Screens_ND
The function Screens_ND(Re, porosity: f,j_H) returns the friction factor (f), and Colburn j factor (j_H) for a perfectly stacked array of woven screens.
Inputs:
Re - reynolds number defined as follows:
where,
, 
porosity (p) - volume of interconnected voids/volume of the matrix [-]
Ouputs:
f - friction factor [-]
j_H - Colburn j factor defined as follows:
where,
Example:
porosity=0.78 [-]
Re=2000 [-]
Call screens_nd(Re,porosity: f,j_H)
{Solution:
f=0.3604
j_H=0.03393
}
Notes: This function is called by Screens to determine the friction factor and Colburn j factor. The data is based on experimental results found in Kays and London (1984)