Hello,
I am trying to solve a 3D Model using the MEF physics in the frequency Domain.
With a rather coarse mesh I am able to solve the model (DoF~1e6) with the direct solver (PARDISO) and the global results (resistive losses) are what I expect.
Now when I try to solve the same model with an iterative solver instead, the results vary very much from what I expect (factor~1e16) and the field distribution is totally wrong.
I already tried to lower the relative tolerance to 1e-6 and also tried different iterative solvers with and without preconditioning. But it didn't really help.
The reason I want to use a iterative solver is because I need to refine the mesh and the RAM on my PC is limited to 96GB. The direct solvers become very slow as soon as the RAM is fully used.
Do you guys have some tips/help ?
I am trying to solve a 3D Model using the MEF physics in the frequency Domain.
With a rather coarse mesh I am able to solve the model (DoF~1e6) with the direct solver (PARDISO) and the global results (resistive losses) are what I expect.
Now when I try to solve the same model with an iterative solver instead, the results vary very much from what I expect (factor~1e16) and the field distribution is totally wrong.
I already tried to lower the relative tolerance to 1e-6 and also tried different iterative solvers with and without preconditioning. But it didn't really help.
The reason I want to use a iterative solver is because I need to refine the mesh and the RAM on my PC is limited to 96GB. The direct solvers become very slow as soon as the RAM is fully used.
Do you guys have some tips/help ?