Water Flow Rate Through an Orifice

on 07 April 2016. Posted in Fluid Dynamics

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Water Flow Rate Through an Orifice formula
\( Q_w \;=\; 0.0865 \; C_d \; ( d_o\;/\;4.654 )^2 \; \sqrt{ p_1 - p_2 \;/\; SG } \)
Symbol	English	Metric
\( Q_w \) = water flow rate	\(ft^3\;/\;se\)	\(m^3\;/\;s\)
\( C_d \) = orifice discharge coefficient	\(dimensionless\)	\(dimensionless\)
\( d_o \) = diameter of orifice	\( in \)	\( mm \)
\( p_1 \) = primary pressure	\(lbf\;/\;in^2\)	\(Pa\)
\( p_2 \) = secondary pressure	\(lbf\;/\;in^2\)	\(Pa\)
\( SG \) = specific gravity of water	\(dimensionless\)	\(dimensionless\)

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