Chapter 12 : Gas liquid flow

Example 12.1 page no : 421

#Calculate the eta and slip velocity

# variables
ratio_Q=10.                          #dimentionless (ratio of Qg to Ql)
Vl=2.06                              #ft/s

# calculation
x=3.5/ratio_Q                        #dimentionless
eta=1.0/(1+x)                        #dimentionless
Vl_avg=Vl/(1-eta)                    #ft/s
Vg_avg=ratio_Q*Vl/eta                #ft/s
V_slip=Vg_avg-Vl_avg                 #ft/s

# result
print "Eta = %f\n"%eta
print "The slip velocity is %f ft/s"%V_slip

Eta = 0.740741

The slip velocity is 19.864286 ft/s