Solve coupled PDE

[MAS-OUD (Masoud Nazari)]

Hello. How can I input the following problem in FREEFEM?

It is actually a coupled PDE, and the coefficients in the weak form are matrices instead of scalars.

Thanks in advance

[frederichecht (Frédéric Hecht)]

You have no problem to use freefem++ to solve numerical this problem if you have amesh of \mathcal D not to fine.

I takes 1/3 a hours to write a first solution.