# Square duct, two roughened opposite walls
# 
#   U2/Us   x100
#
#      X3/B= 0   -0.1    -0.2    -0.3    -0.4    -0.5    -0.6    -0.7    -0.8    -0.9
# X2/B
  0      0.02    -0.04   0.12    -0.01   -0.02   -0.13   -0.22   -0.25   -0.50   -0.90
 -0.1    0.21    0.10    0.16    0.07    -0.10   -0.13   -0.24   -0.25   -0.47   -0.71
 -0.2    0.41    0.27    0.29    0.06    -0.14   -0.11   -0.30   -0.14   -0.30   -0.62
 -0.3    0.69    0.53    0.45    0.06    -0.13   -0.24   -0.54   -0.37   -0.40   -0.57
 -0.4    0.99    0.79    0.59    0.12    -0.25   -0.69   -0.61   -0.31   -0.41   -0.56
 -0.5    1.45    1.12    0.78    0.18    -0.25   -0.63   -0.78   -0.57   -0.54   -0.45
 -0.6    1.89    1.69    1.07    0.29    -0.32   -0.80   -1.02   -0.84   -0.84   -0.60
 -0.7    2.43    1.86    1.26    0.32    -0.38   -0.90   -1.29   -1.02   -0.99   -0.57
 -0.8    2.51    1.96    1.39    0.37    -0.25   -0.77   -1.11   -1.12   -1.18   -0.73
 -0.9    1.77    1.23    1.02    0.42     0.03   -0.44   -0.69   -0.75   -1.00   -1.07

# Us (m/sec)      25.55
# Ub (m/sec)      19.11