Reynolds Number for Gas

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Reynolds Number for Gas Formula

\(\large{ Re = 20,100 \; \frac{ SG \; Q }{ d \; \eta }  }\)   

Where:

 Units English Metric
\(\large{ Re }\) = Reynolds number  \(\large{ dimensionless }\) 
\(\large{ Q }\) = flow rate of gas \(\large{\frac{ft^3}{sec}}\) \(\large{\frac{m^3}{s}}\)
\(\large{ SG }\) = gas specific gravity relative to water (water = 1) \(\large{ dimensionless }\)
\(\large{ d }\) = inside diameter of pipe \(\large{ in}\) \(\large{ mm }\)
\(\large{ \eta }\)  (Greek symbol eta)  = viscosity of gas \(\large{\frac{lbf - sec}{ft^2}}\) \(\large{Pa-s}\)

 

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Tags: Flow Equations Gas Equations