very fragile mesh motion on SnappyHexMesh generated mesh -- CFD Online Discussion Forums

April 14, 2012, 14:51	very fragile mesh motion on SnappyHexMesh generated mesh	#1
matteoL Member matteo lombardi Join Date: Apr 2009 Posts: 67 Rep Power: 17	Hello, i am trying to simulate the motion of a boat under the hydrodynamic forces, at the moment just sink & trim DoF, using a mesh generated by SnappyHexMesh (no prism layers). As motion solver I am using laplaceFaceDecomposition with quadratic inverse distance motion diffusivity. After a very small motion (less than 1 degree rotation and small sink), the mesh becomes invalid. I have some negative volume cells, inverse pyramids, etc etc... Is it my fault somehow, or are the SHM meshes too "fragile" to be moved by laplace-based motion solvers? What is your experience with moving SHM meshes ? Thanks, matteo

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