# Venturi Tube Flow Rate

on . Posted in Fluid Dynamics

## Venturi Tube Flow Rate Formulas

$$\large{ Q = C_v \; A \sqrt {2 \; g \; h_l} }$$

$$\large{ Q = C_v \; A \sqrt { \frac { 2 \; p_l} {\rho} } }$$

Symbol English Metric
$$\large{ Q }$$ = volumetric flow rate / flow rate $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$
$$\large{ A }$$ = cross-section area $$\large{in^2}$$ $$\large{mm^2}$$
$$\large{ \rho }$$ (Greek symbol rho) = density $$\large{\frac{lbm}{ft^3}}$$   $$\large{\frac{kg}{m^3}}$$
$$\large{ C_v }$$ = flow coefficient dimensionless
$$\large{ g }$$ = gravitational acceleration $$\large{\frac{ft}{sec^2}}$$ $$\large{\frac{m}{s^2}}$$
$$\large{ h_l }$$ = head loss $$ft$$ $$m$$
$$\large{ p_l }$$ = pressure loss $$\large{\frac{lbf}{in^2}}$$ $$\large{Pa}$$

Tags: Flow Equations