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Based on the simulation results, the uniformity of the precursor distribution is better, with the increasment of the inlet flow, so the quality of GaN film is superior.
Previous studies on the temperature in MOCVD reactor chamber focused on the simulations of parameters such as the gas flow in the reactor and the shape of the reactor [5,6].Computational fluid dynamics (CFD) simulation is considered as a significant approach to predict the GaN film growth rate and to examine the dependence on various critical parameters.
Theoretical model The complete transport phenomena in a GaN MOCVD process can be well described using the above equations, all of which have been integrated into the commercial available code CFD.
From the simulation results, it is the fact that the increasment of inlet flow is benefical to the distribution of the precursor, so the high quality of GaN film has been grown.
Conclusions The CFD has been used to simulate a two dimensional mode of GaN deposition in a vertical MOCVD reactor.

The model for the analysis of the gear pump work designed for the hydraulic systems was made for the 3D non-stationary two-phase flow using CFD software.
Due to the questionable measurements of these phenomena there was chosen the method CFD (Computational Fluid Dynamics) for the simulation calculation of the pressure wave produced when opening of the gear space in the discharge port and cavitation arising during the pump work [1-3].
The used turbulence models in simulation calculations of cavitation are shown in Table 1.
Moczala, Intermittent CFD simulation of interlocked hydraulic pumps - industrial use, basic conditions and prospect, In: Simulation im mechanischen Umfeld, FLUIDON Konferenz 2009, November 10 - 11, Aachen, Germany, 2009
Suresh, TWO-DIMENSIONAL CFD ANALYSIS OF A HYDRAULIC GEAR PUMP, In: AC 2007-821: American Society for Engineering Education, 2007

A three-dimensional mathematic model is developed for a 100kw single-end recuperative radiant tube and the simulation is performed with the CFD software FLUENT.
In this study, a three-dimensional mathematic model is developed for a 100kw single-end recuperative radiant tube and the simulation is performed with the CFD software FLUENT.
Simulation results and analysis Comparison of simulation results and experimental data.Fig.2 shows the isothermal profile of central cross-section of radiant tube with 25mm distances between combustion chamber exit and inner tube, and Fig.3 shows the comparison of the tube surface temperature distribution between simulation result and experimental data.
Thus we can conclude that the mathematical models used in the simulation are relatively reliable.
The model governing equations are solved by CFD software FLUENT.

Low-wind-drag numerical research on fenders and wheels of car model Xingjun Hu 1, a, Yunyun Zhu 1,b 1State Key Lab of Automobile Simulation and Control, Jilin University, Changchun 130022,China ahxj@jlu.edu.cn, baazhuyunyun@163.com Keywords: low-wind-drag, Automotive Aerodynamics, fenders and wheels, CFD Abstract.
The aerodynamic characteristics and the flow field structure of the passenger car model were obtained with CFD, then the affect of the fenders and the wheels to the aerodynamic resistance were analyzed.
Therefore, reducing the aerodynamic drag of vehicle when driving plays a significant role in energy saving, emission reducing and environment protecting[2].With the development of computer technology and CFD, increasing numerical simulations of external flow of vehicles have been applied to automotive low-wind resistance , the concept of which has been put forward widely.
Numerical Simulation CAD model.
The widely proven SST k-omega model was used in this paper to solve the simulation processes in combination with the automatic near-wall treatment developed for the k-omega based model.

a*sanjuan_ges@quimica.unam.mx, barturocdg@gmail.com, citzel.calera@gmail.com, dangelencc@quimica.unam.mx Keywords: Non-Newtonian, Simulation, Rheology, Semisolid alloys, CFD.
In order to study and A356 aluminum semisolid alloy flow, a Computational Fluid Dynamics (CFD) software (ANSYS) is used to simulate the die filling process in a rectangular mold.
Simulation was run without considering energy transfer.
Parameters used for the simulations of each constitutive model.
In general, simulations obtained in present work by using ANSYS software, have correspondence with other simulations [7-10].

While, in the study of numerical simulation of biomass derived syngas combustion in a swirl flame combustor, the analysis showed that the possibility to employ appropriate combustion models and simplified or detailed chemical schemes.
The simulation includes global reaction mechanism, assuming that complete conversion of the fuel to CO2 and H2O and other minor species.
Using species transport model, the steady turbulent flow equation are solved according to the generalized continuity, energy and momentum equation in CFD.
Peretto, “Numerical Simulation of Biomass Derived Syngas Combustion in a Swirl Flame Combustor”, Proceedings of ASME Turbo Expo 2010: Power for Land, Sea and Air, vol. 1, pp. 571-582, Glasgow, UK, June, 2010
Shuaib, and A.F.W.A Wan, “CFD Analysis of Temperature Distribution in Can Type Combustor Firing Synthetic Gas”, Applied Mechanics and Materials, Vol. 393 (2013), pp 741-746, 2013.

Risk forecast of in-stent restenosis by CFD method LIN Changyan1,2a, LIU Xiujian1,2b, LIU Yuyang1c, XU Chuangye1,2, WU Guanghui1,2 1Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China 2Beijing Institute of Heart Lung & Blood Vessel Diseases, Beijing 100029, China allbl@sina.coml, bliuxjian146120@gmail.com, cliuyy803803@163.com Keywords: coronary bifurcation; in-stent restenosis; hemodynamics; wall shear stress; CFD Abstract.
Based on patient-specific pre-interventional and virtual stented geometries from CTA images, numerical simulation indicated that the wall shear stress (WSS) in stented segments, where the ISR occurred in one year, was lower than those without ISR, however.
It is worth noting that the estimation of WSS is best done with medical image-based computational fluid dynimics(CFD), rather than direct measurement of fluid velocities.
Investigation of blood flow patterns has benefited from recent advances in CFD software, while the solid mechanical stresses in the artery wall can be modeled with finite element analysis (FEA).
Fluid dynamic simulations were carried out through solving the continuity and momentum conservation equations, based on a finite volume method.

This paper applied computational fluid dynamics (CFD) to analyze flow field of MQL in thread turning.
Angulo [6] found MQL can reduce tool wear by experiments and simulation techniques.
Different compressed air flow rates will affect performance of MQL, which has been investigated in CFD simulation.
This paper utilized FLUENT (CFD analysis software, ANSYS Inc.) to analyze flow field of MQL.
In the simulation, SIMPLE solver was the solution method.

A procedure is presented for simulation and analysis of secondary side of PGV-440 steam generator for nominal and increased reactor power.
Physical models were implemented in ANSYS Fluent CFD environment using the User Defined Functions (UDFs).
A detailed insight into two-phase flow on the secondary side can be obtained by a three-dimensional thermal-hydraulic numerical simulation.
The physical models were implemented in ANSYS Fluent CFD environment using UDFs.
Ilvonen, CFD-simulation of the VVER-440 steam generator with porous media model, 8th International Seminar on Horizontal Steam Generators, Podolsk, 2010, pp.1-15.

The simulations are in agreement with the published experiment data.
The conventional model is used for closing the momentum equation in CFD and the model is used for closing the energy conservation equations.
Accompanied CFD Equation Set.
Yu: Computational Mass Transfer Method for Chemical Process Simulation, Chin.
Meisen: Simulation of Pilot Plant and Industrial CO2 MEA Absorbers, Gas Sep.