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Fig. 1 3-D model graph Fig. 2 3-D mesh graph Grid Model.The meshing of three-dimensional model is the pretreatment process of simulation analysis and the basis of the numerical simulation.The reasonable design and high quality of the grid is a prerequisite for CFD calculation[4].Grid divided after the geometric model imported into Geometry,which meshing method selected structured mesh and the grid cell selected hexahedral elements.
Simulation Analysis of the Model.According to the principle of oil discharge in the ejector—the greater the negative pressure is, the faster the speed of the oil discharge is—the effect of the discharge of oil is better.
During the simulation, the inlet velocity is 22.2m / s,the outlet pressure is 101325Pa,model iterate to 703 times, converge to 1x10-5,plot of residuals as shown in figure 3,flow field simulation results as shown in Fig.4, Fig.5, Fig.6 and Fig.7.
[2] Zhiyong Sheng,Numerical Simulation and Optimization Study of Small-sized Steam Ejector Ms D thesis.
(In Chinese) [5] Zhanzhong Han , Jing Wang Fluid engineering simulation calculation examples and applications Beijing Institute of Technology Press 2004.

To validate this new lattice kinetic scheme, the numerical simulations of the double-sided square driven cavity flow at Reynolds numbers from 10 to 1000 are carried out.
In the last two decades, a different kind of numerical method for applications in CFD, namely, the Lattice Boltzmann Method (LBM) has gained popularity.
Cogley, Simulation of Cavity Flow by the Lattice Boltzmann Method, Journal of Computational Physics, Vol. 118 (1995) p. 329-347
Dass, Simulation of incompressible flows in two-sided lid-driven square cavities - FDM, CFD Letters Vol. 2 (2010) p. 13-24
Shah, Simulation of incompressible flow in two sided lid driven cavity using upwind compact scheme, CFD Letters Vol. 5 (2013) p. 57-66.

Abstract: In order to conduct lubricating characteristic analysis on automobile continuously variable transmission, this paper divides overall model of transmission on the basis of the idea of blocking simulation.
Through the above definitions, the generated oil gathering CFD model of oil gathering are shown as Figure 6.
Research on Flow Field Simulation for Lubrication System and Effect Evaluation on a 7-Speed Dual Clutch Transmission[A].
[6] Xu Xiang, Bi Xiaoping, Flowing Simulation of Lubrication System for Automotive Arranger[J], Lubrication and Seal, 2006,(2):17-19
[7] Xu Xiang, Bi Xiaoping, Heat Transfer Simulation Model of Transmission Case for Automotive Toothed Gear Drive[J], Mechanical Drive, 2003,27(5):1-4

Improving the efficiency of a hydro-turbine system by vortex generators Huachen Pan1, a, Shuli Hong2, b 1Hangzhou Dianzi University, Xiasha, Hangzhou 310018, China ahuanchen_pan@yahoo.com, bhong_0815@163.com Keywords: Vortex generator, Hydro turbine, Draft tube, CFD Abstract.
First, the performance of the hydro-turbine system was analyzed with a CFD solver under different working conditions.
D., et al. utilized CFD simulations coupled with optimization algorithms to get a shape optimization technique to redesign an existing draft tube[2].
Parameters of Turbine Performances To utilize CFD for hydropower application, a typical way is to ignore the static pressure caused by gravity force to minimize the possible truncation error caused by large pressure gradient.

The simulation was conducted using the RANS k-epsilon turbulence model by Computational Fluid Dynamics.
In this paper, an aerodynamic drag reduction work has been carried out for a compact EV model through shape optimization by Computational Fluid Dynamics (CFD).
a) Pressure contours on the body surface b) Velocity contours at the symmetry plane Figure 6: Pressure and velocity Contours of the original EV model Results of CFD simulations done on a 128-core blade server of Shanghai Automotive Wind Tunnel Center are documented in Table 1.
Almost each refined model has a lower CD which is calculated by CFD than that of the original EV model.
References [1] Zhang Lei, Fang Haifeng, in: Jounal of Automobile and Parts, No.5(48) (2010), p. 38-41 [2] Wolf-Heinrich Hucho: Aerodynamics of Road Vehicles, SAE book No.R-177 (1997) [3] Jeffrey Hoffman, Bill Martindale and Stephen Arnette: Effect of Test Section Configuration on Aerodynamic Drag Measurements, SAE paper (2001), p. 2001-01-0631 [4] Mohammadi, B., Pironneau, O.: Analysis of the k–ε Turbulence Model, John Wiley & Sons (1994) [5] Yang Zhigang, Schenkel Max: Assessment of Closed-Wall Wind Tunnel Blockage using CFD, SAE Technical Paper Series (2004), p. 2004-01-0672 [6] Wang Jia, Yang Zhigang and Zhu Hui, in: Journal of Jiamusi University (Natural Science Edition), Vol. 30(3) (2012), p. 652-656 [7] Wang Jia, Zhu Hui and Yang Zhigang, Numerical Analysis on Effect of Vehicle Length on Automotive Aerodynamic Drag, 2012 IET ICISCE, Vol.1 (2012), p. 169-173

