clay systems. Some recent simulation studies of 2:1 clay hydration will then be reviewed. Comparison with experimental data promotes confidence in the molecular models and simulation techniques, an

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MOEENDARBARY, E., T. Y. NG, and M. ZANGENEH. "DISSIPATIVE PARTICLE DYNAMICS IN SOFT MATTER AND POLYMERIC APPLICATIONS — A REVIEW." International Journal of Applied Mechanics 02, no. 01 (March 2010): 161–90. http://dx.doi.org/10.1142/s1758825110000469.

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Computer simulations and in particular mesoscopic simulation techniques such as the dissipative particle dynamics (DPD) technique, enable researchers to study the complexities of soft material and polymeric systems by performing in silico experimentations alongside in vivo experiments. In addition, these mesoscopic simulations allow scientists and engineers to characterize and optimize the actual experiments in a more efficient manner. The DPD is one the most reliable mesoscopic simulation techniques for phenomenological investigation of soft matter and polymeric systems. In this review, which

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Marturano, Fabio, Luca Martellucci, Andrea Chierici, Andrea Malizia, Daniele Di Giovanni, Francesco d’Errico, Pasquale Gaudio, and Jean-Franҫois Ciparisse. "Numerical Fluid Dynamics Simulation for Drones’ Chemical Detection." Drones 5, no. 3 (July 29, 2021): 69. http://dx.doi.org/10.3390/drones5030069.

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The risk associated with chemical, biological, radiological, nuclear, and explosive (CBRNe) threats in the last two decades has grown as a result of easier access to hazardous materials and agents, potentially increasing the chance for dangerous events. Consequently, early detection of a threat following a CBRNe event is a mandatory requirement for the safety and security of human operators involved in the management of the emergency. Drones are nowadays one of the most advanced and versatile tools available, and they have proven to be successfully used in many different application fields. Th

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BARTOLONI, A., C. BATTISTA, S. CABASINO, P. S. PAOLUCCI, J. PECH, R. SARNO, G. M. TODESCO, et al. "LBE SIMULATIONS OF RAYLEIGH-BÉNARD CONVECTION ON THE APE100 PARALLEL PROCESSOR." International Journal of Modern Physics C 04, no. 05 (October 1993): 993–1006. http://dx.doi.org/10.1142/s012918319300077x.

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In this paper we describe an implementation of the Lattice Boltzmann Equation method for fluid-dynamics simulations on the APE100 parallel computer. We have performed a simulation of a two-dimensional Rayleigh-Bénard convection cell. We have tested the theory proposed by Shraiman and Siggia for the scaling of the Nusselt number vs. Rayleigh number.

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Sun, Jin, Francine Battaglia, and Shankar Subramaniam. "Hybrid Two-Fluid DEM Simulation of Gas-Solid Fluidized Beds." Journal of Fluids Engineering 129, no. 11 (June 9, 2007): 1394–403. http://dx.doi.org/10.1115/1.2786530.

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Simulations of gas-solid fluidized beds have been performed using a hybrid simulation method, which couples the discrete element method (DEM) for particle dynamics with the averaged two-fluid (TF) continuum equations for the gas phase. The coupling between the two phases is modeled using an interphase momentum transfer term. The results of the hybrid TF-DEM simulations are compared to experimental data and TF model simulations. It is found that the TF-DEM simulation is capable of predicting general fluidized bed dynamics, i.e., pressure drop across the bed and bed expansion, which are in agree

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Carvalho, A. J. G., D. C. Galindo, M. S. C. Tenório, and J. L. G. Marinho. "MODELING AND SIMULATION OF A HORIZONTAL THREE-PHASE SEPARATOR: INFLUENCE OF PHYSICOCHEMICAL PROPERTIES OF OIL." Brazilian Journal of Petroleum and Gas 14, no. 04 (January 7, 2021): 205–20. http://dx.doi.org/10.5419/bjpg2020-0016.

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Fluids produced from oil reservoirs typically contain oil, natural gas, water, sediments, in varying amounts, and contaminating gases. Considering that economic interest usually targets mostly oil and gas, primary processing is used to separate water/oil/gas, in addition to treating these phases. Therefore, the well stream should be processed as soon as possible after reaching the surface. Separator vessels are among the main equipment used at surface production facilities, being responsible for the separation of the produced phases. This work focuses on studying the fluid dynamic behavior in

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Zou, Ling. "Simulating Liquid Dynamics by a Particle-Based Method." Applied Mechanics and Materials 380-384 (August 2013): 1121–24. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.1121.

