Create mesh with topography
Hi,
I am trying to generate a mesh with topography. Below, I present a sample.stl file with 18 elements. I want to extend the geometry in the negative z-direction and fill it with tetrahedral elements. I could not figure out how to do that. I tried to define the projection of four corner points in the -ve z direction. After that, I do not know how to define surface and volume. Any suggestion would be helpful.
I am using Gmsh GUI version 4.4.1 on Ubuntu 20.04.
Thanks in advance for your reply. Deepak Garg