|June 15, 2004, 08:57||
I am working on the unsteady flow around flapping (plunging and rotation) wings using moving meshes. This week I succeeded in using tetrahedral elements in combination with spring-based smooting and local remeshing using the default values given in the Dynamic Mesh tutorial (valve). But in the end I want to use hexahedral elements. I have the following 2 questions:
* After a couple of plunging periods I got a segmentation fault because negative cells occur. How is that possible? Why is the mesh at t=0 not the same at t=T (period)?
* I want to use hexahedral elements. Do I have to use the dynamic layer mesh update method? I tried it without succes. It is not used in the tutorial, so I do not know what a respectable values for the split and collapse factor coefficients?
I hope that someone has encountered typical problems concerning the use of dynamic meshes with Fluent.
Thanks in advance, Frank
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