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Computer simulation has been employed to understand the thermal-flow and combustion phenomena in the burner element to solve operation problems and in search for optimal solutions.
A CFD analysis provides fluid velocity, pressure, temperature, and species concentrations throughout the solution domain.
CFD can also provide detailed parametric studies that can significantly reduce the amount of experimentation necessary to identify problems and to optimize the operating conditions.
Therefore, it is possible to increase the accuracy of the simulations with a minimum number of additional grid points.
The final unstructured grid having 60,432 nodes and 256,084 elements was used in the simulation.

So the theoretical base is established of the full process of ECM simulation.
Much attention is focused all the way on the research of ECM simulation whatever in domestic or abroad[2,3,4].
It is the base of ECM simulation to set up actual mathematical-physical models of ECM.
The detailed solution of mathematic model can be got by using CFD from ANSYS[7,8,9].
Computer Simulation System for Electrochemical Shaping.

Therefore, many researchers have used computational fluid dynamics (CFD) software to solve problems which can not be solved theoretically and experimentally.
The simulation for the flow velocity field inside and outside the abrasive water jet nozzle has been carried out [2,3].
The simulation model is divided with the hexahedron cell, one of the model is shown in Fig.1.
The k-ξ turbulence model, and the item realizable and non-equilibrium wall functions were used in simulation.
Simulation Result and Analysis The simulation result of Fig. 2 is the velocity field of the three phase flow in the X-Z plane.

In view of all above, CFD analysis had been performed in the work to investigate the aerodynamics of high speed container flat wagon. 2.
CFD numerical analysis 2.1 Governing equations and method Simulations were performed considering the flow as steady, isothermal, uncompressible and using a segregated solver.
It integrates the advantage of k-model in the near wall simulation and k - model in external area calculation [4].
The Application of SST Turbulence Model in the Aerodynamic Simulation of the Automobile.
Large-eddy simulation of the flow around a freight wagon subjected to a crosswind.

Numerical Simulation of Mold Filling and Solidification Process for Beam Blank Continuous Casting Yanjuan Jin1, a, Xiaochao Cui1, b and Zhu Zhang1, c 1School of Applied Science, Taiyuan University of Science and Technology, Waliu Road 66, China 030024 ajinyanjuan2003@163.com, bcuixiaochao@sohu.com, czhangzhu030168@163.com Keywords: Beam blank continuous casting, Mold filling, Solidification, Velocity field, Temperature field, Numerical simulation Abstract.
Mold filling and solidification of molten steel for 750mm×450mm×300mm continuous casting mold of single SEN and double SEN are simulated by using CFD commercial code Flow-3d.
Lou[2], 3-D numerical simulation on flowing distribution in mould for beam blank continuous casting of J.W.
YANG[3], 3-D numerical simulation on flow of molten steel in mould during beam blank continuous casting of Y.P.
Numerical Simulation Assumed Conditions.

Likewise, several commercial CFD codes ,like FLUENT, CFX, CHEMKIN etc., have been developed for combustion simulation.
(28) 5-Simulation of premixed flame by FDS: The FDS-5 (Fire Dynamics Simulator) code, developed by the American Institute NIST is a CFD model of three-dimensional numerical simulation.
This tool along with Smokeview software which helps to visualize simulation results is freely available on the website of NIST.
This allows us to validate our numerical method and use FDS code for simulation of premixed flames.
Zou,  « Numerical simulation of pressure changes in closed chamber fires” , Building and Environment 44 (2009) 1261–1275

LTD., Qiqihar Heilongjiang Province, China ahustyuxiaodong@163.com, cxiawa-1972@163.com Keywords: Constant flow, Hydrostatic center frame, Pressure field, Simulation research Abstract.
In order to solve the force deformation of the hydrostatic center frame in the heavy type horizontal lathe, a simulation research concerning pressure field of hydrostatic center frame was described.
The simulation results indicate that an improved characteristic will be affected by rotating velocity easily, and oil cavity pressure creases by gradually with rotating velocity enhancing.
Numerical simulation Grid partition.
Three-dimensional geometry model of the oil film is produced by software UG, then the model is introduced into the pre-processor ICEM CFD to generate grid.

On the contrary, it is convenient to accurately calculate and simulate the flow field under complex geographical and operational conditions using computational fluid dynamics (CFD) method; thus, CFD is an important and useful tool for investigating this kind of water environment problem.
Numerical Simulation Methods Model of calculated region.
The water body was simplified as a two-dimensional axisymmetrical simulation model of flow domain, and the right half of the simulation model was taken into consideration.
The temperature of water-inlet of simulated region defined by an UDF is the average value of temperature of water-outlet of simulation region at the previous simulation time.
Axis was set at the left boundary of the simulation region.

Numerical simulation and laboratory experiments was used to research the distribution law of tunnel fire at home and abroad due to the complexity of tunnel fire mechanism.
In English, Cox used CFD to analyze the tunnel fire problem early, ventilation, slope and unstable fire were simulated through establishing the mathematical model of JASM, which simulation results were consistent with experimental results of Zwenberg model [3]; In Japan, M.Dobashi and T.Imai studied vertical and horizontal emergency ventilation systems in the event of a tunnel fire through numerical simulation, and it applied to the tunnel of Higashiyama, in addition, the smoke density varying with time and space was also analyzed [4]; In France, B.Brousse and C.Moret attempted to investigate the smoke spread of different tunnel fire through a three dimensional transient simulation, and it considered the tunnel wall roughness, partial loss of inward and outward and the train piston effect [5]; In America, S.S.Levy and J.
Sandzimier pointed out the relations between the exhaust air rate and smoke control effect, and CFD program combined with Ted Williams tunnel was used to the model of fire [6]; In China, the research on numerical simulation of the tunnel fire started late, Lian Feng employed the method of three dimensional numeric simulation to analyze the fire in certain tunnel and the velocity field and temperature field.
RABT curve and HC curve can better simulate the variation of temperature in the tunnel according to full-scale simulation experiment results of UPTUN.
Mizuno, Numerical simulation of the emergency tunnel ventilation for a tunnel with longitudinal and transverse systems combined, 10th International Symposium on the Aerodynamics & Ventilation of Vehicle Tunnels (2000) [5] B Brousse and C Moret, ID-computer simulations and field fire testing using a chimney limited longitudinal smoke control system, 10th AVVT (2000) [6] S.S.Levy and J.R.Sandzimier, Smoke contral for the Ted Williams Tunnel-a comparative of extraction rate, 10th International Symposium on the Aerodynamics & Ventilation of Vehicle Tunnels (2000) [7] Lian Feng, Wandi Wang, Qixin Yang and Mingnian Wang, J.

The finite element analysis and numerical simulation Finite element model.
Grid is an important step for the finite element analysis, on the numerical simulation precision has a great influence.
Fig.3 Grid division Simulation analysis.
High Order Schemes for CFD:A Review[J].
Critical Issues in the Simulation of HotForming Operations[J].