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Old   October 30, 2006, 06:25
Default grid deformation technique
CFD Student
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Dear CFD People,

I have my 2D Navier-Stokes solver (structured grids) based on cell-centered finite volume employing central differecing and upwind schemes for the evaluation of convective fluxes and Green-Gauss aproach for evaluation of diffusive fluxes with convergence acceleration techniques such as local time stepping, enthalpy damping, residual smoothing and multigrid.

I am trying to implement ALE method to handle moving grid problems. I want to use algebraic grid generation procedure based on Transfinite Interpolation (TFI) to allow rapid generation of structured moving grids. In this respect, could you please recommend me any articles, papers and reports, which clearly explains grid deformation technique on structured grids? Any help is greatly appreciated.

CFD Student.
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Old   November 2, 2006, 11:30
Default Re: grid deformation technique
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TFI is borderline useless for generation of grids (except for very simple geometries, or as a preprocessor for elliptic grid generation). However, it is useful for grid deformation, and that's what you should consider: Don't use TFI to "generate" the grids, but use it to interpolate specified boundary displacements onto the 3D domain. Then you superimpose these displacements on the steady-state grid. There are many articles you can read on this technique. Try this one:

Wong, A., Tsai, H.,Cai, J., Zhu,Y., and Liu, F., "Unsteady Flow Calculations with a Multiblock Moving Mesh Algorithm," AIAA Paper 2000-1002
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Old   November 4, 2006, 02:37
Default Re: grid deformation technique
CFD Student
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Thanks Mani,

I will follow your suggestion.

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