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Up to now, many simulations and experiments have been completed in foreign countries about the engine [2].
In China little is done about this kind of engine and only some numerical simulations were completed for the reason of limited conditions.
Numerical model For the present simulation, a combustion chamber sector of 60 degrees was set up for computation in Pro/E software.
Fig.1 60° sector geometric model Fig. 2 60°mesh got in the ICEM-CFD The mesh in the cylinder area was dynamic mesh with the motion of piston during combustion process.
So after getting all cells to be used in the analysis, the cell removal, addition and reconnection during simulation were controlled by dynamic grid program.

A numerical model was built by using the CFD software Flent, which was verified with the experimental data.
The temperature profile of the heat sink system was analyzed by using CFD software Fluent.
The relationship between Vand T Simulation optimization of the thermal performance Due to the symmetry of the LED street lamp, a 1/4 of model was used to study the thermal performance by using the Fluent software.
The relative error is reasonable, so the numerical simulation model is reliable.
Then, the influence of the different structure parameters of the heat sink on heat dissipation performance was studied by using CFD software Fluent.

Finite element simulation method of random vibration analysis was used for hermetically metal sealing.
According to the using conditions, the hermetically metal sealing ran the random vibration simulation analysis in ANSYS after inputting PSD spectra (Fig. 3).
In order to verify the random vibration damage mechanism, random vibration test of hybrid the hermetically metal sealing was performed, with the same random vibration test conditions and simulation conditions.
The cumulative fatigue damage (CFD) is then written as CFD=i=1nΔDi (2) In random vibration fatigue failure analysis, it is assumed that CFD = 1 when failure occurs.
Simulation of random fatigue life.

By using the numerical simulation method, we can get the law of the flow field.
In this paper, by using the CFD method in stirred tanks, we applied the theory to the studying of the flow field of soymilk makers.
CFD Modeling 2.1 Model of Rotary Region.
Multiple reference frame model is the model that is commonly used in a steady state simulation.
Then we arranged the numerical simulation of the spoiler ribs, the results were shown in table 2.

High-Quality SiC Bulk Single Crystal Growth based on Simulation and Experiment S.
Electromagnetic and thermal fields were analyzed by the commercial software, Flux-Expert [13,14], and CFD-ACE+[15].
These effects were confirmed by both numerical simulation and experiments.
The author, S.N, thanks Dr.Michel.Pons at INPG for his help on numerical simulation.
[15] CFD-ACE+, CFDRC, AL, USA

Simulation results of particle dispersion in the tank with various injection angles are conducted, displayed, and concluded.
Over the last few decades, computational fluid dynamics (CFD) has been used as a tool dealing with mathematical modeling of the problems.
This paper therefore presents some aspect of a simulation study on removing particles from the cleaning tank.
Numerical model The first step for simulation is to simplify the problem.
Xu, A zero-equation turbulence model for indoor airflow simulation, Energy and Buildings. 28 ( 1998) 137-144

The Research of Auger-type Heat Exchanger Fluid Characteristic Based on FLUENT Wang Haiyan1, a, Wang Na1, b, Song Juan 1, c, and Shao Ruiying 1, d 1Qingdao Huanghai College, China a541101645@qq.com, bwnsdu@163.com, c58186190@qq.com, d93659949@qq.com Keywords: Auger-Type Heat Exchanger, Fluid Characteristic, CFD, Fluent Abstract: The auger-type heat exchanger possesses many merits, such as compact structure, high thermal efficiency, and is mainly used in food, oil, natural gas and chemical industry.
The shell-side fluid characteristics are calculated through FLUENT based on computational fluid dynamics (CFD) theory, and the typical regional and cross-section of the shell-side fluid are analyzed in detail.
The numerical simulation [4] is a new research method about computational fluid dynamics and heat transfer, which has been playing an important role on the study and developing of heat exchanger.
Wang: Numerical Simulation Technology and Application of Longitudinal Flow of the Shell Heat exchanger, East China University of Science and Technology, 2000.

With increasing numbers of MEMS applications, interest has grown in recent years for process modelling, simulation and software tools useful for the prediction of etched surface profiles [4-6].
Computational Fluid Dynamics (CFD), Theory vs.
To better understand the fluid dynamics within the cavities, CFD calculations were performed based on the current test setup.
( b ) (c ) (a ) Figure 7: CFD model for current test setup: a) schematic of possible flows, b) 300µm etch depth and c) 450µm etch depth Results on actual test wafers however, show a clear difference in appearance as the etch depth increases.
These results differ from the CFD model and emphasize the dynamic nature of the flow inside these types of structures.

In this paper, a numerical simulation was performed on a scale turbofan engine nozzle to asses the influence of two nozzle configurations over the flow performance while the nozzle is situated at a certain distance from the ground.
The turbulence model chosen for this numerical simulation was SST k-ω to capture boundary layer detachment and jet attachment to the ground.
Mathematical Model In the present paper the analysis was performed with a commercial CFD code, Ansys CFX, using a steady state approach.
During the simulation, in all three cases, two recirculation zones having different thicknesses developed, first around the secondary jet exhaust, and the second between the secondary jet exhaust and ground.
[2] Lupoglazoff N., Biancherin A., Vuillot F., Rahier G., "Comprehensive 3D unsteady simulations of subsonic and supersonic hot jet flow-fields.

The computer simulation can replace the test in some extent, therefore, it can shorten the research time, reduce the cost.
As a common CFD software, Fluent can simulate complex flow from incompressible to highly compressible.
Fluent as more mature CFD simulation system, its internal database comes with a variety of laminar and turbulent ink model.
Fluent A brief introduction to Fluent—a general purpose CFD code Journal of Hydrodynamics,2001,16(2):256-259, In Chinese
Numerical simulation of tubular pump based on Fluent[J].