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dc.contributor.authorRadko, Timour
dc.date.accessioned2014-06-06T22:50:04Z
dc.date.available2014-06-06T22:50:04Z
dc.date.issued2008
dc.identifier.citationJ. Fluid Mech. (2008), vol. 610, pp. 285–310.
dc.identifier.urihttp://hdl.handle.net/10945/42118
dc.descriptionThe article of record as published may be found at http://dx.doi.org/10.1017/S0022112008002632en_US
dc.description.abstractThis study explores the interaction of two nearly axisymmetric two-dimensional vortices using a combination of numerical simulations and analytical arguments. We consider isolated or ‘shielded’ eddies, characterized by zero net vorticity. The ability of such vortices to propagate and interact is associated with the small dipolar component that is introduced initially. Numerical contour dynamics experiments indicate that the interaction of shielded eddies takes one of two forms, depending on their initial separation and on the relative orientation of their dipolar components. Eddies can influence each other by remotely modifying the dipolar moments of partner vortices, an effect manifested in a gentle deflection of their trajectories from a straight course. Strong interactions occur when eddies collide and rebound. The remote interaction is explained by weakly nonlinear theory in which the basic state consists of identical circularly symmetric eddies and the perturbation is assumed to be small. It is argued that the elastic rebounds observed during direct collisions are induced by the exchange of fluid between colliding vortices.en_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleLong-range interaction and elastic collisions of isolated vorticesen_US
dc.typeArticleen_US
dc.contributor.departmentOceanography


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