Comsol gmres does not converge. . BiCGSTAB converge with AMG. Am I misunderstanding wha...

Comsol gmres does not converge. . BiCGSTAB converge with AMG. Am I misunderstanding what convergence means in terms of the GMRES algorithm, or is there something else I'm missing in my implementation? Or is this really a result of imprecise arithmetic and extra iterations of the GMRES algorithm just happen to improve to solution? Feb 6, 2015 · Why doesn't iterative solver converge in COMSOL? I have a multiphysics problem in COMSOL involving the laplace equation, navier stokes equations and heat transfer. The COMSOL discussion forum covers a wide variety of simulation topics. Is the non-textbook problem singular? GMRES is guaranteed to converge in at most n n iterations if a solution exists. A larger restart value increases the robustness of the interactive procedure, but it also increases memory use and computational time. Browse the threads and share your ideas with the COMSOL community. , m ~ 64) are done. These equations may be a set of independent ordinary differential equations (ODEs) or a set of coupled equations which arise as a consequence of the spatial discretizatio The convergence behavior of BiCGStab is often more irregular than that of GMRES. I'm assuming this could be due to the coarse-grid correction being "exact". jue fnrtpc qpyqxkr jpzm bljbkuf zoa ugslk kmuzrfi uyylxnu wjnnm