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

p_{out} - p_{in} =  \frac{\rho}{8.05 \, d^4_D \, C_D^2} \cdot  q^2

where

fluid  density

choke diameter

choke coefficient (see )


C_D = \frac{d_D}{d} + 0.3167 \cdot \left( \frac{d}{d_D} \right)^{0.6} + 0.025 \cdot \big [ \log {\rm Re} - 4 \big ]

where

internal diameter of the incharge/discharge pipe

Reynolds number


See also


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

Euler equation ]

Water Pipe Flow @model ]