Orifice Area

Orifice Area formula
$A_0 \;=\; Q \;/\; C_d \; \sqrt{ 2 \; G \; h_c }$ (Orifice Area) $Q \;=\; A_o \; C_d \; \sqrt{ 2 \; G \; h_c }$ $C_d \;=\; Q \;/\; A_o \; \sqrt{ 2 \; G \; h_c }$ $G \;=\; ( Q \;/\; C_d \; A_o )^2 \;/\; 2 \; h_c$ $h_c \;=\; ( Q \;/\; A_o \; C_d )^2 \;/\; 2 \; G$
Symbol	English	Metric
$A_o$ = Orifice Area	$in^2$	$mm^2$
$Q$ = Orifice Flow Rate	$ft^3 \;/\; sec$	$m^3 \;/\; s$
$C_d$ = Orifice Discharge Coefficient	$dimensionless$	$dimensionless$
$G$ = Orifice Gravitational Constant	$lbf-ft^2 \;/\; lbm^2$	$N - m^2 \;/\; kg^2$
$h_c$ = Orifice Center of Head	$in$	$mm$

Orifice area is the area cross-section of an orifice, which is a small opening or hole through which fluid flows. The orifice area is an important parameter in fluid dynamics and flow calculations, particularly in applications such as pipes, nozzles, and valves.

Geometric Orifice Area (GOA) - The orifice opening
Effective Orifice Area (EOA) - The minimal cross-section area of the downstream jet.
Contraction Coefficient ( $C_c$ ) - The ratio of the area measured at the vena contracta (EOA), to the area of the orifice (GOA) or $C_c = EOA \;/\; GOA$
Discharge Coefficient ( $C_d$ ) - The ratio of actual flow to ideal flow or $C_d = Q_a \;/\; Q_i$

Orifice Area

Orifice Area formula

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