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Quasi-steady Marching-on in Time Approximation Technique of Numerical Simulation of Wind Pressures on Building Zhixiang Yu1a, Yanjun Yan2b , Hao Wu1c 1 School of Civil Engineering Southwest Jiaotong University ,Chengdu, China 2 College of Civil Engineering Tongji University ,Shanghai, China ayzxzrq@126.com, byyj07011100@yahoo.com.cn, c Yong_zhiwu @163.com Keywords: Wind load,Quasi-steady Approximation, CFD, Murakami model, Numerical simulation Abstract.
Introduction Since the 1990s, CFD has been employed to analyze the wind pressure of buildings by many scholars such as Murakami [1-2], Selvam [3-4], Holmes [5].
Hibi, Three-dimensional numerical simulation of air flow around a cubic model by means of large eddy simulation, J.
Panneer Selvam,Computation of pressures on Texas Tech University building using large eddy simulation, J.
Computational fluid dynamics analysis: CFD Software Principles and Applications [M].

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.

Controlling Model In the course of numerical simulation, the k-ε model is adopted.
Numerical Simulation[7-10] Boundary Condition, Dispersing and Messing.
Before CFD computing on special problem, calculating area must disperse by messing.
Numerical Simulation.
Wang: The Principle and Application of CFD Software (Tsinghua University Press, China 2004) [10] Z.Z.

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.

Flow Field Simulation of Fan Nozzle Jet used for Disc Tool Cooling with Fluent REN ZhongWei1,a, SONG Ming1,a, LIU YaFei2,b, LUO LiYing3,cand LIU Yang4,d 1Shenyang University of Technology，Shenyang, P.R.CHINA 2AVIC Guizhou Honglin Machinery Co., Ltd, P.R.CHINA 3Urumqi Weian Registered Safety Engineer Office (limited), P.R.CHINA 4Huainan Gede heavy equipment Co., Ltd, P.R.CHINA arzw9811210@163.com, blyf4669656@163.com, cshadow0311@sina.com, d18241515551@139.com Key Words：Nozzle, tool cooling, flow field simulation Abstract.
In order to study the effects of structural parameters on the spray nozzle, simulation and experiments were performed on injection pressure and surface tension and other factors to the ejection performance of the nozzle.
Fig.5 Nozzle velocity curve of internal and external flow field on axis Fig.6 Velocity distribution of nozzle jet in 100mm target distance and the section Conclusion In this paper, fan nozzle as the research object for the disc tool cooling. physical model of fan nozzle was established by the Solid Works software, and the simulation is carried out.
A Study of Abrasive Water jet Characteristies by CFD Simulation [J].
Wang, Analysis of Computational Fluid Dynamics-Principle and Application of CFD Software [M], Beijing: Tsinghua University Press, 2004.

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

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.

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.

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 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].