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Simulation results show that clearance’s influence on internal leakage is greater than rotation rate, at the clearance of 0.05mm～0.10mm is relatively suitable. 1.
Oil film mesh and numerical simulation   Seven different clearance oil film are created with Pro/E and step format models are imported into Gambit.
Application of CFD analysis for rotating machinery-Part I: hydrodynamic, hydrostatic bearings and squeeze film damper [J].
CFD analysis of journal bearing hydro-dynamic lubrication by Bingham lubricant [J].Tribology International, 2008(41):1190-1204
[4] J.J.Wang, P.F.Zhang, L.X Huang, Numerical simulation of flow around cylinder with an upstream rod in tandem at low Reynolds numbers[J].

Introduction The use of computational fluid dynamics (CFD) for flow through porous media is a realistic and feasible alternative to the experimental approach, due to the opacity of most materials [1].
There are examples of DNS simulations of flow through porous media (e.g., [2]-[9]).
Typically, relatively simple geometries are studied with two different numerical approaches: Lattice-Boltzmann methods or conventional CFD methods using boundary fitted grids.
The simulation of the flow through a staggered array of square cylinders was also performed.
Mohd-Yusof: Combined Immersed Boundaries/B-Splines Methods for Simulations of Flows in Complex Geometries (CTR Annual Research Briefs 1997)

Because simulation can optimize internal structure and reduce cost, several groups made meaningful simulations [1-9].
The simulation is done in 3D domain with finite-element method.
The effect of HVPE reactor geometry on GaN growth rate -experiments versus simulations.
Pastuszka et al., “CFD and reaction computational analysis of growth of GaN by HVPE method,” Journal of Crystal Growth, vol. 296, Sep. 2006, pp. 31-42, doi:10.1016/j.jcrysgro.2006.08.008
CFD simulation on HVPE growth GaN.

At present, most of scholars used CFD to do a numerical simulation research about flow characteristics to provide a theoretical guidance of improving the flow coefficient and reducing the valve flow resistance.
Liu Jian made a 3D numerical simulation research of different opening degree used FLUENT software to improve the structure of the valve and reduce the flow resistance coefficient [2].
He Qingzhong utilized CFX software to make the numerical simulation on large caliber three eccentric master valve to conduct vortex resonance [6].
Li, Numerical Simulation and Analysis on 3D Flow in Large-diameter Butterfly Valve, J.
Liu, et al, Research and Optimization of Flow Characteristics of Tri-Eccentric Butterfly Valve Based on CFD, J.

Abstract.Numerical simulations of flows over two-dimensional vertical axis tidal turbines are carried out.
According to these references, it can be found that various numerical methods have been used to predict power output of a tidal turbine including discrete vortex, single or multiple streamtubes, vortex panel methods and as well as Navier-Stokes equations based CFD.
These aims are achieved by means of numerical simulations using commercial software ANSYS CFX11.
Prior to rotating flows, simulations of flow around the NACA0018 foil at some fixed angles of attack are carried out to ensure that CFD results are reliable.
Due to complexity for rotating cases, flows around a stationary foil(Case 1) under different a are studies first to ensure CFD’s reliability before going to tidal turbines.

R. of China aliutangzhi@yahoo.com.cn,b391873717@qq.com Keywords:Traffic safety; Tire tread groove depth; Hydraplaning; CFD Approach Abstract.Hydroplaning ranks a maior inducement of wet-weather road accidents.
By way of CFD (Computational Fluid Dynamics) approach, this paper frames a finite-element meta-models for rib tires ranging in groove depth, aiming to figure out the wheel water pressures on tires under different traveling conditions, and to find out water velocities of the different parts of the tire tread.
This paper makes an innovation in research methodology, to frame a 3-dimensional finite metamodel of rib tires ranging in groove depths, and then to work out the theoretical values, by way of CFD approach, of hydradynamic pressure in case of different traveling velocitys, thus to work out the risk level of hydraplaning under different traveling conditions.
Turbulences are highly difficult to trace, thus a comprehensive evaluation must be made of the simulation accuracy and the systematic resources required for computation, and then to select proper simulation model.
ADAMS Simulation on the Phenomenon of Water Slippery[J].

Several modifications on computational fluid dynamics (CFD) have been made to increase the number of unknown variables.
The rate of recovery of oil and the displacement of oil with displacing fluid are the core issues for the evaluation and simulation of oil reservoirs [22].
Table 1 shows the input parameters and boundary conditions for the simulation of the displacement of oil with brine.
A numerical pore scale simulation was carried out which was limited to two-dimensional flow for reservoir and oil system for recovery process.
Saidi, "Simulation of naturally fractured reservoirs," in SPE Reservoir Simulation Symposium, 1983: Society of Petroleum Engineers

Numerical Simulation of Gasoline Blending with Two Different Mixing Systems Songying Chena, Fuchao Xieb and Junjie Maoc School of Mechanical Engineering, Shandong University, Jinan, Shandong, 250061, P.
China achensy66@sdu.edu.cn, bxiefuchao2004@163.com.cn, ctfyt_123@163.com.cn Keywords: Mixing Model, Gasoline Blending, Numerical Simulation.
In the field of Computational Fluid Dynamics (CFD), Jayanti (2001) [4] and Patwardhan (2002) [5] all emphasized the significance of reducing the zones of low velocity in mixing tanks by adjusting the flow patterns in order to obtain the shortest mixing time.
Rahimi et.al investigated the effect of jet position on the acid dispersion in a neutralization process by experimental and CFD study, and got the conclusion that the neutralization performance can significantly be affected by the jet position [6].
The flow and turbulent equations were solved by steady flow simulation, while unsteady solver was used for volume fraction equation after convergence in velocity field.

Numercial Simulation on Three-Dimensional Unsteady Flow in a Supercharged Boiler Gas Turbine G Su, G Y ZHOU, F Du Ship and Power College, Naval University of Engineering, Wuhan 430033, Hubei Keywords: Supercharged Boiler, Unsteady Flow, Numercial Simulation.
In this paper, the CFD software Fluent is adopted to simulate the three-dimensional turbulent flow through the cascade of the gas turbine which used in the turbo-charger set of marine supercharged boiler. 2.
Fig.1 The schematic of the gas turbine cascades Fig.2 The computing model When making the numerical simulation to gas turbine internal flow field, provided that Whole loops blade channels were brought into the computational domain, the simulation of interference effect can be achieved most truly.
Conclusion In this paper, the three dimensional unsteady flow inside gas turbine is simulated based on sliding mesh model model, to analyze its CFD.
[2] S T Wang,Simulation of 3D unstesdy stator/rotor interaction[J].J.University of Shanghai for Science and Technology,Shanghai,2001.23(3): 213-216

This does lead to some loss in yarn volume, which may affect the accuracy of (for example) Computational Fluid Dynamics (CFD) simulations to predict fabric permeability.
For example, a voxel mesh approach has been taken for flow simulation of 3D textile fabrics using Ansys CFX CFD software [6].
Modelling Simulation Mater Sci Eng (2008); 16 035010 (16pp)
Modelling Simulation Mater Sci Eng (2009); 17 015008 (16pp)
Clifford: CFD flow simulation for impregnation of 3D woven reinforcements, Proceedings of the 10th International Conference on Textile Composites (TexComp 10), Lille, October 2010