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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

By using the commercial CFD code, FLUENT, the analysis of a heat and mass transfer phenomena was done.
In this simulation, the source gas is assumed as the silane (SiH4) and the carrier gas is assumed as H2.
Theoretical Analysis The geometry for numerical simulation is shown in Fig.1.
The numerical simulations are carried out for 5, 8 and 12inch deposition surface.
Grid system for numerical simulation Fig. 2.

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.

Then the flow field was calculated by using Large Eddy Simulation in the CFD software.
Numerical Simulation Analysis FW-H acoustic analogy method simulation analysis.
The simulation model was built according to the open test environment.
Then the flow field was calculated by using Large Eddy Simulation in the CFD software.
And results of simulation and test results were compared and analyzed

Fig.1.The sketch of geometric model The compressible Reynolds-averaged Navier Stokes with one equation S-A turbulence model is solved by Computational Fluid Dynamics (CFD) method.
The comparison of CFD result and the experimental data at Ma=0.73, Re=6.5e+6 and α=3deg. is shown in Fig. 3.
It is found there is a good agreement between CFD simulation and experiments.

This paper presents results obtained from the application of a computational fluid dynamics (CFD) code Fluent 6.3 to modeling of elevated pressure methane non-premixed sooting flames.
In this paper, the results of the application of a computational fluid dynamics (CFD) code Fluent 6.3 to modeling of elevated pressure methane non-premixed sooting flames are presented.
All the above calculations were simultaneously performed using commercial CFD software FLUENT ver. 6.3 which functions as the processor as well as post processor.
The solid line represents the simulations resulting from the use of Tesner’s model, and the dashed line the simulations resulted from employing Khan and Greeves’ model.
Conclusions A numerical simulation of soot formation and destruction has been adopted to study the performance of two soot models for prediction of soot levels in turbulent non-premixed flames.

Finally, the strength of the train under different working conditions is verified, weakness is pointed out and suggestions based on the simulation test are given.
In above model, the factor and f could be got from CFD simulation or actual measurement.
In actual test and CFD simulation, it's known that the load frequency is lower than 10Hz, this means the weak that train body can not bear high frequency load would not appear in practice.
Conclusion By the research of aerodynamic conditions, air tightness model and train body structure FEM model are built and used into simulation.
The method is feasible, and the simulation and comparison of various loads have been finished.

Advanced computational dynamic (CFD) modeling has recently become one of the most important tools used for the designed and performance optimization of a MOCVD vertical closed-spaced reactor.
The hydrodynamic of vertical rotation-disk reactors has also been the subject of numerously numerical simulation works [3-5].
Simulation Results & Discussion The Effect Of Chamber Pressure The effect of varying the operational pressure is investigated.
Brown, Hydrodynamic Dispersion in Rotation-Disk OMVPE Reactor: Numerical simulation and Experimental measurements, J.
Quinn, Process conditions optimization for the maximum deposition rate and uniformity in vertical rotating disc MOCVD reactors based on CFD modeling, Journal of Crystal Growth. 303 (2007) 323-329.

Using ANSYS-FLOTRAN CFD program, the stream field and the temperature field caused by the point heat source, when the two-dimensional enclosure is inclined, has been obtained by a series of procedure, such as model building, meshing, loads applying and equation solving.
Finite Element Method ANSYS software FLOTRAN CFD analysis function is used to analyze two-dimensional and three-dimensional fluid flow tool that can solve the problem of natural convection [5].
Fig.6 Relative curve of the Bridge’s voltage and the tilt angle Fig.5 Structure of sensing element Conclusions Finite element method, using ANSYS-FLOTRAN CFD software to calculate the convection field and temperature filed which caused by point heat source in the two-dimensional sealed cavity in different inclined.
[5] Guoqiang Wang, Practical engineering simulation technology in the practice of ANSYS [M], Xian, Northwestern Polytechnical University Press, 1999, pp. 22.

Using ANSYS-FLOTRAN CFD program, the stream field and the temperature field caused by the point heat source, when the two-dimensional enclosure is inclined, has been obtained by a series of procedure, such as model building, meshing, loads applying and equation solving.
(5) Finite Element Method ANSYS software FLOTRAN CFD analysis function is used to analyze two-dimensional and three-dimensional fluid flow tool that can solve the problem of natural convection [5]
Fig.5 Structure of Sensing Element Fig.6 Relative curve of the Bridge’s voltage and the tilt angle Conclusions Finite element method, using ANSYS-FLOTRAN CFD software to calculate the convection field and temperature filed which caused by point heat source in the two-dimensional sealed cavity in different inclined.
[5] Guoqiang Wang, Practical engineering simulation technology in the practice of ANSYS.( Northwestern Polytechnical University Xi’an,Press, 1999), p. 221.