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There is much research focusing on natural phenomena simulation in virtual reality and computer graphics. Liquid is chosen as our research object, because it is one of the most common natural phenomena. A particle-based modeling method for dynamic liquid simulation is presented in this paper. In our approach, accurate solutions for the Navier-Stokes equations are first accomplished in an Euler-based grid at each time step. This returns a velocity field calculated based on the pressure solved from a converted Poisson equation. Finally, particle movements are advected through this velocity field

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Bai, Ming Hua, Qing Rong Liu, and Hong Liang Zhou. "Design of Magnetic Fluid Sealing Device and Computer Simulation in Sintering Machine." Advanced Materials Research 328-330 (September 2011): 2270–73. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.2270.

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This paper, based on magnetic fluid dynamics, combined with the air leakage of sintering machine, proposes a new type of magnetic fluid sealing device in sintering machine. According to the sealing mechanism of MHD as well as Bernoulli equation, the sealing theory--pressure difference equation in static sealing by magnetic fluid is deduced for the actual model of sintering machine. By using ansys finite element simulation software, the two-dimensional numerical simulation of thermal magnetic- coupling inside of sealing device is set up, the effects of different temperature on the magnetic prop

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Wagner, Martin, and Marisol Ripoll. "Solvent-induced depletion interactions in multiparticle collision dynamic simulations." International Journal of Modern Physics C 30, no. 10 (October 2019): 1941008. http://dx.doi.org/10.1142/s0129183119410080.

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Molecular-dynamics-coupled multiparticle collision dynamic (MPC-MD) simulations have emerged to be an efficient and versatile tool in the description of mesoscale colloidal dynamics. However, the compressibility of the coarse-grained fluid leads to this method being prone to spurious depletion interactions that may dominate the colloidal dynamics. In this paper, we review the existing methodology to deal with these interactions, establish and report depletion measurements, and present a method to avoid artificial depletion in mesoscale simulation methods.

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SARMENTO, C. V. S., A. O. C. FONTE, L. J. PEDROSO, and P. M. V. RIBEIRO. "From numerical prototypes to real models: a progressive study of aerodynamic parameters of nonconventional concrete structures with Computational Fluid Dynamics." Revista IBRACON de Estruturas e Materiais 13, no. 3 (June 2020): 628–43. http://dx.doi.org/10.1590/s1983-41952020000300012.

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Abstract The practical evaluation of aerodynamic coefficients in unconventional concrete structures requires specific studies, which are small-scale models evaluated in wind tunnels. Sophisticated facilities and special sensors are needed, and the tendency is for modern and slender constructions to arise with specific demands on their interaction with the wind. On the other hand, the advances obtained in modern multi-core processors emerge as an alternative for the construction of sophisticated computational models, where the Navier-Stokes differential equations are solved for fluid flow using

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Rometsch, Thomas. "Detecting vortices in fluid dynamics simulations using computer vision." Proceedings of the International Astronomical Union 16, S362 (June 2020): 398–403. http://dx.doi.org/10.1017/s1743921322001454.

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AbstractVortices are patches of fluid revolving around a central axis. They are ubiquitous in fluid dynamics. To the human eye, detecting vortices is a trivial task thanks to our inherent ability to identify patterns. To solve this task automatically, we developed the Vortector pipeline which was used to identify and characterize vortices in around one million snapshots of planet-disk interaction simulations in the context of planet formation. From the emergence of two regimes of vortex lifetime, one of which shows very long-lived vortices, we conclude that future resolved disk observations wi

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Dominguez, Hector, Orest Pizio, Laszlo Pusztai, and Stefan Sokolowski. "The Structural Properties and Diffusion of a Three-Dimensional Isotropic Core-Softened Model Fluid in Disordered Porous Media. Molecular Dynamics Simulation." Adsorption Science & Technology 25, no. 7 (September 2007): 479–91. http://dx.doi.org/10.1260/0263-6174.25.7.479.

