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However, with the fast development of computer technology and computational fluid dynamics (CFD) during the past two decades, numerical simulation has become one of the common methods used to investigate the fluid-structure interaction problems.
Currently, RANS codes are becoming more and more popular in VIV simulations.
Simulations of 2-dof circular cylinder at low Reynolds number are performed.
Journal of Southeast University (Natural Science Edition), Vol. 35, SUP Ⅰ (2005), pp. 35-39 [17] Xu Feng, Ou Jin-ping, Xiao Yi-qing: CFD numerical simulation of flow-induced transverse vibration of a square cylinder.
Journal of Harbin Institute of Technology, Vol. 40, No. 12 (2008), pp. 1849-1853 [18] Xu Feng, Ou Jin-ping, Xiao Yi-qing: CFD numerical simulation of flow-induced vibration with different cross-section cylinder.

At last the numerical simulation results are verified by experiment.
Numerical simulation mainly use the software of CFD to simulate the two-dimensional or three-dimensional wake of wind turbine .Some researches using actuator disk method in which the body forces represent the blades of the wind turbine.
Linlin Tian etc. put forward a method of combining the theory of CFD and the actuator disk [4].
Numerical Simulation Numerical simulation mainly aimed at the 100W wind turbine, and had a diameter of 1.07m.
And the numerical simulation results are verified by experiment.

This paper presented simulation analysis of pressure distribution along a mixing blades propeller used in biodiesel reactor tank.
ANSYS FLUENT software was used to run the simulation.
The result obtained from the simulation is agreed well with the published data.
(a) Three bladed mixing propeller (b) Pitch turbine blade (c) Rushton blade Fig. 1: Mixing propeller in biodiesel reactor (a) Three bladed mixing propeller, pitch turbine blade (c) Rushton blade The CAD model was created in Solidwork 2012 and transferred to FLUENT workbench for boundary setup and solving the simulation.
Nienow, The effect of size, location and pumping direction of pitched blade turbine impellers on flow patterns: LDA measurements and CFD predictions, Institution of Chemical Engineers, Trans IChemE, Vol 79, Part A, November 2001

Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems that involve fluid flows.
Fig.1shows the configuration of the CFD model.
Fig. 1CFD model and mesh Fig. 2 Stream lines of flow direction The simulation results in Fig. 2 show that the velocity flow field was very symmetrical and beautiful.
Velocity distribution will be shown at line 1, line 2, line 3 and line 4 The computational fluid dynamics simulation was run with no-slip conditions at the wall and witha pressure outlet at the orifice.
In the case of 1 m diameter cylindrical vortex basin, computational fluid dynamics (CFD) and experiment using the model indicate that the suitable outlet diameter was in the range of 0.2-0.3 m.

In this paper, we study the temperature and pressure distribution within the tunnel oven by the commercial CFD software-fluent. while the temperature of the vials, the heating process of the bottles in the tunnel oven.
CFD simulation of tunnel oven The boundary conditions and parameters setting.
Conclusion Through simulation, verification laminar flow tunnel oven can satisfy the GMP requirements, while comparing multiple simulations under different wind speed, get a optimum speed range of hot air.
But the simulation of the tunnel oven is a very complex process, in this simulation, the model was simplified at some extent, without considering the greater impact of the cooling zone and the preheating zone to the sterilization section in the practical production; And the differences the conveyor belt and insulation material will certainly affect the results; some of the parameters in simulation are set some experience date from the practic production, we should to further improve in order to ensure data accuracy.
Multi-belt dryer CFD simulation and wind field test [J], Drying technology and equipment, 2007,5 (1) :15-21

Numerical Simulation of Diesel Ignited Natural Gas Engine Based on the Finite Volume Method Yu Hongliang1, a *, Xing Fengsuo1, b,Duan Shulin2,c 1 Dalian Ocean University, Dalian, Liaoning, 116023, China 2 Dalian Maritime University, Dalian, Liaoning, 116026, China ayuhongliang19852@163.com,bxingfengshuo@dlou.edu.cn,cduanshulin99@yahoo.com.cn Keywords: the Finite Volume Method,Natural Gas Engine,Numerical Simulation,Diesel Ignited Abstract.
This paper built a finite volume combustion model of Diesel ignited natural gas engine by AVL FIRE software, based on the finite volume method and a natural gas engine emissions test data, then numerical simulation of the combustion process that the diesel ignited natural gas was carried and analyzed the combustion and emission characteristics of natural gas engines.
K-zeta-f two-equation turbulence model was selected to simulate cylinder flow field of the internal combustion engine in the CFD software[2,3].
In this paper, the object of simulation was a marine diese ignited natural gas engine.
CFD in IC- engine spray and combustion simulation: Current status and future development.

Based on FLUENT numerical simulation, the effect of windscreens on wind resistant capability of the running trains is studied and the economic and effective countermeasures of the wind-resistant problems are put forward.
Aerodynamic Optimization of the Bridge Windscreen Computational Analysis of the Two Dimensional CFD.
Only unilateral windscreen is studied in the three-dimensional simulation.
Fig. 7 Wind critical overturning speed of the train Conclusions Based on CFD simulation of the windscreen, it could be concluded as follows: (1) The drag coefficient and the moment coefficient are key parameters to estimate the stability of the train under the action of wind.
Computational fluid dynamics analysis-principle and application of CFD software [M].

So, to handle with the CFD problem using LBM, there is just need to solve streaming and colliding function.
For some simulations, modeling the flow in a right way or not is depended on the implementation of boundary condition.
Lid-driven cavity flow problem is a benchmark problem to validate novel CFD algorithm and provide theoretical basis for some engineering design.
And, the simulations of lid-driven cavity flow with different inflow angles are implemented in section 3.
The implementation of boundary condition in D3Q19 LBM is critical for simulation.

CFD Numerical Simulation Establishment of the Physical Model and Mesh.
CFD Simulation.
With air-water as the simulating media, the average of the continuity equation and the NS equations were created by commercial CFD software—fluent.
The velocity distribution near the wall is obtained from the simulation results of the speed of images.
The liquid flow in this area is therefore read according to the simulation result.

Therefore, the numerical simulation of air-wake around decks is very important for the development of large warships during the war.
Introduction There are three ways to study the air-wake around ships, full scale measurement, wind tunnel test and numerical simulation.
CFD method has solved the drawbacks with the development of the computer technology.
In the study of the air-wake around large warship deck, the CFD method will be more and more widely used with the improvement of the counting ability.
Reference [1] Qu Fei, Lu Chao and Jiang Zhi-fang,CFD Numerical simulation of ship airwake, Chinese Journal of Ship Research, vol. 4., pp.23–27,October 2009