[priyanshuFSI]

Hi everyone,

I'm new to GMSH and having some trouble with creating a 3D mesh from a surface extrusion.

Here’s the situation: I have a 2D surface with non-uniform element sizes. Near the walls, the elements are much smaller—about 20 times smaller than those further away. When I extrude this surface to create a 3D mesh, I have the option to set the number of layers. From what I understand, the number of layers will control the element size in the third dimension, right?

The problem is, if I choose a number of layers that matches the size of the larger elements (away from the walls), the aspect ratio of the smaller elements (near the walls) gets distorted. But if I adjust for the smaller elements, the larger ones end up being too thin and stretched.

Is there a way in GMSH to control the extrusion size in the third dimension in a way that avoids messing up the aspect ratios? Any suggestions on how to tackle this would be greatly appreciated!.

Thanks in advance