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This paper first adopted POLYFLOW numerical simulation.
POLYFLOW is based on the finite element method of computer fluid dynamics (CFD) software, is used in the viscoelastic material flow simulation, can solve the isothermal/nonisothermal, 2d/3d, steady-state/unsteady flow problem encountered in processing polymer, rubber, food, and glass, is used for the polymer extrusion, blowing, brushing, mixing, coating process of laminar flow, heat transfer and chemical reaction process [2].
POLYFLOW was first used in rubber injection molding simulation analysis in the paper.
Five groups of rubber simulation examples were designed in this paper.
Finite element model For the simulation of filling process, a finite element model must be established.

To reduce the cavitation occurring on valve plate of typical Swashplate piston pump, an optimization design method was introduced to quantitively analyse the accurate relationship between structural jet grooves parameters and cavitation.Using the CFD method, the sunking and discharging process in piston pump was simulated dynamically.The damp groove’s structure effect on both jet angle and pressure shock were analysed visually with a series of different parametrical grooves.By establishing parametrical damp groove model, the piston pumps’ dynamic analysis was integrated with the technologies of CFD analysis, experimental design and approximation model, etc.The mathematical model of plunger pressure in oil back period, jet angle and structural parameters of damp groove were established in the form of second-order RSM model.
Tab.1 Parameters of Valve plate high pressure chamber damping trough model Guide hole diameter Guide hole depth Damped hole diameter Damped hole depth d1 h1 d2 h2 2.2 Result analysis of piston pump CFD dynamic resolution From Fig.3 and Fig.4, it can be easily seen that the diameter and depth of both guide hole and damp hole have a great effect on jet angle.
) (2) Then 20 sets of data are used to revise the RSM model, the model’s accuracy is checked with correlation coefficient R2.The R2=0.987 indicates that RSM model is basically consistent with simulation model and the amount of calculation in optimized design could be reduced by setting the RSM model as the objective function.
References [1] Dheeraj Saxena.CFD Modeling of Cavitation in Axial Piston Pump[D].West Lafayette: Purdue University

Operation Process Calculation Model and Test Many CFD softwares can be used to do research on combustion and emission simulation at present.
The simulation and test data is 321ppm and 353ppm respectively.
The NOx emission simulation result is relatively accurate.
Through conversion, the simulation and test data of Soot emission is 0.48FSN and 0.45FSN respectively, indicating that the simulation can be acceptable.
CFD in ICE Engine Spray and Combustion Simulation: Current Status and Future Development[C].

External Extreme Impacts on NPP Constructions – Methodology of Computational simulation Alexandr M.
Petryashev1,h 1 Department of Computer Science and Applied Mathematics, Research-Educational Center of Computational Simulation, Moscow State University of Civil Engineering (MGSU), 26, Yaroslavskoe Shosse, 129337, Moscow, RUSSIA a, b, c, d, e, f, g. hniccm@mgsu.ru Keywords: Numerical simulation, external extreme loads and impacts, nuclear power plants (NPP), wind hurricane, tornado, plane crash, the impact of the shock wave, seismic loads, tsunami, ANSYS Mechanical, ANSYS CFD, ANSYS AUTODYN, ABAQUS Standard\Explicit, LS-DYNA Abstract.
The distinctive paper is devoted to advanced methods of analysis, choice of appropriate and correct methods and software application packages for numerical simulation of external loads and impacts on the basic structures of nuclear power plants (wind hurricane, tornado, plane crash, the impact of the shock wave, seismic and tsunami effect).
─ ANSYS CFD - the numerical simulation of three-dimensional steady and unsteady fluid dynamics problems of high computational dimension
─ ANSYS AUTODYN and LS-DYNA – simulation of the non-linear high-speed processes, including non-linear dynamic analysis on the explicit integration scheme, which allows to analyze the physical processes: the impact and penetration, explosions, destruction, aerohydroelasticity - with an extensive library of models and materials properties.

Computational Fluid Dynamics (CFD) simulations suggest that multiphase flow erosion may concentrate particle impacts on downstream part of the elbow.
First, the flow of the carrier fluid through the elbow is modeled with the help of CFD.
Eq. 2 is commonly used in both CFD simulations and empirical studies.
(4) A lot of work has been done on the theoretical and numerical simulation of elbow erosion.
Fluid-structure interaction mechanism and numerical simulation of elbow erosion failure.

