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All these computational process is carried on by CFD commercial code FLUENT 6.3.
Validation of Simulation Results Fig. 6.
Fig. 6 shows that the results of 3D numerical simulation and the experiment are closer, however 2D numerical simulation results are still in the range which is allowed in engineering and 2D simulation also has economical cost.
Summary 2D and 3D numerical simulation by commercial CFD code FLUENT 6.3 of different inlet velocity is performed and resistant characteristic experiment is carried out. 2D and 3D numerical simulation results agree well with data of resistant characteristic experiment and multipoint pressure measurement.
The Numerical Simulation of Marine Moisture Separators.

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.

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.

Through the simulation and calculation of the flow field of oxidation ditch that pushed by the blade, based on the fluid-structure interaction analysis, the reliability of the impeller blades has been studied.
Fig.3 Velocity vectors of the flow field Fluid-Structure Interaction Analysis 3D-Model Meshing for CFD Meshing for FEA CFD Calculation Calculation Result of CFD Static Analysis of FEA Calculation Result of FSI Fig. 4 The new curved impeller coupling analysis flowchart In this paper, the one-way fluid-structure interaction method was chose to analyze the fluid situation on the impact of the new curved blade, the flowchart is shown in Fig. 4.
Conclusions In summary, based on the model of inverted umbrella aerator surface impeller of a unidirectional fluid-structure interaction simulation, the analysis and calculation results can be obtained to meet the design requirements, which have a certain guiding significance for optimization design and operation of the new curved inverted umbrella aerator impeller.

In order to examine applicability of the Reynolds-Averaged Navier-Stokes （RANS）using Reynolds Stress equation Model (RSM) and the Large Eddy Simulation (LES) in numerical simulation of centrifugal pump, a series of 3D numerical simulation at the design point and at six off-design points were carried out with the two methods.
Therefore, the computer resources, not propose the Large Eddy Simulation (LES) method in numerical simulations of centrifugal pump.
Introduction In the process of using CFD software to simulate the flow field of centrifugal pump, choosing a proper method that can describe turbulent flow phenomena in centrifugal pump is extremely important[1,2].
LES is a turbulence numerical simulation between the direct numerical simulation (DNS) and RANS [5].
With the rapid advances in computer hardware, the LES study and application become one of the hotspots of CFD [6-8].

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.

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.

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].

Controlling Model In the course of numerical simulation, the k-ε model is adopted.
Numerical Simulation[7-10] Boundary Condition, Dispersing and Messing.
Before CFD computing on special problem, calculating area must disperse by messing.
Numerical Simulation.
Wang: The Principle and Application of CFD Software (Tsinghua University Press, China 2004) [10] Z.Z.

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