[bibiboom]

Dear all,

I would like to mesh using GMSH this geometry (a cube in a cube):

C=10;
F=10;
Block(1) = {-C/2, -C/2, -C/2, C, C, C};
Block(2) = {-F*C/2, -F*C/2, -F*C/2, F*C, F*C, F*C};
BooleanDifference{ Volume{2}; Delete; }{ Volume{1}; }

I would like Volume 1 (small cube) to have a structured brick mesh (50x50x50 elements for example) and volume 2 (the rest of the big cube) to be filled with a coarse unstructured mesh (making a gradient from the small cube to the edges of the big cube)(the element type doesn't matter, but I guess it should be Hexa mesh). I have been able to realize that kind of mesh using ANSYS APDL, but it generates pyramidal elements that don't exist in ABAQUS (which is the solver I use). That's why I'm trying with GMSH to see if there is another way to mesh this.

I already found how to mesh the inside cube (https://github.com/lordvon/OpenFOAM_...asic2/main.geo) but I don,t know how to mesh the rest.

Here is an example of what I would like to get (obtained with ANSYS APDL):


Thanks in advance for your help!
Regards,
Rémy