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Introduction Changes of air-flow field depends on a number of factors, as the form of superstructure, the change of the relative wind direction and speed[1], There are a lot of experts who have studied at home, such as Jiang Zhi-fang in Chinese ships research center and Lu Chao do a lot of research work in this area, at the mean time they achieve good effect, so that can prove CFD method can accurately predict the ship’s air-flow field, but the analysis of the change of the movement of air-flow field in the wave is still in the preliminary stage at present.
In this paper, we will use of FLUENT software to calculate the movement of air through the ship from the deck of the current field, we will take the Nimitz Class Aircraft Carrier in the United States for reference, we set up with the original ship 1:1 model for numerical simulation analysis, emphatically analyzed the wind condition when the ship motion in waves at the 3 degrees and equilibrium position, the effect on the flow field on the deck and through the numerical analysis of the results and the image display airflow field under three kinds of motion characteristics are compared and evaluated.
The Numerical Simulation The relative wind speed in air inlet is V=15.43m/s，（It equal to the speed of 30 knots），set the wavelength of the waves=150m， height A=3.5m the size of hull pitch is 2.5 degrees，time step is 0.005 s，the iterative calculation of 15000 time steps，Every 500 time step to save time.
Pitch angle of degree simulation analysis.
[2] 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

In the past two decades, significant progress has been made in the mathematical modeling of the hydrocyclone process based on computational fluid dynamics (CFD) techniques [3-5].
Geometry of the Simulated Hydrocyclone The dimensions and mesh of the hydrocyclone used in the numerical simulation work are shown in the Fig. 1.
This mesh presented good predictions and reasonable computational time for simulations.
Simulation A commercial solver (ANSYS CFX® 10.0) was used to obtain the numerical results.
Yu: in 3rd International Conference on CFD in the Minerals and Process Industries, Vol. 1 (2003), pp.371-376, Melbourne, Australia.

Numerical simulation was conducted to investigate the effect of dislocation angle of twisted tapes on the thermo-hydraulic performances.
The computational fluid dynamics (CFD) software package FLUENT 6.3 was applied to solve the mass, momentum, energy and species conservation equations The second-order upwind scheme was used to discretize the model, and the “SIMPLE” algorithm was employed to couple the pressure and velocity.
Convergence of the CFD simulation was judged based on the residuals of all governing equations to be less than 1.0×10−6.
Therefore, reasonable accuracy can be expected by the present numerical simulation.
Eiamsa-Ard, in: Proceedings of 4th International Conference on Computer Modeling and Simulation, Vol.22 (2012), IACSIT Press, Singapore

Most of the experiments use the principle, and makes simulation tests relative to inside of proportion nozzle model.
There are few literatures basically that apply CFD methods for synthetic air flow-field.
This is because the use of UDF makes the function of main nozzle in synthesis air-flow decrease, and the follow-up flight of weft mainly depends on air-flow from auxiliary nozzles, which is consistent with relay-weft-insertion principles in air-jet looms [8]. 4 Conclusions From the results and analysis above-mentioned, the following conclusions can be drawn: (1) For synthetic flow-field of main and auxiliary nozzles in air-jet loom, it is feasible to make numerical simulation analysis by using CFD combined with experimental verification.
(3) Best spray angle of auxiliary nozzle is set by the combination of numerical simulation and experimental studies.
(4) For the numerical simulation of synthetic airflow field, boundary condition setting is particularly important and should better combine with the actual situation as far as possible.

The simulation results is reasonable according to the facts.
Horinouchi studied the numerical simulation of the cavitation of the orifice and carried out the noise test.
Gao observed the cavitation of the ball valve through the visualization method and compared the observed results with the simulation results [3].
Fig.1 Structure of typical V-type orifice This paper adopts CFD to analyze the flow characteristics of the V type orifice, uses the cavitation model which is based on the stress criteria considered the bubble dynamics and incompressible gases to estimate the cavitation.
Simulation and analysis This paper uses CFD software- FLUENT to simulate the flow field of the V-type orifice shown in Fig.1.

The simulation results are used to analyse the thermal characteristics of the motor.
Furthermore, the thermal characteristics of the motor are predicted using the CFD method.
The electromagnetic (iron and joule) losses are estimated using a 2D-FE simulation.
These are then used to assess the thermal field during a 3D-CFD conjugate heat transfer analysis.
Avanessian, CFD simulations of electric motor end ring cooling for improved thermal management, Science and Technology for Energy Transition, 77 (2022). https://doi.org/10.2516/stet/2022015 [8] C.

asonghaow@hotmail.com, bkatamaybus@hotmail.com, cleowu@moldex3d.com,dtranmanh12@gmail.com Keywords: Re-design, Virtual Manufacturing, CFD, Moldex, Simulation, Plastic Injection Abstract.
With the reverse design method, the real geometry after manufacturing process (by simulation) was predicted.
Based on the results from simulation, it is clear that 4 pin gates are better choice.
In conclusion, original designed parameters could be modified, with the help of virtual manufacturing (by simulation) to make the assembly more accurately efficiently.
Conclusions This study is using reverse design method to calculating the real geometry after manufacturing process (by simulation).

Numerical Simulation of the Flow Field for Rotor Ventilation System of Large-scale Nuclear Power Turbo-Generator Zhang xiaohu 1,a，Hu lei1,b, Yuan jianhua2,c,Yuan yichao3,d 1.
In this article, according to the basic principles of computational fluid dynamics (CFD), ventilation’s structure and performance is analyzed, 3D flow model is also established.
Therefore, adoption of the numerical simulation method for the complex components[8,9] will surely improve the practical application and accuracy of fluid equivalent network calculation method and provide the basis for the optimization of the generator ventilation system.
Study on a ventilation simulation for Hydroturbine generator motor[J].
CFD analysis of Ventilation structure of air cooling steam turbine generator rotor[J].Dongfang Electrical Machine, 2006,34(1): P.41-P.45

This is the significance of the understanding of modeling computational simulations of blood flow and can be expressively achieved by alterations in geometry different.
However the utility of computational flow simulations as a clinical tool is strongly dependent on the sensitivity of the model to the level of geometry definition and flow boundary conditions.
Commercially available software packages are now available for simplify patient geometry [5], but determining the threshold level from medical imaging can influence the geometry of vascular model and result of computational simulation.
Numerical simulations of flow in cerebral aneurysms: comparison of CFD results and in vivo MRI measurements.
Sensitivity of patient-specific numerical simulation of cerebal aneurysm hemody- namics to inflow boundary conditions.

Simulation and Discussions In this section we use ESI-CFD+ software package for simulation.
(a) Pressure simulation result.
(a) Pressure simulation result.
(a) 2D simulation result.
(b) 1D simulation result.