In the near wall region and airflow separation simulations, the simulation results of SSTmodel are more close to the actual condition compared with standard and RNG models.
Introduction Common methods used to study vehicle aerodynamics are DNS (Direct Numerical Simulation), LES(Large Eddy Simulation) and RANS(Reynolds-Averaged Navier-Stokes) model.
It can be judged the front of vehicle simulation of Standardmodel is distortion.
Conclusions In this study, the CFD analysis of vehicle external flow using the Standard, RNG models and SSTmodel by FLUENT is conducted.
References [1] Fujun Wang：The Analysis of CFD (In Chinese)( Tsinghua University Press, Beijing, China 2005) [2] ANSYS Inc: ANSYS FLUENT 12.0 Theory Guide (ANSYS Inc, USA 2009) [3] F.R.

Quasi-steady Marching-on in Time Approximation Technique of Numerical Simulation of Wind Pressures on Building Zhixiang Yu1a, Yanjun Yan2b , Hao Wu1c 1 School of Civil Engineering Southwest Jiaotong University ,Chengdu, China 2 College of Civil Engineering Tongji University ,Shanghai, China ayzxzrq@126.com, byyj07011100@yahoo.com.cn, c Yong_zhiwu @163.com Keywords: Wind load,Quasi-steady Approximation, CFD, Murakami model, Numerical simulation Abstract.
Introduction Since the 1990s, CFD has been employed to analyze the wind pressure of buildings by many scholars such as Murakami [1-2], Selvam [3-4], Holmes [5].
Hibi, Three-dimensional numerical simulation of air flow around a cubic model by means of large eddy simulation, J.
Panneer Selvam,Computation of pressures on Texas Tech University building using large eddy simulation, J.
Computational fluid dynamics analysis: CFD Software Principles and Applications [M].

Finite element simulation method of random vibration analysis was used for hermetically metal sealing.
According to the using conditions, the hermetically metal sealing ran the random vibration simulation analysis in ANSYS after inputting PSD spectra (Fig. 3).
In order to verify the random vibration damage mechanism, random vibration test of hybrid the hermetically metal sealing was performed, with the same random vibration test conditions and simulation conditions.
The cumulative fatigue damage (CFD) is then written as CFD=i=1nΔDi (2) In random vibration fatigue failure analysis, it is assumed that CFD = 1 when failure occurs.
Simulation of random fatigue life.

Modeling & Simulation of supersonic Flow in 2D Nozzle Using MacCormack’s and Upwind Methods Mohsen Chegeni1, a, Marzieh Ehterami2,b ,Mustafa Hadi Doolabi3,c Mohamad Saleh Soltaninezhad4,d 1,2,3Malek Ashtar University, 4 Amirkabir University, Tehran-Iran amo.che64@yahoo.com, bmarziehehterami@yahoo.com Keywords: Nozzle-MacCormack’s-finite volume method-Characteristics Method-Ausm Method Abstract.
In this work, two-dimensional inviscid supersonic flow in nozzle has been investigated using CFD schemes and characteristics method.
Before analyzing the flow by CFD method, we obtained the ideal nozzle geometry using the method of characteristics for a 2D divergent Nozzle.
As shown in Fig. 3, the CFD schemes and characteristics method and fluent results were compared and we can see that these methods in this case have a good agreement.

Flow Field Simulation of Fan Nozzle Jet used for Disc Tool Cooling with Fluent REN ZhongWei1,a, SONG Ming1,a, LIU YaFei2,b, LUO LiYing3,cand LIU Yang4,d 1Shenyang University of Technology，Shenyang, P.R.CHINA 2AVIC Guizhou Honglin Machinery Co., Ltd, P.R.CHINA 3Urumqi Weian Registered Safety Engineer Office (limited), P.R.CHINA 4Huainan Gede heavy equipment Co., Ltd, P.R.CHINA arzw9811210@163.com, blyf4669656@163.com, cshadow0311@sina.com, d18241515551@139.com Key Words：Nozzle, tool cooling, flow field simulation Abstract.
In order to study the effects of structural parameters on the spray nozzle, simulation and experiments were performed on injection pressure and surface tension and other factors to the ejection performance of the nozzle.
Fig.5 Nozzle velocity curve of internal and external flow field on axis Fig.6 Velocity distribution of nozzle jet in 100mm target distance and the section Conclusion In this paper, fan nozzle as the research object for the disc tool cooling. physical model of fan nozzle was established by the Solid Works software, and the simulation is carried out.
A Study of Abrasive Water jet Characteristies by CFD Simulation [J].
Wang, Analysis of Computational Fluid Dynamics-Principle and Application of CFD Software [M], Beijing: Tsinghua University Press, 2004.