lid velocity = 0.0204082, prandtl # = 1., grashof # = 1. 0 SNES Function norm 0.146194 0 KSP Residual norm 0.146194 1 KSP Residual norm < 1.e-11 1 SNES Function norm 2.50702e-05 0 KSP Residual norm 2.50702e-05 1 KSP Residual norm < 1.e-11 2 SNES Function norm < 1.e-11 SNES Object: 1 MPI process 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=2 total number of function evaluations=3 norm schedule ALWAYS Jacobian is built using colored finite differences on a DMDA SNESLineSearch Object: 1 MPI process 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: 1 MPI process type: fgmres restart=30, using Classical (unmodified) Gram-Schmidt Orthogonalization with no iterative refinement happy breakdown tolerance 1e-30 maximum iterations=10000, initial guess is zero tolerances: relative=1e-05, absolute=1e-50, divergence=10000. right preconditioning using UNPRECONDITIONED norm type for convergence test PC Object: 1 MPI process type: fieldsplit FieldSplit with MULTIPLICATIVE composition: total splits = 2, blocksize = 2 Solver info for each split is in the following KSP objects: Split number 0 Fields 0, 1 KSP Object: (fieldsplit_0_) 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: (fieldsplit_0_) 1 MPI process type: lu out-of-place factorization tolerance for zero pivot 2.22045e-14 matrix ordering: nd factor fill ratio given 5., needed 2.5576 Factored matrix follows: Mat Object: (fieldsplit_0_) 1 MPI process type: seqaij rows=196, cols=196, bs=2 package used to perform factorization: petsc total: nonzeros=8880, allocated nonzeros=8880 using I-node routines: found 49 nodes, limit used is 5 linear system matrix = precond matrix: Mat Object: (fieldsplit_0_) 1 MPI process type: seqaij rows=196, cols=196, bs=2 total: nonzeros=3472, allocated nonzeros=3472 total number of mallocs used during MatSetValues calls=0 using I-node routines: found 49 nodes, limit used is 5 Split number 1 Fields 0, 1 KSP Object: (fieldsplit_1_) 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: (fieldsplit_1_) 1 MPI process type: lu out-of-place factorization tolerance for zero pivot 2.22045e-14 matrix ordering: nd factor fill ratio given 5., needed 2.5576 Factored matrix follows: Mat Object: (fieldsplit_1_) 1 MPI process type: seqaij rows=196, cols=196, bs=2 package used to perform factorization: petsc total: nonzeros=8880, allocated nonzeros=8880 using I-node routines: found 49 nodes, limit used is 5 linear system matrix = precond matrix: Mat Object: (fieldsplit_1_) 1 MPI process type: seqaij rows=196, cols=196, bs=2 total: nonzeros=3472, allocated nonzeros=3472 total number of mallocs used during MatSetValues calls=0 using I-node routines: found 49 nodes, limit used is 5 linear system matrix = precond matrix: Mat Object: 1 MPI process type: seqaij rows=196, cols=196, bs=4 total: nonzeros=3472, allocated nonzeros=3472 total number of mallocs used during MatSetValues calls=0 using I-node routines: found 49 nodes, limit used is 5 Number of SNES iterations = 2