lid velocity = 100., prandtl # = 1., grashof # = 40000.
  0 SNES Function norm 1667.67
  1 SNES Function norm 785.497
  2 SNES Function norm 403.895
  3 SNES Function norm 253.13
  4 SNES Function norm 108.032
  5 SNES Function norm 11.304
  6 SNES Function norm 0.111999
  7 SNES Function norm 8.05978e-06
Number of SNES iterations = 7