If possible please send the current picture of the mesh after motion and the various parameters which you have used.

Dear Julie,

I suggest to use hybrid mesh instead of auto meshing because hybrid mesh approach will give more control on the creating nodes in the critical regions where different surface parts are joining. Besides, you should also take care of exact tolerance gap between the mating surfaces.

Dear Shrish, 

Thank you very much for your answer. Just how do you settle a hybrid mesh ? 

And I don't know what to settle as a tolerance gap between the surfaces ... 

Hybrid mesh i.e. combination of Hex&Tet/Tri mesh. Actually, for the meshing of wall near to mating surfaces the automatic mesh approach is inappropriate because we do not have more control on the nodes in auto-meshing. So to solve this issue we usually set an appropriate tolerance gap between mating surfaces to remove the creating of negative volumes near to the mating surfaces.

If possible please send the current picture of the mesh after motion and the various parameters which you have used.

Hi Julie Raitiere

In the automated mesh, you can use curve control from custom controls to sharping edges. Also if in the surface mesh has errors you can define surface control. If star ccm fill gaps that you need them, you need to decrease fill gape value from prism layer mesher.

How you solve self-intersections error? I saw this error in some simulation and saw different solutions. I will be glad to hear your solution.

Hope it help.

Best Regards