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The microscopic structure and dynamic properties of an isotropic three-dimensional core-softened model fluid in disordered matrices of Lennard-Jones particles have been studied. Molecular dynamics computer simulations in Grand Canonical ensemble were used as the methodological tools. It was shown that the microscopic structure of the fluid is characterized by anomalies similar to those found in a bulk model, but that it is affected by the fluid-matrix interactions. The dynamic properties also exhibit anomalous dependence on fluid density, but the magnitude of these anomalies is suppressed in c

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Santos, D. A., I. Petri Junior, Marcos A. S. Barrozo, and Claudio Roberto Duarte. "Mixture of Particles' Influence in Computer Simulations of a Spouted Bed." Materials Science Forum 660-661 (October 2010): 448–53. http://dx.doi.org/10.4028/www.scientific.net/msf.660-661.448.

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This article aims to assess the influence of the way of simulating monoparticles as just monoparticles or as a mixture of particles, the latter, unlike the first, considering the effect of particle-particle interaction. The Eulerian–Eulerian multiphase model is used in the computational simulation of fluid dynamics of spouted beds and compared with experimental data. A half column of cylindrical spouted bed with a full plane glass attached to the front open surface of the bed as the transparent window was used for observation and photographing. Images of solid flows were recorded using a high

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Colonna, Piero, and Paolo Silva. "Dense Gas Thermodynamic Properties of Single and Multicomponent Fluids for Fluid Dynamics Simulations." Journal of Fluids Engineering 125, no. 3 (May 1, 2003): 414–27. http://dx.doi.org/10.1115/1.1567306.

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The use of dense gases in many technological fields requires modern fluid dynamic solvers capable of treating the thermodynamic regions where the ideal gas approximation does not apply. Moreover, in some high molecular fluids, nonclassical fluid dynamic effects appearing in those regions could be exploited to obtain more efficient processes. This work presents the procedures for obtaining nonconventional thermodynamic properties needed by up to date computer flow solvers. Complex equations of state for pure fluids and mixtures are treated. Validation of sound speed estimates and calculations o

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Espinosa, Jorge R., Pablo Sampedro, Chantal Valeriani, Carlos Vega, and Eduardo Sanz. "Lattice mold technique for the calculation of crystal nucleation rates." Faraday Discussions 195 (2016): 569–82. http://dx.doi.org/10.1039/c6fd00141f.

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We present a new simulation method for the calculation of crystal nucleation rates by computer simulation. The method is based on the use of molds to induce crystallization in state points where nucleation is a rare event. The mold is a cluster of potential energy wells placed in the lattice positions of the solid. The method has two distinct steps. In the first one the probability per unit volume of forming a sub-critical crystal cluster in the fluid is computed by means of thermodynamic integration. The thermodynamic route consists in gradually switching on an attractive interaction between

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Kovalev, I. S. "MATHEMATICAL AND COMPUTER SIMULATION OF THE COMMERTIAL VEHICLE’S HYDRAULIC RETARDER." Vestnik SibADI 15, no. 3 (July 11, 2018): 400–411. http://dx.doi.org/10.26518/2071-7296-2018-3-400-411.

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Introduction.The article represents the mathematical model of commercial vehicle’s hydraulic retarder. The model is based on the mathematical model of the variable filling hydraulic dynamometer.Materials and methods.The retarder model was designed with the possibility of its integration with the mathematical model of the engine cooling system. For this purpose, the state function of fluid temperature in a working chamber of the retarder was added to the retarder model. Consequently, fluid compression in the working chamber was included into the model to avoid unlimited filling because of possi

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Fan, Zhe, Yu-Chuan Kuo, Ye Zhao, Feng Qiu, Arie Kaufman, and William Arcieri. "Visual simulation of thermal fluid dynamics in a pressurized water reactor." Visual Computer 25, no. 11 (January 23, 2009): 985–96. http://dx.doi.org/10.1007/s00371-008-0309-x.

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Song, Yuan, and Insu Paek. "Prediction and Validation of the Annual Energy Production of a Wind Turbine Using WindSim and a Dynamic Wind Turbine Model." Energies 13, no. 24 (December 14, 2020): 6604. http://dx.doi.org/10.3390/en13246604.

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In this study, dynamic simulations of a wind turbine were performed to predict its dynamic performance, and the results were experimentally validated. The dynamic simulation received time-domain wind speed and direction data and predicted the power output by applying control algorithms. The target wind turbine for the simulation was a 2 MW wind turbine installed in an onshore wind farm. The wind speed and direction data for the simulation were obtained from WindSim, which is a commercial computational fluid dynamics (CFD) code for wind farm design, and measured wind speed and direction data wi

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