| (1) | 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
\beta = \frac{d}{D} | dimensionless area ratio |
d | orifice diameter |
D | pipe diameter |
{\rm Re} | Reynolds number |
See also
Physics / Fluid Dynamics / Pipe Flow Dynamics / Pipe Flow Simulation (PFS) / Pipeline Choke @model
Pipeline Engineering / Pipeline / Choke