Non-Postive volume

Joel

Hello dears,

I am solving dynamic mesh problem, the problem is that after a few time steps flunet gives me an error massage saying that there are non-postive cell volume in my mesh, When I preview the mesh motion I notice where the problem occuer - the cells that are near to the rigid body become smaller and smaller until they lose their volume completly, how can I solve this problem ? it seems that the smoothing/layering/remeshing function do not function at all.

Thanks in advance, Joel.