mesh at the corner: bad quality
 

Hi All,

When I generate the mesh for a square chamber using tetra/prism mesh, I found that the cells at the corners of two walls always have bad quality (as shown in the attached figure). Does anybody know how to improve the quality of the mesh there? Thanks.

Try using smoothing the surface mesh using the Laplace algorithm (set the volume elements to 'Float') several times, then regenerate the volume mesh using the Delaunay method.