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An extension of the model to transient flow and two-phase flow simulation has been done to see the effect of impeller rotation and gas entrainment in the centrifugal operation procedure.
Numerical simulations[4-5] show the possibility to investigate the flow pattern and phenomenon occurs during the pump operation.
Simulation Methodology Geometry Model.
The simulation of the three dimensional flow in the pump was done in the commercial CFD package Ansys Fluent 13.
After the stead state flow simulation has been done, the model is further developed to a trasient flow model with a rotation speed of 3000 rpm and a two-phase flow model of 10% air fraction.

This article highlights the use of multi-dimensional CFD modeling for the design of experimental reactor which is used for the decomposition process gases generated by pyrolysis.
For numerical solution of the existing physical phenomena in the reactor, commercial CFD software Fluent was used which is based on the equations describing the transport of momentum, heat and substances.
The model is based on the simulation trajectories of the representative beams that are emitted, absorbed and reflected by the wall surface.
A large-scale benchmark for the CFD modeling of non-catalytic reforming of natural gas based on the Freiberg test plant HP POX.

In this paper, Computational Fluid Dynamics (CFD) is used to analyze the micro self-vibration of aerostatic bearing with pocketed orifice type restrictor as the bearing’s performance is stable and it is widely used ultra-precision equipments.
By using Large Eddy Simulation (LES), time-variation flow field inside the bearing is obtained.
Yoshimura et al [3] brought the outer region of aerostatic bearing into simulation area and took photo the exhaust gas.
Presently, the popular method of researching the micro self-vibration of aerostatic bearing was by static simulation and dynamic experiment.
In this paper, Large Eddy Simulation (LES) is used to analysis the pressure fluctuation characteristics inside aerostatic bearing.

Experimental and simulation procedure Figure 1 shows a schematic diagram of a reactor for the high-temperature gas source method.
A commercial software CFD-ACE+ and add-on software CVDSim SiC Edition were used in simulation analyses of growth rates, depending on the seed rotation speed and temperature distributions in the reactor [4,5].
[4] Information on https://www.esi-group.com/software-services/virtual-environment/cfd-multiphy sics/ ace-suite/cfd-ace/

Study of windscreen Angles on car characteristic Bao Hai-Tao Faculty of Traffic Engineering, Huaiyin Institute of Technology, Jiangsu, Huai’an, 223003 China bht4931530@163.com Keywords: Car, Windscreen angle, Aerodynamic characters, CFD Abstract.
It is proved that the numerical simulation air flow of passenger car is feasible.
With the development of computer and compute technology, numerical simulation of external flow field around vehicle has been performed to study of automobile performances with different front window angles.
The effect of different backlight geometry angel on aerodynamic drag has also been studied by numerical simulations and wind tunnel tests of simplified vehicle shape.
coefficient resistance Windscreen angle Figure4 Results comparison of simulation and experiment Simulations have been carried out for a car with different windscreen angles.

The macromodel has been validated with numerical simulations.
As repeated simulations are required to obtain these numerical solutions, iterative design using numerical simulation is computationally infeasible.
The topologies of micrommixer Modeling methodology Numerical solution of the PDEs Computational fluid dynamics (CFD) simulations were performed with COMSOL, a finite element analysis solver.
Result contrast between macromodel and simulation The results of the macromodel and the COMSOL numerical simulation at the end of the serpentine channels have been shown as Fig.3.
Zhao: International Journal of Nonlinear Sciences and Numerical Simulation Vol. 8-4 (2007), p. 519 [4] Y.

Numerical Simulation Method for 3D Low Speed Micro Flapping-Wing with Complex Kinematics Wenqing Yanga, Bifeng Songb, Wenping Songc, Zhanke Lid and Yafeng Zhange School of Aeronautics, Northwestern Polytechnical University, Xi’an, 710072 China ayangwenqing@nwpu.edu.cn, bbfsong@nwpu.edu.cn, cwpsong@nwpu.edu.cn,dlizk@nwpu.edu.cn, eyawind@nwpu.edu.cn Keywords: CFD, flapping-wing, low speed, complex kinematics Abstract.
A numerical simulation method is presented in this paper for 3D low speed micro flapping-wing with complex kinematics.
The numerical simulations of solving Reynolds Averaged Navier-Stokes equations are used more and more in the flapping wing research for its high precision.
Lin [3] developed a 3D Euler/Navier-Stokes solver for simulation plunging/pitching NACA0014 airfoil.
The chimera system used in flapping-wing simulation is shown in Fig. 1.

The main purpose of the simulation is to assess the stability of the in situ combustion with respect to the unsteadiness induced by the rotor-stator interaction.
Apart from previous attempts, the salient feature of this CFD approach is the new fuel injection concept that consisting of a perforated pipe placed at mid-pitch in the stator row passage.
Fig. 2 Computational domain The simulation was performed within ANSYS CFX environment.
As a first step in the numerical simulation of the in situ reheat, a simple chemistry mechanism has been considered.
Badescu, Numerical Simulation of Turbine 'in-situ' combustion based on multi-step reaction mechanism, SET2006 5th Intl.

Lattice Boltzman Simulations of Cavity Flow using CUDA Xiaoping Li1, a Hongming Zhang2,b and Xiaoxu Zhang2,c 1School of statistics and mathematics, Yunnan University of Finance and Economics, Kunming 650221, China 2Department of Engineering Mechanics, Kunming University of Science and Technology, Kunming 650500, China alxping@myopera.com, bhmzhang8888@126.com, c251809332@qq.com Keywords: CUDA; LBM method; GPU computing; cavity flow Abstract: GPGPU has drawn much attention on accelerating non-graphic applications.A new algorithm on the numerical simulation of Lattice-Boltzmann method (LBM) based on CUDA is studied.The cavity flow is simulated by D2Q9 model of LBM method ,with the non-equilibrium extrapolation method for velocity boundary to deal the wall boundary conditions and using global memory and texture memory to store data.In the model the 9 distribution functions were all stored in the form of two-dimensional grid, each grid is assigned a thread and each thread block
includes 256 threads.The simulation for cavity flow with LBM was carried out by CUDA and NVIDIA GeForce 8600 GT on a PC.The speed is more than 15 times faster than that of the CPU.
Simulations result To compare the performance of the CUDA solver of LBM with the serial C solver,6 cases were taken into count ,each cases are different with the Re,and the simulation result were shown in fig.3.
Conclusion The Simulations get a high precision result,and the comparing the execution time shows that the gpu has high floating point arithmetic capability.and is promising solution in computational fluid dynamics,fot it’s less expensive than cpu.
Our future work is to continue improve the parallel method and apply the solver to our engineering simulation problems.

In this paper, 3D finite element numerical simulation was performed to investigate the flow in one of the vane units with POLYFLOW.
The results show that numerical simulation is an efficient method to optimize process parameters and the structure of vane extruder.
In this paper, 3D finite element numerical simulation was performed to the flow in one of the vane units with POLYFLOW.
The CFD preporcessor GAMBIT was used to generate the finite element model of vane unit.
Energy Consumption Characteristics of Simulation and Study on Uniaxial Vane Extruder [D].