How to generate 3D mesh with mesh size decreasing from inner to boundary
I am a new GMSH user and find it very helpful in my research area. I want to know how to generate the 3D mesh with the mesh size decreasing from inner to boundary. For example, I am doing the cone model, I want the big element size in the inner and the smaller size on boundary. So how to do the mesh that can be gradually decrease from inner part to the boundary?