|May 5, 2009, 14:17||
MapFields to New Grid For Extreme Grid Deformations due to Body Motion
Join Date: Mar 2009
Posts: 52Rep Power: 9
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.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Dynamic Mesh Problem.||Tom Clark||FLUENT||9||July 7, 2010 07:56|
|virtual geometry||richard||FLUENT||4||January 7, 2009 06:16|
|Hex-Tet Mesh Merge in ICEM||Tristan||CFX||1||September 26, 2008 05:40|
|Mesh||Mignard||FLUENT||2||March 22, 2000 06:12|
|unstructured vs. structured grids||Frank Muldoon||Main CFD Forum||1||January 5, 1999 11:09|