-ts_error_if_step_fails 0 You might want to find out why the nonlinear solver does not converge first. If you have a hand-written Jacobian, you can validate it with -snes_test_jacobian 1 (for a small test case).
Hong (Mr.) > On Apr 28, 2020, at 8:21 AM, Yingjie Wu <[email protected]> wrote: > > Dear PETSc developers > Hi, > > I have recently used TS to solve nonlinear equations with time terms. since > the convergence of my model is not very good, i would like to set to > iterative fixed nonlinear steps per time step. If the problem does not meet > the SNES convergence criteria after fixed number of nonlinear steps , then go > to the next time step calculation. I tried -snes_max_it , but didn't achieve > the effect I wanted, and the program stopped after iterating the fixed number > of steps. How should I set up in the program? > > Thanks, > Yingjie
