The effects of density stratification and turbulence on the behavior of vortex rings and vortex pairs is investigated. The results of a vortex ring experiment, in which rings were injected into linear and discontinuous density stratifications, are compared with calculations of ring behavior made using an axisymmetric, unsteady solution of the modeled Reynolds stress equations. Second-order closure of the equations is based upon the invariant modeling technique of Donaldson. Comparisons are made for ring trajectories, radius, and size of the recirculation cell carried along with the ring, with excellent results. Calculations of turbulent vortex pairs descending into a stably stratified atmosphere for a range of Froude numbers from 1 to 10 are presented. (DePo)
Turbulent vortices in stratified fluids
Turbulente Wirbel in laminaren Fluessigkeiten
AIAA-Papers ; 1-17
1979
17 Seiten, 17 Bilder, 1 Tabelle, 31 Quellen
Conference paper
English
Turbulent vortices in stratified fluids
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