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To overcome the problem, CFD was used to acquire the information.
CFD is a highlight technique for the research field of ship.
The paper simulated flow field around vehicle based on CFD technique by means of CFD code Fluent.
Common Process of CFD Pre-processing.
Pressure correction method is used widely in many CFD codes.

The CFD pre-processing software GAMBIT was used to build considering the landscape type's downburst CFD computational model.
Then, the established CFD computational model was imported to the calculated hydrodynamics software FLUENT to take the numerical simulation of the downburst under different landforms.
The current domestic and international use of CFD simulations considered the influence of surface roughness, but didn’t make fine-grained roughness, when doing the wind field experiments, Fine attainment roughness has a greater impact on CFD simulation results, its simulation and study to wind field have an important significance.
[3] Yuanchang Deng, Sha Liu, Zhi Yu, Xuelan Zeng , CFD simulation of the actual impact of the wind farm terrain roughness analysis [J] Solar Technology, 2010,31 (12) 1645-1648
CFD simulation of the atmospheric boundary layer: Wall function problems [J].

CFD simulations using SST k-ω turbulence model with Kato-Launder correction were used to examine the physical phenomena occurring on the sectional airfoil of the blade.
Several CFD simulations have been performed to capture the flow fields and the onset of dynamic stall.
Therefore, the present study utilizes the CFD-based simulation to investigate the force hysteresis in terms of lift coefficient (Cl) and drag coefficient (Cd) to observe the dynamic stall behavior on the Darrieus turbine blade.
The CFD package Ansys Fluent 15.0 was used for all simulations.
Conclusion Numerical simulations using URANS–based CFD have been utilized to carry out the investigations of dynamic stall phenomena on Darrieus turbine operation.

Computational fluid dynamics (CFD) simulation analysis of pressure drop in the vertical helical-coil heat exchanger is carried out.
CFD Simulation of Two-phase Flow Pressure Drop The air-water two-phase flow in the vertically helical tube has been simulated using FLUENT 6.2 commercial CFD software.
In order to verify the CFD model, the CFD simulation results are compared with the experimental data in cases of 12 different liquid-gas mass flux combinations.
The following numerical simulation analysis is executed based on this CFD model.
CFD Simulation Results and Discussion Two-phase Flow Analysis.

CFD analysis has been performed for the miniature aircraft.
The simulation of these complex aeropropulsive flows requires enormous computing time and memory.
The direct approach involves full aero-elastic simulation within the CFD run.
Simulation is to be done on the drawn model.
Then the necessary meshing conditions are provided followed by the meshing process. 3) Simulation ANSYS Flent 14 is for the simulation process.

An out-of-core method for CFD simulation in heterogeneous environment Cao Wei1, a, Wang Zheng-hua2,b and Xu Chuan-fu3,c 1School of Computer, National University of Defense Technology, Changsha 410073, China acaowei193@gmail.com, bzhhwang188@sina.com, cxuchuanfu@nudt.edu.cn Keywords: Heterogeneous computing; CFD; Out-of-core method Abstract. .
However, in most computational fluid dynamics (CFD) simulations, the computational capacity of CPU was ignored.
Following this trend, researchers accelerated scientific applications, including CFD applications in the heterogeneous environment.
In order to run bigger simulations, we propose out-of-core method to increase the simulation scale on single node.
And an out-of-core method is proposed to increase the simulation scale on single node.

Methodology The scope of this study includes actual experimental and CFD simulation in LEV.
After actual experiments were conducted, CFD simulations were then modeled and performed.
Air flow of each hood and discharge obtained from measurement were used as boundary conditions in CFD simulation.
After CFD simulations were performed and obtained, the next step is to perform the validity of CFD modeling by comparing CFD simulation results with actual experiment results using absolute error equation as shown below: (1-2) where: is absolute error.
is the absolute difference between CFD simulation values and actual measurement values for variable X.

The key problems of CFD simulation technology are as follow.
Liang Ji had completed the research and made the development of a CFD software—Wind Perfect with a three-dimensional Geographic Information System(GIS) data interface cooperation with Japan's Environment Simulation Ltd in 2008[7].
And then it can be imported into CFD software to calculate.
This method is widely used in the early CFD terrain simulation modeling .When the terrain is relatively flat and small, modeling can be completed more efficiently.
And proportional CFD model is shown as Fig. 5(b).

Fig.1 shows how CFD method proceeds.
Fig.1 Self-propulsion simulation flow using CFD A commercial CFD package, Fluent, is taken as basic solver.
Fig. 4 Architecture of simulation environment Application ：Burst & Coast swimming Burst & Coast swimming of 2D case is applied using CFD method.
Simple CFD simulation is regarded as a dynamic iterative process with fixed parameters.
SU, CFD Simulation of Flow Features and Vorticity Structures in Tuna-Like Swimming, China Ocean Eng., 25:73-82, 2011

The CFD Analysis of Gasoline Engine Turbocharger Compressor Based on NUMECA Xiangling Liu1,2,a, Mengxiang Liu 2,b, Jinke Gong1 1The State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, 410082, China 2College of Mechanical Engineering, Hunan International Economics University, 410205, China axiangling_liu@163.com, bmengxiang_liu@163.com Keywords: Turbocharger, Compressor, Gasoline Engine, NUMECA, Numerical simulation, CFD Abstract.
CFD Analysis of Compressor Impeller The Finite Element Model.
CFD Simulation of Compressor’s Volute Flow Passage Speed, Pressure and Entropy Simulation of Volute Flow Passage.
Pressure Loss Simulation of Compressor’s Impeller.
Starting conditions, boundary conditions and mesh generation are the same as CFD analysis of compressor impeller.