lid velocity = 0.00591716, prandtl # = 1., grashof # = 1. 0 SNES Function norm 0.0788695 0 KSP Residual norm 0.322249 1 KSP Residual norm < 1.e-11 1 SNES Function norm 7.43947e-06 0 KSP Residual norm 1.66117e-05 1 KSP Residual norm < 1.e-11 2 SNES Function norm 1.155e-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: gmres 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. left preconditioning using PRECONDITIONED norm type for convergence test PC Object: 1 MPI process type: lu out-of-place factorization tolerance for zero pivot 2.22045e-14 matrix ordering: external factor fill ratio given 0., needed 0. Factored matrix: Mat Object: 1 MPI process type: umfpack rows=676, cols=676 package used to perform factorization: umfpack total: nonzeros=0, allocated nonzeros=0 UMFPACK run parameters: Control[UMFPACK_PRL]: 1. Control[UMFPACK_STRATEGY]: 0. Control[UMFPACK_DENSE_COL]: 0.2 Control[UMFPACK_DENSE_ROW]: 0.2 Control[UMFPACK_AMD_DENSE]: 10. Control[UMFPACK_BLOCK_SIZE]: 32. Control[UMFPACK_FIXQ]: 0. Control[UMFPACK_AGGRESSIVE]: 1. Control[UMFPACK_PIVOT_TOLERANCE]: 0.1 Control[UMFPACK_SYM_PIVOT_TOLERANCE]: 0.001 Control[UMFPACK_SCALE]: 1. Control[UMFPACK_ALLOC_INIT]: 0.7 Control[UMFPACK_DROPTOL]: 0. Control[UMFPACK_IRSTEP]: 0. Control[UMFPACK_ORDERING]: AMD (not using the PETSc ordering) linear system matrix, which is also used to construct the preconditioner: Mat Object: 1 MPI process type: seqaij rows=676, cols=676, bs=4 total: nonzeros=12688, allocated nonzeros=12688 total number of mallocs used during MatSetValues calls=0 using I-node routines: found 169 nodes, limit used is 5 Number of SNES iterations = 2