Discharge Coefficient

Discharge coefficient, abbreviated as \(C_d\), also called coefficient of discharge, a dimensionless number, is the ratio of actual discharge to the theoretical discharge.

 

Discharge Coefficient formula
\(\large{ C_d =   \frac { \dot m_f }  {  \rho \; Q }  }\)
Symbol	English	Metric
\(\large{ C_d }\) = discharge coefficient	\(\large{ dimensionless }\)
\(\large{ \rho }\)  (Greek symbol rho) = density of fluid	\(\large{\frac{lbm}{ft^3}}\)	\(\large{\frac{kg}{m^3}}\)
\(\large{ \dot m_f }\) = mass flow rate	\(\large{\frac{lbm}{sec}}\)	\(\large{\frac{kg}{s}}\)
\(\large{ Q }\) = volumetric flow rate	\(\large{\frac{ft^3}{sec}}\)	\(\large{\frac{m^3}{s}}\)