In fluid mechanics, the Roshko number is a dimensionless number describing oscillating flow mechanisms. It is named after the American Professor of Aeronautics Anatol Roshko. It is defined as

\[ \mathit{Ro} = {St} {Re} = {f L^{2}\over \nu} \]

where Ro is the dimensionless Roshko number, St is the dimensionless Strouhal number, Re is the Reynolds number, f is the frequency of vortex shedding, L is the characteristic length (for example hydraulic diameter) and ν is the kinematic viscosity of the fluid.

References

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External links

fa:عدد روشکو

pt:Número de Roshko ru:Число Рошко