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First, CFD Numerical analyses were conducted to test the feasibility.
Research also had been conducted by numerical methods [10] experimental and CFD analysis comparing both for this solar assisted ventilation system [11].
ComSol multi-physics software was used to conduct the numerical simulation and mesh grids are shown in Fig 3b.
Taiwan, for his valuable advises and consultants in the numerical simulation.
Model experiment and CFD Analysis on a solar assisted ventilation system.

The HPDC process of a simple part, simulated using CFD tools (Flow-3D®Flow Science Inc.) is also reported.
By means of such simulation the integrity of shaping components was studied.
Furthermore, the semisolid die-casting of diverse elements is being studied by means of simulation tools, using the CFD software Flow-3D® (Flow Science Inc).
The preliminary simulation in Flow 3D is reported here for the HPDC process.
Thermal profile during de HPDC simulation process Figure 5.

The numerical simulation was performed by making use of the commercial CFD code which discretizes the solution domain into quadrilateral elements and use a numerical finite volume method coupled with a multigrid resolution scheme.
The governing equations were numerically solved using the commercial computational fluid dynamics (CFD) solver Ansys Fluent [10].
The width of the nozzle output is thus equal to 2,565 mm and the diameter ratio is equal to 0,905 The numerical simulation is performed by using a commercial CFD code ANSYS Fluent which uses the finite-volume method to discretize the equations of fluid flow.The flow governing equations are solved by using the k-epsilon and k-omega models with a performed coupled algorithm to treat the pressure terms in the momentum equations.
In the simulations, the convergence is defined when the residuals are reduced below 10-4 400 100 Air 53.88 48 .75 Fig. 1. 
Turbulence Modeling for CFD, 3rd ed., DCW Industries, Inc.

CFD approach was used with structure meshes to simulate the whole flow field of the pump, and make the performance prediction of the pump; The pressure released holes area are selected through theoretical and CFD analysis.
Numerical simulation and analysis Computational model.
Numerical simulation and experiment.
Approached by CFD numerical simulation, shown in Fig. 5 and Fig.6, if the sealing rings gap is certain, the pressure released holes area increases, then the leakage increase.
[5] Wang Fu-jun, Computational fluid dynamics analysis — CFD principles and application, Beijing:Tsinghua University Press, 2004 (in Chinese)

Analyzing the result of simulation, the variation curves of cone resistance and steady flow force in different opening of different structure parameters can be obtained.
This paper adopts the Computational Fluid Dynamics (CFD) method to analyze the different inner structure; it gains the value of cone applied force of hydraulic poppet valve in different uncork.
Structure of the Poppet Valve Fig.1 shows main structure of the poppet valve which is analyzed by CFD method, it is constituted by cone and valve seat, the main structure dimensions are: A=90°，B=16.5mm，C=3mm, D=6mm, F=120°, G=120°, E is the cone diameter value.
The grid of poppet valve is guided into the fluid analysis software Star-CD and is analyzed by CFD[5,6].
Conclusions The flow field CFD analytical results of hydraulic poppet valve cone diameter E changes is given in this paper.

Conceptual Design and Hydrodynamic Analysis of a High-Speed Deformable Trimaran Hongsheng Yan1,a, Xiaoying Xu1,b and Yanxin Feng 1,c 1Architectural Engineering Institute of Tianjin University, China aholmes_tj@126.com bxuxiaoying52616@163.com cwoshiwawa0901@163.com Keywords: high-speed trimaran; resistance performance; CFD; side-hull interference; adjustable-length Abstract: This paper proposed a new high-speed deformable trimaran based on DTMB5415, and discussed its advantages and applications.
We computed the hydrodynamic performance with CFD method and analyzed the wave-making interference and resistance performance for eight different arrangements of this trimaran.
CFD Simulation Based on the eight layouts, we calculated the navigation resistance when the high-speed trimaran is on the uniform linear motion in the still water and got the simulation of the flow field around it.
Configuration 0 shows the simulation of monohull.

Simulation of Flows Field Characteristics in the Nozzle of Two-Phase Compulsive Circulation Flows Finishing S.
For avoiding blindness of experimental research and improving foresight of practical application, numerical simulation of flows field characteristics in the nozzle is done through computational fluid dynamics(CFD) software(Fluent, Gambit), and it provides credible theoretic basis for thorough research.
Numerical Simulation[7-11] Boundary Conditions.
Numerical Simulation.
Wang: The principle and application of CFD software (Tsinghua University Press, China 2004) [10] Z.

And the test is processed to ascertain whether results of numerical simulation are correct.
Q(m3/d) experiment Numerical simulation Δp (MPa) experiment Numerical simulation Q (m3/d) Δp (MPa) (a)D1=4mm D2=2.8/3.2/3.6/4.0mm (b)D1=5mm D2=2.8/3.2/3.6/4.0mm Fig. 7 A comparison between experimental values and numerical simulation results As shown in Fig.7, we can see that the numerical simulation results basically coincide with experimental results, and their error is within 15%.
We can forecast the flow of throttle choke by CFD for different differential pressure and diameters.
Computational Fluid Dynamics Analysis - Principle and Application of CFD Software [M].Beijing: Qing Hua University Press, 2004, 120-123 [4] O.
Numerical simulation of the secondary throttle choke[J].

The numerical simulation for the flow characteristics of multiphase flow fields in the multiple-blade mixing agitator is carried out by means of combining of the large eddy simulation (LES) and multiphase flow model.
With the development of CFD technology, numerical simulation methods are taken to study the flow characteristics in the mixing process [1-3], which not only save research funding but also get some dates that can’t be gotten from the experiment.
The turbulence model Large eddy simulation control equation is the averaged equation after filtering the N-S equation
CFD simulation of gas-liquid flows in stirred vessel equipped with rushton turbine: influence of parallel, merging and diverging flow configurations [J].
LES and URANS simulation of hydrodynamics in mixing tank: Comparison to PIV experiments [J].

Circulatory System of Cold Side of Modeling and Simulation Based on CFdesign Zhuo Li1, a ,Danhua Chen2,b 1Department of Transportation Design ,Wuhan University of Technology,Wuhan, China 2The School of Automotive Engineering,Wuhan University of Technology,Wuhan, China alubenn@163.com,bcddhua@163.com Keywords: computer simulation software; CFdesign; circulatory system of cold side; modeling; simulation Abstract.
Technology of computer simulation makes the use of the computer software to simulate of the actual system to obtain data on target behaviors, and fluid simulation software CFdesign is one of computer simulation software.
Modeling and Simulation Software CATIA is the tool which used to establish physical model in this study of modeling and simulation for cold side system of thermoelectric conversion.
CFdesign is chosen for the simulation of flow field and temperature field, for this study is similar to the product design and development[8]~[9].The simulation software has the advantage of strong connection with engineering, which is different from the traditional CFD software like Fluent/CFX[10].The traditional CFD software users usually have long learning curves and higher professional backgrounds.
The following simulations have the same number of iterations.