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CFD numerical simulation.
But the initial conditions of these CFD simulations were all assumed ideally.
Another method based on CFD simulation can also get downburst wind speed profiles associated with the assumed and ideal initial downdraft entrance parameters.
CFD numerical simulation method The solver of the large general-purpose commercial computational fluid dynamics program FLUENT 6.2 is used in the CFD simulation.
The top of the CFD domain is set on the height of 1750m where sinking speed reaches the maximum according to the simulation results of cloud model.

Basic idea A. the periodical snapshot output in CFD simualtion In the typical CFD simulation, the simulation time is discretized into multi time steps on time dimension, and the simulation process runs in time-stepping style.
Thus, the total output file size in CFD simulation varies inversely to the write interval.
The large-volume file write is always a challenging problem and seriously affects the simulation performance of the whole CFD simulation.
Most of the CFD simulations adopt floating-point data type, such as float or double.
Conclusion We have proposed binary non-typesetting format optimization method based for the problem of periodical large volume snapshot output in CFD simulation on the feature of CFD simulation.

Time-Accurate Simulation of Longitudinal Flight Mechanics with Control by CFD/RBD Coupling Dong Guo1, a, Min Xu1, b, Shilu Chen1, c 1College of Astronautics, Northwestern Polytechnical University, Xi’an, P.R China aguodong@mail.nwpu.edu.cn,bxumin@nwpu.edu.cn,cchenshilu@nwpu.edu.cn Key Words: Numerical Simulation, CFD/RBD, Multidisciplinary Coupled Abstract.
The current paper describes work to put in place a CFD based simulation of flight mechanics.
Fig. 2 CFD/RBD coupled numerical simulation flow chart The detail coupling algorithm is: a) The CFD solver computes a set of aerodynamic loads based on the mesh at a new time step; b) The RBD solver uses the aerodynamic loads from the CFD solver to compute the flight mechanics model; c) Update the fluid mesh based on flight dynamic response and control deflections, and then send the updated mesh to the CFD solver.
Using CFD/RBD results to generate aerodynamic models for projectile flight simulation.
Simulation of Maneuvering Flexible Aircraft by Coupled Multibody/CFD.

Research on CFD Simulation of the Cement Slurry Mixer LI Shuiping1,a, YUAN Yali1,b and SHI Lugang1,c 1School of Mechanical and Electronical Engineering, Wuhan University of Technology, Wuhan 430070, China alshpmail@163.com, byyl.1987128@163.com, clugangjx@163.com Keywords: CFD analysis method, cement slurry mixer, flow field simulation Abstract.
Process of CFD Simulation of Jet Cement Slurry Mixer by FLUENT The Mechanical Structure Design of Jet Mixer.
Fig. 1 Structural diagram of the new jet mixer Fig. 2 The mesh model of the mixer CFD Simulation of the Mixer.
The CFD simulation results above show that the mixer can not fulfill the need of pulping, so the parameters should be modified to obtain reasonable structure.
Summary Through numerical simulation, CFD method can help designers understand the performance of the mixer.

Validation of CFD Modeling and Simulation of a Simplified Automotive Model S.Mansor1, a, N.A.R.
Thus, numerical method such as Computational Fluid Dynamics (CFD) simulation plays an important role here.
Hence, k-ω SST turbulence model has been chosen for all CFD simulation in this paper.
Thus, CFD simulation generated flow structure has been validated with the experimental results.
All the CFD Simulation results have been well validated with the experimental results.

Method of fluid dynamics numerical simulation and CFD related theory are discussed in the paper.
Although the CFD simulation can't replace wind tunnel test at present, but it can provide reference for engineering design, and has important realistic meaning [1~2].
Simulation of Wind Pressure for Self-stayed Rod Based on CFD Full scale modeling was established by preliminary treatment software of Gambit.
Summary Based on the general software FLUENT of CFD, simulation analysis on self-stayed rod is discussed in this paper.
The contrast of the numerical simulation results and the load code for design of building structures indicate that simulation of wind pressure for self-stayed rod based on CFD is technically feasible and practical application may still need to be further perfected.

The characteristics of flow field in the KYF-0.2 flotation cell are studied by CFD, and PIV test is also carried out to verify CFD simulation results.
Standard K-ε model is a common choice in CFD simulation in flotation cell.
Comparing CFD simulation and PIV measurement, the results are fundamentally consistent, but the position of upper and lower circulation and velocity value still exist slight differences, Therefore it is necessary to correct CFD simulation strategy and increase accuracy in PIV measurements.
CFD simulation and PIV measurements can be used for revealing flow flied characteristics in flotation cell.
Numerical Simulation of Fluid Flow in Stirred Tank Reactors Using CFD Method[D].

The Optimization on Grid Division Methods of Blade Pump Blades Based On CFD Dangqin Xue1,2,a,Deyong Lv2, Jiaxi Zhang3, Shulin Hou 1 1 College of Engineering ,China Agricultural University, Beijing,10083,China; 2 Nanyang Institute of Technology, Henan Nanyang, 473004 China 3 Institute of Agricultural Mechanization, Xinjiang Adademy of Agricultural Sciences, Urumqi 830091,China) a E-mail:xdq5599@163.com Keywords: CFD; Numerical Simulation; Grid Division Abstract: Grid division is the geometric expression forms and vectors of CFD numerical simulation engineering problems.
The quality of the grid has an important impact on the CFD accuracy and computational efficiency about CFD.
So mesh generation is a key link to numerical simulations of flow field.
In other numerical simulation, the boundary layer thickness may be varied, such as carrying on numerical simulation of the large size object.
Research on flow numerical simulation in francis hydraulic turbine and application of CFD software[D].

Experimental and CFD Simulation of a Bubble Column J.A.
Five different diameters of bubbles have been used in the CFD simulations.
The comparisons between CFD simulations and experimental data show that the Eulerian-Eulerian approach provides a computational model that represents the process satisfactorily.
In the simulations, the gas stream was represented by five discrete phases.
These results show a good agreement between experimental and CFD hold-up.

Aircraft-carried aerosol Sampling Inlet by CFD simulation Baoqing Wang1,a, Yuhong Liu2,b, Shiquan Lan2,c, Shu Yao1,d, Shuai Yin1,e 1College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China 2College of Mechanical Engineering, Tianjin University, Tianjin 300072, China awangbaoqing@nankai.edu.cn, byuhong_liu@tju.edu.cn, cyxlx2010@163.com, dmadkon@qq.com, eyinshuai1989@mail.nankai.edu.cn Keywords: Isokinetic sampling Inlet, Aircraft-carried, CFD simulation Abstract.
This study was conducted using the CFD code to perform a turbulent simulation of the airflow on the aerosol sampling inlet.
It is suggested that CFD simulation can be useful for improving the optimum aircraft-carried aerosol sampling inlet.
Fig. 3 Computational domain and boundary conditions of the sampling inlet Results and discussions The results of the CFD simulations were complied and plotted graphically.
While more study is required to do some experiments in wind tunnel to compare with the results of CFD simulation and verify the efficiency of different diameter of particles.