lid velocity = 0.00591716, prandtl # = 1., grashof # = 1. 0 KSP Residual norm 0.22318 3 KSP Residual norm 0.0397558 6 KSP Residual norm 0.000417387 9 KSP Residual norm 2.72144e-05 12 KSP Residual norm 2.60861e-06 15 KSP Residual norm 1.0556e-07 0 KSP Residual norm 6.21497e-06 3 KSP Residual norm 4.01807e-07 6 KSP Residual norm 3.02758e-08 9 KSP Residual norm 5.54048e-09 12 KSP Residual norm 1.540e-10 15 KSP Residual norm 2.084e-11 SNES Object: 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=30 total number of function evaluations=3 norm schedule ALWAYS Jacobian is built using colored finite differences on a DMDA SNESLineSearch Object: 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: 2 MPI processes type: bcgsl Ell = 3 Delta = 0. maximum iterations=10000, initial guess is zero tolerances: relative=1e-05, absolute=1e-50, divergence=10000. left preconditioning using PRECONDITIONED norm type for convergence test PC Object: 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 -ksp_view ::ascii_info_detail to display information for all blocks KSP Object: (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: (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: (sub_) 1 MPI process type: seqaij rows=364, cols=364, bs=4 package used to perform factorization: petsc total: nonzeros=6640, allocated nonzeros=6640 using I-node routines: found 91 nodes, limit used is 5 linear system matrix, which is also used to construct the preconditioner: Mat Object: (sub_) 1 MPI process type: seqaij rows=364, cols=364, bs=4 total: nonzeros=6640, allocated nonzeros=6640 total number of mallocs used during MatSetValues calls=0 using I-node routines: found 91 nodes, limit used is 5 linear system matrix, which is also used to construct the preconditioner: Mat Object: 2 MPI processes type: mpiaij rows=676, cols=676, bs=4 total: nonzeros=12688, allocated nonzeros=12688 total number of mallocs used during MatSetValues calls=0 Number of SNES iterations = 2