lid velocity = 100., prandtl # = 1., grashof # = 40000.
  0 SNES Function norm 1667.67
  1 SNES Function norm 227.403
  2 SNES Function norm 94.4608
  3 SNES Function norm 20.4338
  4 SNES Function norm 17.4824
  5 SNES Function norm 7.3683
  6 SNES Function norm 3.09882
  7 SNES Function norm 0.802497
  8 SNES Function norm 0.554518
  9 SNES Function norm 0.317551
 10 SNES Function norm 0.112427
 11 SNES Function norm 0.0653051
 12 SNES Function norm 0.0269511
 13 SNES Function norm 0.0119595
 14 SNES Function norm 0.0028156
 15 SNES Function norm 0.00123369
 16 SNES Function norm 0.000380486
 17 SNES Function norm 0.000176153
 18 SNES Function norm 4.13595e-05
 19 SNES Function norm 7.31965e-06
Number of SNES iterations = 19