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The pressure field due to a large circular capped air bubble rising in water

Published online by Cambridge University Press:  29 March 2006

G. M. Lazarek  and
H. Littman
G. M. Lazarek
Affiliation:
Fluid Chemical and Thermal Processes Division, Rensselaer Polytechnic Institute, Troy, New York, 12181 Present address: Knolls Atomic Power Laboratory, General Electric Company, Schenectady, New York.
H. Littman
Affiliation:
Fluid Chemical and Thermal Processes Division, Rensselaer Polytechnic Institute, Troy, New York, 12181
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Abstract

The pressure field due to a large circular capped air bubble rising in water has been determined experimentally. The results verify the Davies & Taylor cap boundary condition and the frontal pressure field is well approximated by that due to irrotational flow around an oval body.

The pressure field extends axially as far as ten bubble half-widths below the bubble floor. Immediately below the floor the pressure is constant for about two-thirds of a bubble height. The wake is closed and contains symmetric pressure minima. For the bubbles studied, turbulence, as well as the diffusion of vorticity, probably controls the momentum distribution and energy dissipation in the wake.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 66 , Issue 4 , 11 December 1974 , pp. 673 - 687
Copyright
© 1974 Cambridge University Press

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