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In this paper a 3D CFD study is performed on Ahmed body to validate simulation parameters based on reported experimental data [1].
Using the validated settings, simulation is done for Evo2.
In order to set simulation parameters in FLUENT, Ahmed body as shown in Fig. 2 is simulated using different turbulence models for different sizes of the virtual wind tunnel for CFD.
These same settings are used for full car simulation of Evo2 and Evo3.
Simulation is performed in CFD lab, Department of Aerospace Engineering IIT Bombay.

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

A three-dimensional simulation model of a float glass-melting furnace including combustion chamber and glass tank is performed in this paper by CFD software Ansys Fluent.
Besides, postprocessing analysis based on CFD simulation is an effective tool for glass quality indication and improvement [5].
In this paper, a numerical simulation of a side-port regenerative type float glass-melting furnace including combustion chamber and glass tank is performed integrally by CFD software.
Fig. 1 A schematic of the float glass-melting furnace Simulation Models and Boundary Conditions The simulation is performed by CFD software Ansys Fluent-14.5, and the submodels applied in the simulation are as follows.
The approach of simulation by CFD software as well as the evaluation methods is a valuable tool in furnace optimization for furnace designers and operating workers.

Fig. 3 The cutaway view of duct BD15 CFD simulation of the high-skew ducted propeller The are many commercial CFD (Computational Fluid Dynamics) softwares, such as Fluent and CFX, which can be used for hydrodynamic calculation of ducted propeller [1~5].
For the high-skew ducted propeller, the CFD simulation had been done with CFX, and its hydrodynamic performance had been gotten, which is shown in Fig. 4-6.
(a) the fluid model for CFD simulation (b) the velocity field Fig. 4 Model and result of CFD simulation for the high-skew ducted propeller The velocity field by CFD simulation showed that some eddys appeared after the hub of propeller.
The open water performance curve had been drawn by results of CFD simulation.
Fig. 5 shows open water performance curve of the high-skew ducted propeller calculated by CFD simulation.

We did the some simulation by CFD software.
Fig.7 Experiment Data with Three Tanks Blowing 3.4 Simulation with CFD We did some simulations with CFD softwares.
So simulation has good accuracy.
Further study of simulation will do with full-scale model.
The simulation research of high pressure air blowing the main ballast tank based on CFD.Ship Science and Technology,2012,34(9):56-60.In Chinese.

Through control variable method, turbulent kinetic energy is simulated by means of Computational Fluid Dynamics (CFD).
The size of flow channel of reactor is set to, for the convenience of simulations, and control variable method is used to strictly compare the simulation results.
Simulation by Means of CFD It is the objective of simulation to optimize the structure parameters and distribution of disturbing Fig. 1 Schematic diagram of two-dimensional photobioreactor devices, and operation conditions in reactor for intensifying turbulence.
The simulation of algal fluid flow is operated with software FLUENT from ANSYS, Inc., USA, Version 14.5.
Conclusions The relationship between the structure parameters of disturbing device, operation conditions in photobioreactor and distribution characteristics of turbulent kinetic energy along the flow direction is concluded by means of CFD simulation, hence optimization of the reactor.

The new design structure i.e.solide catalyst and liquid in a stirred reactor has been simulated using computational fluid dynamics model (CFD).
The agreement between the expetiment and CFD have been testified in mutiple researches[1].
The result of simulation is worthy of trust and help evaluate the value of the effect of new designs.
Simulation method.
The axial flow is obvious in the simulation results.

CFD Transonic Trajectory Predictions of three-store ripple release using Chimera method Ke Xi a, Chao Yanb Beihang University, Beijing, China acauchy86@163.com, bcauchy@ase.buaa.edu.cn Keywords: CFD, ripple release, Chimera method, unsteady, store separation Abstract.
The simulation of aerodynamically driven, moving-body problems, such as store separation, maneuvering aircraft, and flapping-wing flight are important goals for CFD practitioners .
Time step is chosen for the convergence of store-separation trajectory simulations with a 50 substeps.
In the simulations, the ejectors are defined fixed relative to the stores so that the ejectors will not create a rolling moment due to store motion.
CFD Wing/Pylon/Finned Store mutual interference wind tunnel experiment.

CFD Simulation of Two-phase Flow in a Downhole Venturi Meter Feng Ding1, Huang Si2, a, Guan Yuhui2and Ma Weiguo1 1 School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China 2 School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China a huangsi@scut.edu.cn Keywords: Venturi meter; two-phase flow; numerical simulation; CFD Abstract.
This work performs an oil-water two-phase flow simulation in a downhole Venturi meter to investigate the flow field and pressure characteristics with different flow and oil-water ratios.
Recently CFD technology has become an important engineering tool, so this paper uses CFX software to simulate the three-dimensional multiphase flow in Venturi meter, and provides the theoretical basis for Venturi meter’s operation and optimal design.
Some features and natures of the oil-water two-phase flow are found based on the simulation, such as phase stratification, potential cavitaion, higher pressure drop corresponding higher viscous fluids and so on.

Therefore there is a widely industrial interest for the CFD (computational fluid dynamics) simulation of immiscible fluid.
The key to CFD simulation of immiscible flow is to track the free interface of the fluids.
Then the potential in CFD simulation of bubble aggregation and breakage was investigated by open source CFD platform OpenFOAM [5].
However, it is only the shape region in Fig. 2 and first-order upwind scheme (UDS) that can guarantee that CFD simulation is bound.
In most industrial CFD simulation, the PBM (population balance model) coupling Euler-Euler model is widely employed.