Reynolds Number for Gas

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Reynolds Number for Gas Formula

\( Re \;=\; 20,100 \; ( SG \; Q \;/\; d \; \eta \;)  \) 
Symbol English Metric
\( Re \) = Reynolds number \( dimensionless \) 
\( Q \) = flow rate of gas \(ft^3\;/\;sec\) \(m^3\;/\;s\)
\( SG \) = gas specific gravity relative to water (water = 1) \( dimensionless \)
\( d \) = inside diameter of pipe \( in\) \( mm \)
\( \eta \)  (Greek symbol eta)  = viscosity of gas \(lbf - sec\;/\;ft^2\) \(Pa-s\)

 

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Tags: Heat Transfer Flow Gas Orifice and Nozzle Pipeline