conj_ht.rea
2                         (spatial dimension)
2                         (number of fields)
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Box fluid
-16  6                     (nelx,nely,nelz for Box 1)
0.0   8.0   1.0
0.5   0.6   0.75  1.0  1.25  1.4   1.5
v  ,O  ,W  ,W             velocity bc's: Xleft Xright Ybottom Ytop)
t  ,O  ,E  ,E             temperature BCs
Box lower wall
-16  3
0.0  8.0   1.0
0.0 0.2 0.4 0.5
   ,   ,   ,              no velocity bc's
I  ,I  ,t  ,E             temperature BCs
Box upper wall
-16  3
0.0   8.0   1.0
1.5   1.6   1.9   2.0
   ,   ,   ,              no velocity bc's
I  ,I  ,E  ,t             temperature BCs