eddy_uv.rea
2                      spatial dimension
1                      number of fields
#
#  Eddy case
#
Box
-16  -16                      nelx,nely,nelz for Box
0   1.  1.                    x0 x1 ratio 
0   1.  1.                    y0 y1 ratio 
P  ,P  ,P  ,P  ,              bc's