lid velocity = 0.0025, prandtl # = 1., grashof # = 1. 0 SNES Function norm 5.097713965974e-02 0 KSP Residual norm 4.478159123566e-01 1 KSP Residual norm 4.332482767356e-16 1 SNES Function norm 4.201124545582e-06 0 KSP Residual norm 1.665838611378e-05 1 KSP Residual norm 9.875827661505e-21 2 SNES Function norm 1.711759823120e-14 SNES Object: 4 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=2 total number of function evaluations=3 norm schedule ALWAYS Jacobian is built using colored finite differences on a DMDA SNESLineSearch Object: 4 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: 4 MPI processes 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: 4 MPI processes 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: 4 MPI processes type: superlu_dist rows=1600, cols=1600 package used to perform factorization: superlu_dist total: nonzeros=0, allocated nonzeros=0 SuperLU_DIST run parameters: Process grid nprow 1 x npcol 2 Using 3d decomposition with npdep 2 Equilibrate matrix TRUE Replace tiny pivots FALSE Use iterative refinement FALSE Processors in row 1 col partition 2 Row permutation LargeDiag_MC64 Column permutation METIS_AT_PLUS_A Parallel symbolic factorization FALSE Repeated factorization SamePattern linear system matrix, which is also used to construct the preconditioner: Mat Object: 4 MPI processes type: mpiaij rows=1600, cols=1600, bs=4 total: nonzeros=30720, allocated nonzeros=30720 total number of mallocs used during MatSetValues calls=0 Number of SNES iterations = 2