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Two-dimensional numerical simulation was conducted by VOF model and CSF model based on the test geometrical model.
Numerical simulation The 2-dimensional unsteady simulation on the flow phenomenon of deposited water displaced by laminar flowing oil in hilly terrain tube shown in Fig. 1 was performed according to the computational fluid dynamics (CFD) theory by FLUENT software which is based on the finite volume method.
A no-slip boundary condition was imposed at the tube wall for all simulations.
To further compare the simulations with the theoretical predictions, the critical condition also is predicted by water plug model [9].
Therefore, the simulations by VOF and CSF model could describe the mechanism of oil-dragging-water system reasonablely.

Fig. 1 Extrusion system The newest approach to study the flow and mixing in these extruders was computational fluid dynamics (CFD) numerical simulation.
Numerical Simulation Geometry of Discs.
The number of marker particles had to be large enough for the simulation.
[5] L.Zhu, K.A.Narh, K.S.Hyun, “Valuation of numerical simulation methods in reactive extrusion,” Adv.
[6] A.Li, B.Jiang, S.H.Xu, “3D flow field simulation in series disc-screw extruder,” Polym.

The numerical simulation of hot forming is implemented [1,9].
The cooling system in the hot forming tool is analyzed with the method of computational fluid dynamics (CFD) [10-11].
Both experimental and simulation methods can be adopted to evaluate the impact resistance of hot forming parts and conduct optimization design.
Commercial software LS-DYNA is employed for the simulation, and the impact velocity is 50km/h.
Fig .6 shows the simulation result of bending force and displacement of the B280/440DP steel bumper (with the thickness of 2.0mm), Fig. 7 to 10 show the simulation results of hot forming high strength steel (HFS) bumper (with thickness from 2.0mm to 1.2mm respectively).

Today, using Computational Fluid Dynamics (CFD) method, more and more studies have been opened on the flow field in precalciners.
The differences between them are little, indicating the rationality and reliability of simulation results.
Conclusion In this paper, numerical simulation was executed for a full-scale precalciner.
Wang in: Numerical simulation study on gas-particles two-phase flow in pre-calciner.
Communications in Nonlinear Science and Numerical Simulation Vol.11 (2006) p440-451 [6] L.

To explore fluid-thermal analysis of the flow fields of front-box and One-spacer nozzle of aluminum roll-casting, a three-dimensional finite element simulation model has been developed to provide analyzing distribution of velocity and temperature of outlet of nozzle, by using coupled fluid-thermal FEM simulation of FLOTRAN module in ANSYS 6.0.
Accounting of both the nozzle and front-box fields will yield more accurate simulation results.
Based on industrial experiments and simulation, one-spacer nozzle has potential capacities to be designed for higher speed and thinner sheet of roll cast.
Multiphase Phenomena and CFD Modeling and Simulation in Materials Processes Symposium. (2004), p. 325-34
[10] Liang Tao: Research on Numerical Simulation of Heat Transfer and Thermal Crowning of Roll Shell during Twin-roll Casting, Ph.D. thesis.

The measurements performed with diagnostics available in the facility, provide the boundary conditions to run numerical simulations and to validate mobilization models .
The authors have also the capability to acquire, elaborate and analyze the images of dust mobilized in the chamber during the pressurization thorough optical techniques and, last but not least, they have the skills to perform numerical simulations of different phenomena.
Gaudio, Safety analysis in large volume vacuum systems like tokamak: Experiments and numerical simulation to analyze vacuum ruptures consequences, Adv.
Richetta, “Large eddy simulation of loss of vacuum accident in STARDUST facility,” Fusion Eng.
Richetta, Loss of vacuum accident (LOVA): Comparison of computational fluid dynamics (CFD) flow velocities against experimental data for the model validation, Fusion Eng.

Numerical Simulation of Low Mach Number Steady and Unsteady Flow Past a Circular Cylinder with Preconditioning Method Ning Caoa, Yaofeng Liub and Shijie Luoc China Academy of Aerospace Aerodynamics, P.O.
Box 7201, 100074 Beijing, China acnbuaa@sina.cn, blyf545@sohu.com, clord.p@163.com Keywords: Numerical simulation; Preconditioning; Steady flow; Unsteady flow Abstract.
Preconditioning techniques have become established as a useful technique for optimizing accuracy and efficiency of CFD solutions over a range of flow conditions.
However, numerical results by using time-dependent method are not satisfied in the simulation of low Mach number flows.

It had not been explored which real-time magnitude can meet the requirement of the simulation object in computer simulation system.
Some key physical components are accessed to computer simulation circuit in HIL simulation system.
The aerodynamic coefficient of the simulation model can be calculated -with the common pneumatic software for estimation and analysis, such as DATCOM, DesignFOIL, Advanced Aircraft Analysis and so on [5]; Or through a commercial CFD numerical simulation software, such as FLUENT, CFX and so on; Or using interpolation algorithm (isometric / no isometric single argument parabolic interpolation, isometric/no isometric double argument parabolic interpolation, etc.) to calculate the datasheet from engineering estimation and the wind tunnel testing.
The simulation control function can manage simulation process.
Journal of System Simulation. 2001(01), p. 60-63.

In recent years, many authors have studied the fouling mechanism and the effect of fouling on gas turbine performance by CFD method or analytical model.
In the simulation of gas turbine performance, the prediction of compressor performance at various conditions is more crucial.
Simulation result analysis In order to demonstrate the validity of stage-stacking method, an 8-stage axial compressor is applied.
Simulation result shows that thermodynamic performance parameters are reduced with increase of operating time.

Modeling In the present work, HyperXtrudeTM, a commercial simulation software module dedicated to extrusion simulation was used.
The solver for this software uses an Arbitrary Lagrangian-Eulerian meshing and is governed by FEM and CFD principles.
Simulations and validation of coefficients of convective heat transfer and friction Simulation of a hollow billet of standard dimensions (119 mm Outer Diameter, 450 mm length) was carried out under the following conditions: (1) OD 119 mm, ram speed 30 mm/s, fillet radius 10 mm, reduction ratios: 6, 8, 10, 12, 14.44, 20
Ram speed of 47 mm/s, h = 100 and µ = 0.9 are the values that are used in further simulations.
This is brought out by the simulation as shown in Fig. 4 (b).