base.rea
3                      spatial dimension  ( < 0 --> generate .rea/.re2 pair)
1                      number of fields
#=======================================================================
#
#    Example of .box file for channel flow
#
#    If nelx (y or z) < 0, then genbox automatically generates the
#                          grid spacing in the x (y or z) direction
#                          with a geometric ratio given by "ratio".
#                          ( ratio=1 implies uniform spacing )
#
#    Note that the character bcs _must_ have 3 spaces.
#
#=======================================================================
#
Box
-8  -8  -8                                          nelx,nely,nelz for Box
0 8 1.                                              x0,x1,gain  (rescaled in usrdat)
-1.0 -0.96 -0.75 -0.45 0.00 0.45 0.75 0.96 1.00     y0,y1,...,yn
0 4 1.                                              z0,z1,gain
P  ,P  ,P  ,P ,P  ,P                               bc's  (3 chars each!)