Water Flow Rate Through an Orifice

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Water Flow Rate Through an Orifice formula

$$Q_w = 0.0865 \cdot C_d \cdot \left( \frac {d_o} {4.654 } \right)^2 \cdot \sqrt { \frac { p_1 - p_2 } { SG } }$$

Where:

$$Q_w$$ = water flow rate

$$d_o$$ = diameter of orifice

$$C_d$$ = discharge coefficient

$$p_1$$ = primary pressure

$$p_2$$ = secondary pressure

$$SG$$ = water specific gravity