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According to this design scheme, numerical simulation of centrifugal pump (ns48) as turbine has been done.
The impact of long blade and short blade on the performance of the turbine was analyzed by numerical simulation and experimental method in reference [6].
Tab.2 Orthogonal design schemes Scheme number Combination of factors Scheme number Combination of factors Scheme number Combination of factors (1) 1-1-1-1 (5) 2-2-3-1 (9) 3-3-2-1 (2) 1-2-2-2 (6) 2-3-1-2 (10) 4-0-0-0 (3) 1-3-3-3 (7) 3-1-3-1 (11) 5-0-0-0 (4) 2-1-2-3 (8) 3-2-1-3 (12) 6-0-0-0 Numerical Simulation Conditions and Method Computational Domain Selection and Meshing The Pro/E software was used to build entity model and the ICEM-CFD was used to generate unstructured tetra/mixed grid for each component part.
Control Equations and Turbulence Model For the simulation, the ideal water at 20℃was selected as the working medium.
The torque (M) and total pressure of inlet and outlet (Pin, Pout) were reported from the FLUENT, when simulation convergence.

This study applied CFD software to analyze the effect of variations of gap thickness and rotating speed on the pressure in the gaps of the bearings and the stiffness of the spindle.
Analytical Approach Based on the finite volume method, this study utilized the laminar flow module of the CFD software, FLUENT, to solve the three dimensional Navier-Stokes equations to compute the pressure of air flow in the bearing gaps and the housing gaps in an aerostatic spindle.
To simplify the simulation, the following assumptions were made for the flow field: (1).
Simulation models To reduce the size of the mesh, only the front portion of the aerostatic spindle module, as shown in Fig. 1, was considered in building the models for analysis.
Rao: Simulation based on FLUENT and experimental research of porous aerostatic bearing, Master Thesis, Harbin Institute of Technology, China (2006) [3] J.M.

The FLUENT analytic software for fluid is used to do the numerical simulation.
Comparing the simulation result with the theoretical analysis and header’s actual water situation, verify the correctness of the simulation result, study water convexity of different boundary condition, and analyze the water uniformity in different parts of the header.
Fig. 2 and Fig. 3 give the header real object and FLUENT simulation model.
Fluidity simulation and analysis when both sides of water is larger.
The analysis of computational fluid dynamics— CFD software principles and applications, first ed., Tsinghua University Press, Beijing, 2004

In such cases both cost and time can be reduced by adopting numerical simulations.
Recently Fabio Ferraro et al [14] have done parametric study of shock wave simulations using COMSOL multiphysics.
The simulation results are also compared with the experimental results.
The commercial CFD package ANSYS-FLUENT is used to model the shock tube.
The Von-Mises strain and mid-point deformation from simulations closely agree with experimental values.

Numerical Simulation of Cavitation Flow Field in a Francis Turbine Runner with Attached Blades ZHANG Siqing1, a, MA Guohua2, b , QIAN Jing3,c 1,3 Faculty Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China 2 Yunnan Electric Power Technology Co., LTD, Kunming, 650093, China a 363685119@qq.com, b 914234394@qq.com, c qj0117@163.com Keywords：Francis turbine; cavitation; two-phase fluid; numerical simulation; water-vapor volume fraction Abstract.
The numerical simulation of cavitation flow field in a Francis turbine runner with attached blades was conducted based on the no-slip mixture model in the Euler approach and the Singhal cavitation model.
Numerical simulation method of cavitating flows Research object and numerical approach.
Practice has proved that, RNG turbulence model has a more satisfactory results in the CFD calculations of cavitation flow field.
Since cavitation usually occurs in non-design conditions, the simulation of cavitation flow field was conducted aimed at small flow condition and large flow condition in the main operating range.

In Ansys CFX®, the aspect ratio is one of the most important simulation criteria, influencing numerical convergence.
The numerical mesh generated for the simulation was directly influenced by the relationship between the mold thickness and the ribbon thickness, where the pre-established quality criterion, aspect ratio, was a determining factor for the convergence of the simulation.
Wang, Simulation and analysis of shape memory alloy fiber reinforced composite based on cohesive zone model, Mater.
Giordano, Finite element simulation of low velocity impact on shape memory alloy composite plates, Compos.
Oliveira, Applying CFD in manufacturing of polymer composite reinforced with shape memory alloy via Resin Transfer Molding, Inter.

Accounting of both the nozzle and front-box fields will yield more accurate simulation results.
Simulation conditions for Finite Element Analysis Mesh Type.
Results of fluid flow simulations Post-processing by ANSYS.
[5] Huey-Jiuan Lin: Modelling and Simulation in Materials Science and Engineering, vol. 12 (2004), p. 255-72
[7] Nastac, L., Li, B.Q.: Multiphase Phenomena and CFD Modeling and Simulation in Materials Processes Symposium[C] (2004). p. 325-34

Numerical simulation Modeling Construction.
Since there is no a flow boiling model embedded in CFD software, a program based on C-language was constructed to realize effective control on the inter-phase mass transfer and physical parameters of temperature dependent variation, and so on which involve in the boiling process.
The impact of gravity on bubble length is negligible under this numerical simulation conditions, see figure.4.
Numerical simulation of growth of a vapor bubble during flow boiling of water in a microchannel[J].
Confined bubble growth during flow boiling in a mini-/micro-channel of rectangular cross-section part II: Approximate 3-D numerical simulation[J].

Two-phase flow simulations can be performed on these 3D images using various simulation software [15, 16].
Meshed structure of the porous medium and boundary conditions for simulations [20].
So, by using this simulation the oil recovery can also be predicted using different nanofluids and brine.
Conclusion Direct simulations of two-phase flow simulations using micro-CT scan images of sandstone with primary crude oil saturation followed by brine and ZnO nanofluid injection have been studied.
Scientiarum, "A simulation model for two-phase flow in porous media," University of Oslo, Department of Physics, 1996

The commercial CFD code FLUENT is used to model the plasma and the solid anode part.
Hsu first used MHD and hydrodynamic equations successfully numerical simulation of free-burning argon arc，and verified the accuracy of the simulation results through experiment [1].
For numerical simulation and industrial application there are still very important indicators.
Numerical simulation of heat transfer and flow of the free burning arc[J].
Plasma Process. 19153-70 [12] Zhao G Y, Dassanayabe M and Etemadi K 1990 Numerical simulation of a free-burning argon arc with copper evaporation from the anode plasma chem.