Research Article
Jun 1981
Vortex Dynamics and Bifurcation of Buoyant Jets in Crossflow
Authors: Gerhard H. Jirka, M.ASCE, and Henry L.M. FongAuthor Affiliations
Publication: Journal of the Engineering Mechanics Division
Volume 107, Issue 3
Abstract
A model is developed which predicts the integral behavior of buoyant or nonbuoyant jets in crossflow with the superimposed effect of the counterrotating internal vortex structure which exists in a plane normal to the jet trajectory. Despite some real fluid effects, such as finite vortex core size and turbulent growth, classical irrotational vortex pair theory is an adequate first-order model for the motions induced in the surrounding fluid. If these outside motions are constrained—either by a fluid boundary or by the effects of density stratification—then a repulsive force mechanism is created. This force leads to bifurcation of the bent-over jet into two separate elements with undiluted fluid in between. The theory shows excellent agreement with available experimental data for homogenous crossflow of finite depth. An application to hypothetical cases of stratified crossflow predicts different environmental conditions under which jet bifurcation can occur.
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Published In
Journal of the Engineering Mechanics Division
Volume 107 • Issue 3 • June 1981
Pages: 479 - 499
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Jun 1981
Published online: Feb 3, 2021
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Authors
Affiliations
Gerhard H. Jirka, M.ASCE
Asst. Prof., School of Civ. and Environmental Engrg., Cornell Univ., Ithaca, N.Y. 14853
Henry L.M. Fong
Staff Engr., Tetra Tech Inc., Melville, N.Y. 11747; formerly Grad. Student, School of Civ. and Environmental Engrg., Cornell Univ., Ithaca, N.Y. 14853
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