We used the hybrid discontinuous Galerkin method to solve the Stokes - Darcy problem and the code in the attachment is mainly from FGS. Why can I calculate the L2 error of speed well, but not the L2 error of pressure well? Does anyone know what’s wrong ?
https://ngsolve.org/media/kunena/attachments/1430/general-SD-HDG.py
Attachment: general-SD-HDG.py