Opencascade Issue subtracting volumes
Dear Christophe About 3 months ago I contact you because I had problems subtracting volumes with opencascade. Then you concluded the root cause was within the opencascade technology. You made a bug tracker Currently I believe I have a similar but different problem. I think the root cause is now within gmsh. In figure 1-3, you can see the problem. I am subtracting a volume from a cube. The subtracted volume is not contained completely within the cube. So also the surface mesh has a discontinity. You can see that the surface mesh on the cube is not good, elements are missing on one surface and the mesh cannot be made periodic. This problem is solved when I refine the element size on the surface of the subtracted volume, see figure 4-5. The number of elements of the two periodic surfaces match again! However due to computational time, I don’t want to refine and as you can see, the required amount of refinement is extremely high. Do you have any idea what can cause this? Can you help me out? See attached for the mesh files. I used the command line gmsh -3 -o test.msh mesh.geo > outputmesh.out to make the mesh,
Best Regards,
Thijs Egelmeers