Two-Dimensional Air-Bubble Plume

by Iver Brevik, Lect.; Luftkriegsskolen (Royal Norwegian Air Force Academy), Trondheim, Norway,

Serial Information: Journal of the Waterway, Port, Coastal and Ocean Division, 1977, Vol. 103, Issue 1, Pg. 101-115

Document Type: Journal Paper

Abstract: Bubbles rising from a row of orifices along a pipe produce a water current which can be regarded as two-dimensional. This device is of great practical interest, e.g., for the protection of limited areas against sea waves or spreading of soil. This paper deals with the theory of the vertical current above the pipe, involving the use of the balance equations for momentum and kinetic energy and the conservation equation for the emitted air. The purpose is to calculate the vertical center line velocity and the lateral spread. Information from large-scale experiments of Kobus and Bulson is used to estimate the parameters in the theory.

Subject Headings: Water pipelines | Sea water | Seas and oceans | Ocean waves | Kinetics | Energy efficiency |

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