@wikipedia


Relates pressure drop   on the choke with the flowrate through the choke  arising from fluid friction with choke walls:

p_{in} - p_{out} =  \frac{\rho \cdot (1- \beta^4)}{0.125 \, \pi^2 \, d^4 \, C_d^2} \cdot  q^2

where

fluid  density

orifice diameter

pipe diameter 

dimensionless area ratio

See also


Physics / Fluid Dynamics / Pipe Flow Dynamics / Pipe Flow Simulation (PFS)

Pipeline Engineering / Pipeline / Choke

Euler equation ] [ Water Pipe Flow @model ]



Nafta Pipeline Toolkit.xls