Reynolds Number for Gas

on 24 November 2018. Posted in Fluid Dynamics

Reynolds Number for Gas Formula
\(\large{ Re = 20,100 \; \frac{ SG \; Q }{ d \; \eta } }\)
Symbol	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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Reynolds Number for Gas Formula