Until now, I have used Comsol 3.5a for modelling highly non-linear, time-dependent superconductor problems. The solver I used for this was UMFPACK, which performed best out of all the available options in that version of Comsol. I have now upgraded to Comsol 4.3 and this solver seems to have disappeared.
Does anyone have any advice as to the best solver for this type of problem? And what might be the most suitable substitute for the UMFPACK solver that worked so well previously? I am using the General Form PDE in the Multiphysics module to solve the model, for which the superconductor's electromagnetic properties are modelled using a highly non-linear E-J power law.
Does anyone have any advice as to the best solver for this type of problem? And what might be the most suitable substitute for the UMFPACK solver that worked so well previously? I am using the General Form PDE in the Multiphysics module to solve the model, for which the superconductor's electromagnetic properties are modelled using a highly non-linear E-J power law.