---------- Dimensionless reverse flow rate --------------
        
                      Q=0        Q=180      Q=360      Q=540 (l/min)  
       Qr/Uo*H        

  X/Xr=   0            0          0          0          0           
  X/Xr=   0.2          3.1025     2.892      3.03       3.02           
  X/Xr=   0.3          4.964      4.667      4.545      4.121           
  X/Xr=   0.4          5.8905     5.936      5.559      4.501           
  X/Xr=   0.5          6.05375    6.0383     5.384      4.833           
  X/Xr=   0.6          5.155      5.1353     4.764      3.794           
  X/Xr=   0.7          3.8283     3.564      3.08       2.54           
  X/Xr=   0.8          1.8778     1.696      1.38       1.33          
  X/Xr=   0.9          0.61975    0.36075    0.33       0.173           
  X/Xr=   1            0          0          0          0