Choke discharge coefficient

Input(s)

d: Upstream Pipe Diameter (in.)

$d_{c}$ : Choke Diameter (in.)

$N_{R}$ : Reynold's Number based on $\mathrm{d}_{\mathrm{c}}$ (dimensionless)

Output(s)

$C_{d}$: Choke Discharge Coefficient (dimensionless)

Formula(s)

$$ C_{d}=\left(\frac{d_{c}}{d}\right)+\left(\frac{0.3167}{\left(\frac{d_{c}}{d}\right)^{0.6}}\right)+0.025 *\left(\log \left(N_{R}\right)-4\right) $$

Reference(s)

Boyun, G., William, C., \& Ali Ghalambor, G. (2007). Petroleum Production Engineering: A Computer-Assisted Approach, Page: 5/60.