Venturi Meter Flow Rate

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

borda carnot 3Venturi meter flow rate measures the velocity of a fluid through a pipe.

Bernoulli's Equation

 

Venturi Meter Flow Rate Formula

\(\large{ Q =   A_2   \sqrt { \frac {     {2 \; \left ( p_1 \; - \; p_2 \right)}     }     { \rho \; \left(   1\; - \;    \left( \frac {A_2} {A_1}   \right) ^2       \right) }     }  }\)   

Where:

 Units English Metric
\(\large{ Q }\) = flow rate \(\large{\frac{ft^3}{sec}}\) \(\large{\frac{m^3}{s}}\)
\(\large{ A_1 }\) = area 1 \(\large{in^2}\) \(\large{mm^2}\)
\(\large{ A_2 }\) = area 2 \(\large{in^2}\) \(\large{mm^2}\)
\(\large{ p_1 }\) = pressure 1 \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ p_2 }\) = pressure 2 \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ \rho }\) = density of the fluid \(\large{\frac{lbm}{ft^3}}\)   \(\large{\frac{kg}{m^3}}\)

 

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Tags: Flow Equations