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aqianyiwhu@gmail.com, bTshang56@126.com, c 64673543@qq.com Key words: Residential district, CFD, wind environment, numerical simulation.
The research methods of outdoor wind environment include outdoor measurement, wind tunnel tests and computer simulations based on fluid dynamics (CFD) and so on.
Fig. 1 Satellite image of residential area Fig. 2 Model of the residential district buildings CFD Numerical Simulation: Computing Model, Computational Domain and Boundary Conditions The calculation model.
The termination standard of CFD simulation algebraic equation is determined by continuity equation and momentum equation residuals 1.0 E-3, the energy equation residuals 1.0 E-6.
[2] Shuzo Murakami write, Zhu Qingyu translate: CFD and building environment design, Beijing: Chinese building industry press,2007: P2

Multiphase Flow Simulation and the Analysis Method of the Pressure Drop In the Vibrated Fluidized Bed Baichun Lia ,Wenqiang Linb and Lamei Wang c Liaoning Province, Shenyang City, Heping District，Wenhua Road,Lane 3, No.11,China a baichun_li@foxmail.com, bduli26@126.com,cwlamei@126.com Keywords: Computational fluid dynamics (CFD), Multiphase flow simulation, Vibration fluidized bed, drop, Fluent Abstract.
At the same time based on computational fluid dynamics (CFD), we use Fluent as a tool to carry out the corresponding multiphase flow simulation experiments.
The simulation results have a good consistency with the experimental results.
This paper will combine theory, experiments and CFD simulation of multiphase flow to explore a variety of particle size analysis method in case of pressure drop.
Multiphase Flow Simulation Model.

A study of High-pressure Descaling Nozzle Jet Flow characteristics by CFD simulation Qian CHENG1,Yongli CHEN 1,2,a,Jiao HE1,Chong SHEN1, Hui YAN1, Mingquan WU1 and Liqing CHEN2 1School of Metallurgical and Materials,Chongqing University of Science and Technology,Chongqing 401331,China 2State Key Laboratory of Rolling Technology and Automation,Northeastern University,Shenyang,Liaoning 110004,China achenyongli923@qq.com Keywords:High-pressure descaling,CFD numerical simulation,Oxide skin,Defects.
Introduction In the plate strip rolling process,due to high temperature oxidation,the oxide layer formed on the surface of plate strip.Descaling effect of Iron and steel company is generally poor at home and abroad,resulting banded oxide skin in surface of steel strip, oxide pock, oxide hang and other surface defects[1,2].This issue has become a swimming forever hidden pain in the head of steel company[3,4].Therefore,getting Jet flow field of the nozzle and affect factors of the external flow, is an essential problem to be solved.In this paper, using the finite element method for fluid dynamics simulation and Fluent and Gambit software for finite element numerical solution to explore jet flow field and the influence factors.
Experimental materials and methods The simulation of high-pressure water jet flow field of nozzle is the study of two-phase distribution of gas-liquid in the standard atmospheric pressure,Therefore, Selected calculation model is pressure-velocity coupling model.Figure 1(a) is Gas-liquid two-dimensional model of external flow.model specific parameters are as follows:Entrance speed:200m/ s;Entrance pressure:20MPa;Exit pressure:0.101 MPa (1atm),the unit of exit pressure: Kg/s;Select the triangle mesh,equidistant division.
Figure 3 Velocity vectorof flow field Analysis of velocity change Figure 4 shows the velocity curve of the jet beam along the axis.it can see from the figure, jet velocity remained unchanged in the core area of the jet.When the jet into the transition zone, the jet velocity began to decrease,When the jet nozzle to leave a distance of about 220mm,the jet velocity decreases significantly, the slope of attenuation curve suddenly plunged, here is the basic segment and the dissipation of the line segment, which is the maximum target distance.Therefore,the best target should be near here from this theory.According to the formula-type fluid,it can be calculated that Lopt about 220.2mm[5],that are very close simulation values,so it can be convinced that simulatere result is credible in some extent.
References [1] Li Zheng.Improvement of Water jet and abrasive water jet nozzle.New Jersey Instit- ute of Technology.Vol.12(1994),p.32-35 [2] Schadow K C, Gutmark E,Parr D M,Wilson K J.Selective Control of Flow Coherence in TriangularJets.Experiments in Fluids.Vol.6(1988),p.129-135 [3] B.Rembold.N.A.Adams, L.Kleise.Direct numerical simulation of a transitional recta-nguar jet.International Journal of Heat and Fluid Flow.Vol.8(2002),p. 547-553 [4] H.Liu,J.Wang,N.Kelson,R.j.Brown.A study of abrasive water jet characteristics by CFD simulation.Journal of Material Processing Technology.Vol.6(2004),p.488-493 [5] Michael J.Woodward,Ph.D.An experimental coMParison of commercially available ateady-straight-rattem water jeting nozzle.Vol.6(1990),p.56-59

