# Chapter 4 - Flow of Fluids through Granular Beds and Packed Columns¶

## Page 231 Example 4.1¶

In [1]:
from __future__ import division
from math import pi
from sympy import symbols,solve
#Calculating modified reynold's no.
a = 800#                #it is in m**2/m**3
Product_rate = 0.5#     #it is in g/sec
Reflux_ratio = 8#
Vapour_rate  = 4.5#     #it is in g/sec
G = (4.5*10**(-3))/((pi/4)*(0.1**2))## units are in kg/m**2.sec
meu = 0.02*10**(-3)#               #units are in Ns/m**2
e = 0.72#

Re1 = G/(800*0.28*0.02*10**(-3))#
print"\n The modified reynolds no. is %d"%(Re1)#

x = 4.17/Re1 + 0.29# #x = R1/(pu1**2)
print"\n The value of R1/(pu1**2) is %.3f  "%(x)#

l = 16*0.15#         #in meters
#Solving the integral integral of(pdP)from Pc toPs =(R1/pu**2)*S*(1-e)*G**2*l/e**3

Pc = symbols('Pc')
y = solve(151.3-(4.73*10**(-5)*(8000**2-Pc**2)))
print"\n The value of Pc is %dN/m**2"%(y[0])#

 The modified reynolds no. is 127

The value of R1/(pu1**2) is 0.323

The value of Pc is -7797N/m**2