|May 5, 2009, 14:17||
MapFields to New Grid For Extreme Grid Deformations due to Body Motion
Join Date: Mar 2009
Posts: 52Rep Power: 10
As you may know extreme mesh deformations due to body motions can result with very bad quality grids. So either one ends up with a simulation blow up or very small time steps to fulfill the CFL condition.
I have been thinking of and testing an approach that involves the following steps:
How about alternative approaches?:
Star CCM+ utilizes the over-set grid approach in which the interpolation between body-attached and stationary grids is performed at each time step. OpenFOAM does not yet have this capability forcing me to work with what we already have.
I know sliding meshes might be an alternative, but I doubt it will work for non-academic cases, that involve not so ideal convex assemblies - ie a boat with a tall mast. One would accommodate the assembly in huge (relative to boat size) spheres which slide to take care of 3DOF rotation part. I think the cost for interpolation face search would be very high in these cases...
Comments are appreciated.
Last edited by albcem; May 5, 2009 at 14:45.
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