Appearance of Unstable Buoyant Jet

by Habib O. Anwar, Principal Scientific Ofcr.; Hydr. Res. Sta., Wallingford, Berks, England,

Serial Information: Journal of the Hydraulics Division, 1972, Vol. 98, Issue 7, Pg. 1143-1156

Document Type: Journal Paper


The flow of a turbulent vertical plume in a stagnant ambient fluid of uniform density was examined theoretically and experimentally. It was shown that a real solution to the equations of motion exists when the densimetric Froude number exceeds a critical value. Below this value the experiments showed that the flow in the plume was laminar over a certain length. It was observed that this length decreased markedly with an increase of the jet Reynolds number and was accompanied by increase in dilution at the boil.

Subject Headings: Jets (fluid) | Fluid flow | Turbulent flow | Plumes | Equations of motion | Density currents | Froude number | Laminar flow

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