Does FreeFEM support meshes with hanging nodes?

General Discussion
1

Hi,

I have created a nonconforming mesh( with hanging node) in .msh format using Matlab. I need to solve the Laplace equation with homogeneous Dirichlet boundary conditions using CG/DG method. I can import this mesh into Freefem. I used the usual weak formulation of the Laplace equation, but Freefem does not compute the exact solution.

My question is, does FreeFEM++ solves any PDE on meshes with hanging nodes? If yes, how to treat these hanging nodes?

Thank you.
Best regards,
Pratik

Summary

This text will be hidden

2

mesh
mesh1345×441 67.8 KB

3

No, FreeFEM does not support meshes with hanging nodes.

4

It wouldn’t be too hard to make your mesh valid though, all you would have to do is divide the larger rectangles into five elements instead of four.