lid velocity = 200., prandtl # = 1., grashof # = 10000. 0 SNES Function norm 2240.15 1 SNES Function norm 0.590311 2 SNES Function norm 5.84955e-06 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 3455.4 1 SNES Function norm 201221. 2 SNES Function norm 2.47608e+09 Nonlinear solve did not converge due to DIVERGED_DTOL iterations 2 SNES Object: 2 MPI processes type: ngmres Number of stored past updates: 30 Residual selection: gammaA=2e+00, gammaC=2e+00 Difference restart: epsilonB=1e-01, deltaB=9e-01 Restart on F_M residual increase: FALSE maximum iterations=10000, maximum function evaluations=30000 tolerances: relative=1e-08, absolute=1e-50, solution=1e-08 total number of function evaluations=3 norm schedule ALWAYS total number of grid sequence refinements=2 Jacobian is built using a DMDA local Jacobian SNESLineSearch Object: 2 MPI processes type: basic maxlambda=1.000000e+00, minlambda=1.000000e-12 tolerances: relative=1.000000e-08, absolute=1.000000e-15, lambda=1.000000e-08 maximum iterations=1 SNES Object: (npc_) 2 MPI processes type: fas type is MULTIPLICATIVE, levels=2, cycles=1 Not using Galerkin computed coarse grid function evaluation Coarse grid solver -- level 0 ------------------------------- SNES Object: (npc_fas_coarse_) 2 MPI processes type: newtonls maximum iterations=50, maximum function evaluations=10000 tolerances: relative=1e-08, absolute=1e-50, solution=1e-08 total number of linear solver iterations=8 total number of function evaluations=43 norm schedule ALWAYS Jacobian is built using colored finite differences on a DMDA SNESLineSearch Object: (npc_fas_coarse_) 2 MPI processes type: bt interpolation: cubic alpha=1.000000e-04 maxlambda=1.000000e+00, minlambda=1.000000e-12 tolerances: relative=1.000000e-08, absolute=1.000000e-15, lambda=1.000000e-08 maximum iterations=40 KSP Object: (npc_fas_coarse_) 2 MPI processes type: preonly maximum iterations=10000, initial guess is zero tolerances: relative=1e-05, absolute=1e-50, divergence=10000. left preconditioning not checking for convergence PC Object: (npc_fas_coarse_) 2 MPI processes type: bjacobi number of blocks = 2 Local solver information for first block is in the following KSP and PC objects on rank 0: Use -npc_fas_coarse_ksp_view ::ascii_info_detail to display information for all blocks KSP Object: (npc_fas_coarse_sub_) 1 MPI process type: preonly maximum iterations=10000, initial guess is zero tolerances: relative=1e-05, absolute=1e-50, divergence=10000. left preconditioning not checking for convergence PC Object: (npc_fas_coarse_sub_) 1 MPI process type: ilu out-of-place factorization 0 levels of fill tolerance for zero pivot 2.22045e-14 matrix ordering: natural factor fill ratio given 1., needed 1. Factored matrix: Mat Object: (npc_fas_coarse_sub_) 1 MPI process type: seqaij rows=32, cols=32, bs=4 package used to perform factorization: petsc total: nonzeros=448, allocated nonzeros=448 using I-node routines: found 8 nodes, limit used is 5 linear system matrix, which is also used to construct the preconditioner: Mat Object: (npc_fas_coarse_sub_) 1 MPI process type: seqaij rows=32, cols=32, bs=4 total: nonzeros=448, allocated nonzeros=448 total number of mallocs used during MatSetValues calls=0 using I-node routines: found 8 nodes, limit used is 5 linear system matrix, which is also used to construct the preconditioner: Mat Object: 2 MPI processes type: mpiaij rows=64, cols=64, bs=4 total: nonzeros=1024, allocated nonzeros=1024 total number of mallocs used during MatSetValues calls=0 Down solver (pre-smoother) on level 1 ------------------------------- SNES Object: (npc_fas_levels_1_) 2 MPI processes type: nrichardson maximum iterations=1, maximum function evaluations=30000 tolerances: relative=0., absolute=0., solution=0. total number of function evaluations=4 norm schedule FINALONLY Jacobian is built using a DMDA local Jacobian SNESLineSearch Object: (npc_fas_levels_1_) 2 MPI processes type: secant maxlambda=1.000000e+00, minlambda=1.000000e-12 tolerances: relative=1.000000e-08, absolute=1.000000e-15, lambda=1.000000e-08 maximum iterations=1 Up solver (post-smoother) same as down solver (pre-smoother) maximum iterations=1, maximum function evaluations=30000 tolerances: relative=0., absolute=0., solution=0. total number of function evaluations=0 norm schedule FINALONLY Jacobian is built using a DMDA local Jacobian Number of SNES iterations = 2