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Interaction of an along-shore propagating vortex with a vortex enclosed in a circular bay ArchiMer
Ryzhov, Eugene A.; Koshel, Konstantin V.; Sokolovskiy, Mikhail A.; Carton, Xavier.
A simple dynamical model of vortex interactions taking place near a curved boundary mimicking a circular bay is formulated and examined. An initial configuration consisting of a point vortex in the bay and of an incident point vortex moving toward the bay along the straight part of the boundary is considered. Both vortices are of equal strengths. Typical stationary regimes of the bay-bound vortex when the incident vortex is far from the bay are obtained. When the incident vortex comes near the bay, its interaction with the bay-bound one may result in irregular motion of both vortices. Typical outcomes of the interaction are established to be (i) the incident vortex passes over the bay without forcing the bay-bound vortex to leave the bay; (ii) the incident...
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00600/71249/69624.pdf
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Baroclinic multipole formation from heton interaction ArchiMer
Sokolovskiy, Mikhail A.; Carton, Xavier.
In a two-layer quasi-geostrophic model, the interaction between two opposite-signed hetons (baroclinic vortex pairs) is studied analytically and numerically, for singular and finite-area vortices. For point vortices, using trilinear coordinates, it is shown that the possible evolutions depend on the deformation radius Rd: for large Rd, the layers decouple, vortices pair in each layer and their trajectories are open; for medium Rd, the exchange of opposite-sign partners between layers becomes possible; for small Rd, two other regimes appear: one where hetons remain unaltered during their evolution but follow open trajectories, and one where hetons occupy only a bounded subdomain of space at all times. Conditions for invariant co-rotation of the heton pair...
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Ano: 2010 URL: http://archimer.ifremer.fr/doc/00002/11351/7924.pdf
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