Lift-induced vortex dipole collapse

Ravichandran, S and Dixit, Harish Nagaraj and Govindarajan, R (2017) Lift-induced vortex dipole collapse. Physical Review Fluids, 2 (034702). ISSN 2469-990X

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Two vortices of opposite sign in two dimensions merely move along parallel lines. We show that even a small buoyancy completely changes this dynamics. When the vortices are of different density from their surroundings, buoyancy produces a lateral drift by Kutta lift. This causes the density patches to merge, and the vortex dipole to collapse. This is followed by a rapid upward (for light vortices) ejection and creation of small-scale structures by baroclinic torque. Our simple analytical equation explains the trajectory of the vortices. We show that these events occur in viscous simulations of many buoyant vortices.

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IITH Creators:
IITH CreatorsORCiD
Dixit, Harish NagarajUNSPECIFIED
Item Type: Article
Subjects: Physics > Mechanical and aerospace
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 04 Apr 2017 10:30
Last Modified: 01 Sep 2017 11:08
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