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Introduction With the development of computer and Computational Fluid Dynamics (CFD) technology, the application of numerical wind tunnel in engineering becomes more and more widespread.
Because of these advantages, numerical wind tunnel is becoming an important method in numerical simulation of wind load and wind environment [1].
References [1] J.FRANKE, C.HIRSCH and A.G.JENSEN: Recommendations on the use of CFD in wind engineering( Belgium 2004)
[4] Fujun Wang: Computational Fluid Dynamics-CFD theory and application, edited by Qinghua university Publications, Beijing(2004)
[14] Information on http://cfd.me.umist.ac.uk/ercoftac.

Tank working principle and simulation scheme Tank working principle.
Simulation scheme.
CFD simulation analysis of the original tank Simulation process.
CFD simulation analyses of the improved structures Fig. 4 The structure of scheme 2 Triangle area Circular through-hole Improved structures Brake return oil dissipates heat through two ways in tank: one is conduction with the low temperature oil in tank; the other way is the convection exchange with the wall.
Improving the Hydraulic Efficiency of Water Process Tanks Using CFD Models [J].Chemical Engineering & Processing, 2008(8):1179-1189

The simulations are performed in ANSYS FLUENT14.
Simulation is based on the criterion which identifies the emergence of non-Darcy flow.
While considering porous media simulations, a porous material is defined as an adsorbent used in the simulation.
For Computational Fluid Dynamics (CFD) modeling approach towards fluid flow in porous media, John White used the extended Darcy model to predict the resistance caused by the medium [4].
Shariff., Modeling and Simulation of Fixed Bed Adsorption Column using Integrated CFD Approach, Journal of Applied Sciences 10 (24):(2010) 3229-3235

Use of CFD for simulation of turbulent flow in stirred tanks can generate useful data to study flow behavior, circulation patterns, vortex structures, etc.
In this paper, we present CFD simulations for flow field in a fully baffled vessel stirred by a pitched blade turbine.
Geometry of the model CFD simulations were performed in a T=0.124 m i.d. cylindrical tank that was filled with Chinese herbal medicine water extract(ρ=1025 kg•m-3, μ=2.2×10-3 Pa•s) up to a height of H=0.1 m, equipped with a three-bladed 45°pitch blade impeller and four baffles.
Fig.3 Average velocity of cross section Comparison of simulation and experiment data.
CFD analysis of turbulence in a baffled stirred tank, a three-compartment model.

Analysis and Simulation of Flow Field in the Ultrasonic Auto Backwash Filter Jun Xie1,a, Lijun Shan2,b 1School of Mechanical Engineering, Dalian Jiaotong University, China 2School of Mechanical Engineering, Dalian Jiaotong University, China a xiejun420123726@hotmail.com, b S2002LJ@yahoo.com.cn Keywords: Ultrasonic filter, Numerical simulation, CFD, Flow field, Solid-liquid Separation Abstract.
In this article, we analyze internal flow field of the filter by computational fluid dynamics (CFD), and research the influence of flow field by operating conditions of the filter and internal structure, for providing theoretical basis for the design of high efficiency filters.
Conclusions (1) Flow field in the filter is analysed by using CFD, then we can know pressure of flow field, velocity distribution, and differential pressure on both sides of the filter cores.
References [1] F.C.Zhang: Study of Numerical Simulation of Multi-tube High Efficiency Particulate Air Filters (MS., Donghua University, China 2006)
[5] Z.Z.Han, J.Wang and X.P.Lan: Simulation Examples and Application of FLUENT (Beijing Institute of Technology Press, China 2004)

Through spraying tests, rotating erosion-corrosion tests and numerical simulations using computational fluid dynamics (CFD), abundant research results have been obtained about the corrosion resistance and liquid-solid erosion characteristics of tubing materials.
The CFD simulation of the flow characteristics of the partial trapezoidal threads and the special threaded joints of tubing was carried out [5].
In this paper, CFD numerical simulation was carried out to study the gas-liquid erosion-corrosion characteristics of special threaded tubing joints with corrosive medium in high productivity gas wells.
Simulation Results and Analysis For the tubing threaded connection structure in Fig. 1, the numerical simulation of methane-water two-phase flow was carried out using mixed velocity 3.9 m/s and 6.3 m/s.
Conclusions The CFD numerical simulation has been carried out for gas-liquid erosion-corrosion problems at the threaded connection of the special threaded joint in high yield gas wells with corrosive medium. 1) Based on the Euler-Euler multiphase flow model, the gas-liquid two-phase flow field and the volume fraction distribution of CO2 and water have been obtained.

The Fluent is a powerful commercial CFD software [2, 3].
When the pressure and density of gas is too low, the gas itself does not satisfy the continuity hypothesis, thus it thoroughly subverts the foundation of the CFD simulation.
Therefore we can use the Fluent software to do simulation.
If they are nearly same, it means that the simulation result is correct, and thus indirectly proves that the Fluent simulation is feasible.
In the CFD simulation, this property of the pump inlet should correspond to the constant velocity boundary condition or the constant volume flow rate boundary condition.

Numerical simulation for solid–liquid two-phase flow in stirred vanadium leaching tank Kong Jian-yi a ,Wu Zong-wu b ,Hou Yu c ,Wang Xing-dong d Wuhan University of Science and Technology, Wuhan, 430081, PR China a 13607158659@139.com ,b15971432396@163.com , c249732412 @qq.com, d442309012 @qq.com Keywords: leaching tank;solid-liquid two-phase flow;turbulence;turbulent kinetic energy Abstract.The flow field in the leaching tank for the vanadium extraction in the stone coal was simulated by the Computational Fluid Dynamics (CFD) software.
The simulation results have certain reference value for the research of the law of the inner flow field so as to optimize its structure in the stirred reaction vessel.
The stirring speed is 100 r/min in this simulation.
Fig.2 Mesh Graph Numerical Simulation Strategy Simulation Method.The Reynolds Number in the stirred tank was calculated by the formula “”.
[2] Wang Fu jun.Computational fluid dynamics analysis-Principle and application of CFD software[M].Beijing:Tsinghua University Press,2004 [3] Zhu Rong sheng,Li Wei bing,Huang Dao jian,etal.Numerical simulation of mixing flow field in the blender[J].

Based on CFD, the flow field was calculated and analyzed with different quantities of horizontal deflectors and inclined deflectors in the separator.
CFD Computation and Analysis of Separator Analysis of Horizontal Deflectors’ Effect.
Fig.5 CFD Computing Graph When the quantities of Inclined Deflector is 3 a.
The optimal quantity is 3 by simulation in this paper.
Numerical simulation and experimental study on flow field of gravitational separator.

Numerical simulation Recently, efforts are being made to compare the experimental results with numerical simulation to give accurate results.
Computational Fluid Dynamics (CFD) is a tool which can substitute the experimental wind turbines for flexibility in modeling and simulations.
CFD modeling provides a good description of flow field variables, velocities, pressure, or torque [11].
Wind turbine.The main objective of the present work is to perform the CFD modeling and simulation of wind and the analysis of Savonius type turbines for wave energy conversion.The various parameters effects the wind turbine performance is shown in Fig.1(b).
[11] F.J Wang.Computational Fluid Dynamics--CFD Software Principles and Applications.