Gas diffusion is a complex process and CFD has provided the construction and operation modes to make the simulation of the gas diffusions for complex geometries feasible[1,2].
The height of the chimney is set as 30 m during the process of the simulation.
Summary By the application of the CFD software, simulation of the diffusion process of the flue gas in the atmosphere is realized and it no longer stays on the level of the theoretical analysis, which makes the flow field intuitive.
Also, the applicability of the CFD software in the gas flow field is fully demonstrated.
Ruan, CFD numerical simulation of gas diffusion, Journal of Safety and Environment. 26 (2002) 21-23

Simulation Research on Mixing Structure of Kitchen Waste Biological Processor Song Lin*1, a, Ran Zhang1, b, Zhuang Ma1,c, Chuanyang Liu1,d 1Department of Mechanical and Electrical Engineering North China University of Technology, Beijing, China alinsong@ncut.edu.cn, bverus2@163.com, c1271991056@qq.com, d852970697@qq.com Keywords: Mixing Structure, Kitchen Waste Biological Processor, CFD, Simulation Abstract.
The Simulation of Mixing Structure Using the CFD simulation software to research the mixing structure of the kitchen waste biological processor can reduce the times of experiment, save money and time, and solve some difficult problems restricted by experimental techniques.
Simulation in Fluent.
Intuitionistic and credible simulation results can be got by using CFD software.
Simulation and Optimization in Stirred Tank for High Viscosity Fluids [D].

With the computational fluid dynamics (CFD) and computational structural mechanics (CSD) and the development of high-performance computers, numerical simulation based on a high fidelity physical model of CFD / CSD coupling methods will become most credible methods on aeroelastic analysis [1,2].
Computational Aeroelasticity (CAE) ,represented CFD / CSD coupled numerical simulation methods, has become one of the significant progress over the past decade in the field of aeroelasticity [3].
Although the aeroelastic control equations can be solved by CFD / CSD coupling method , but high-order models and large-scale mass data provided by numerical simulation of complex systems make costly compute , engineering applications subject to certain restrictions.So in the mid-1990s, in order to solve the problem for which CFD / CSD coupled numerical simulation method for calculating aircraft aeroelastic analysis shortcomings too expensive, funded by NASA and the U.S.
Transonic aeroelastic simulation for instability searches and uncertainty analysis Progress in Aerospace Sciences 2011, 47: 392-423 [3] Dowell E H.
Discrete-Time Linear and Nonlinear Aerodynamic Impulse Responses for Efficient CFD Analysis [D] .PH.

Keywords: high low temperature radiator group; double side simulation; procedure calculation; wave distance combination Abstract: Establishes 3d numerical simulation model of water side and air side for ribbon-tubular radiator, studies effect of air velocity on air side heat transfer capacity and drag characteristics by using CFD method, based on double side 3d simulation result, and then calculates the import and export water temperature of the high low temperature radiator group with procedure.
This paper uses the method of combining the double sides CFD simulation and procedure calculation to research the influence of wave distance matching to high low temperature radiator group heat transfer properties.
Thermal-hydraulic CFD study in lower-fin and flat-tube heat exchangers [J].International Journal of Refrigeration，2004，27(4):422-432
[6] Martello F. engine cooling radiator-performance evaluation based on CFD approach[C] VTMS6,c599/072/2003:727-736
CFD Simulation of Flow and Heat Transfer in Airways[J].2001

Analytical computations and computer based CFD simulations were carried out on the basis of 3DOF models of two training ships – a VLCC and a Passenger Car Ferry.
Suction forces and moments are determined on the basis of analytical calculations or simulations in Fluid Dynamics Computer (CFD) programs.
CFD (Computational Fluid Design) simulation method.
Computer Fluid Dynamics (CFD) commercial programs are based on solving conservation equations for mass and momentum.
This is the aim of usage of Volume of Fluid (VOF) model to describe free surface problem in CFD computer program.

axochitlmoran@gmail.com, bjose.luna@correo.buap.mx, caprezasies@gmail.com, djose.hernandez@correo.buap.mx, epathaym@yahoo.com Keywords: SRO, HF-CVD, simulation, CFD, Thermodynamic Analysis Abstract.
S. et. al. used a CFD simulation to optimize the deposition parameters of diamond films in HFCVD reactor, the temperature, pressure, and distance between the filament and the the susceptor were considered [10].
The model parameters of the 2D HFCVD reactor simulation.
Conclusions The CFD simulation of the HFCVD reactor for studying the optimal conditions of the deposit process of the SRO films with a 2D model was developed.
Kim, “CFD Simulation of Chemical Vapor Deposition of Silicon Carbide in CH3SiCl3-H2 System, Curr.

Analysis of a Control valve’s Inner Flow Field Characteristics Based on CFD Wang Liang Beihang University Beijing, 100191, China ad.wang@qq.com Keywords: CFD; Control Valve; Inner Flow Field Abstract.
And with the rapid development of the computer and CFD (Computational Fluid Dynamics), the numerical simulation, whose superiority is more and more obvious, has gradually become a very important adjunct to the engineering design.
CFD method can regulate valve internal flow field.
Direct numerical simulation, large eddy simulation and unsteady Reynolds·-averaged Navier-Stokes simulations of periodic unsteady flow in a low—pressure turbine cascade：A comparison[J].
Large eddy simulation of turbulent flow inarotating pipe[J].