By Computational Fluid Dynamics (shortened as CFD) method, the high relative speed motion model between the blade and air flow is established, the flow field through the blade tip section are simulated, and the instantaneous movement of air flow around the blade can be known.
Yu studied a single-deck mower, and designed the cutter suspension system, analyzed the cutter movement by Matlab software simulation [8].
The cutter deck and the blade are firstly designed, and then stimulated by Computational Fluid Dynamics (shortened as CFD) software called Fluent.
The same can be seen in the simulation, the vortex phenomenon occur close to the blade wall, and there is sudden drop trend for air flow rate, the grass clippings will pile up on the surface of the blade.
Modern computer simulation technology provides an opportunity for the study on commercial lawn mowing vehicle, at least they can provide reliable advice and methods for the production design and manufacturing.

A comparison on the combustion process and characteristic of conventional HBS and HTAC HBS is performed by application of Computational Fluid Dynamics (CFD) simulation model.
CFD Study of HTAC HBS In order to study the combustion features of HATC stove, the physical models of normal dome combustion stove and HTAC stove, as well as mathematic model of turbulent combustion are established.
The temperature distribution, concentration distribution and formation amount of NOx are studied by CFD simulation method.
The combustion characteristics of HTAC stove is studied by simulations of convention dome combustion stove and HTAC stove respectively.
Numerical simulation on influence factors of NOx emissions for pulverized coal boiler.

The fluid domain model of a new oil-air distributor in oil-air lubrication system is built and the phase distribution of oil and air two-phase flow on distribution interfaces is simulated based on the CFD model in Fluent, the mass flow rate of oil and air are collected from three different cross sections when the structures of fluid guidance slot are designed as a plane, sphere and cone shape respectively, then the influence of oil-air guidance slot structure on the performance of distributor is analyzed in the oil-air lubrication system in this paper.
The working principle and simulation model of oil-air distributor The improved oil-air distributor structure is shown in Fig. 1.
Results and discussion In simulation we set that, air density is 1.225and viscosity is ; oil density is 890and viscosity is , in the turbulence model, set ，，，，，.
Conclusion (1) CFD simulation models of the improved oil-air distributor is built, the oil and air distributions of three different oil-air distributors whose oil-air guidance slot are designed as a plane, sphere, and cone have been simulated respectively
Structure Design and Performance Simulation of the Oil-air Distributor[D].

Numerical Simulation and Optimization of Air Distribution in Large Space Zehang Du 1, a, Chunhua Liu 1, b and Guang Zhou2,c 1 College of Shipping and Ports Construction Engineering, Zhejiang Ocean University, ZhouShan, 316022, China 2Tianhe College of Guangdong Polytechnic Normal University, Guangzhou, 510540, China a2271354946@qq.com, bliuzi1001@163.com，czzzg2001@sina.com Keywords: Air distribution; Turbulence model; Numerical simulation; CFD; Hotel atrium Abstract.
Distribution of temperature, velocity on some typical section and the atrium space can be obtained; the result of numerical simulation can be visualized by post-processing module of FLUENT and TECPLOT software.
Numerical Simulation Physical Model The K-turbulence model, a common model in current studies, is used in the numerical simulation.
Simulation Calculations and Results Analysis Perform calculations on the above model, the results are shown in Figure.4-7: Figure.4.
CFD numerical simulation of air distribution and analysis of thermal comfortablity on delaminated air-conditioning system in a large space building.

The CFD analysis has been carried out in CFX software, which is available in ANSYS Workbench 14.In order to apply the spray of diesel fuel and air phases to the program, diesel fuel and air properties from the fuel library were used.
The nozzle geometry used in simulations is shown in Figure 1.
Isothermal conditions are assumed and the temperature used for the simulations was 25 oC.
Results and Discussion The CFD analyses for the three different air inlet conditions are discussed in this section in order to investigate the effects of utilizing different air pressures on mixing characteristics of diesel and air phases.
[10] Fridolin K., CFD for air induction systems with OpenFOAM, Msc.