M.A. Sokolovskiy, J. Verron, X.J. Carton. The formation of new quasi-stationary vortex patterns from the interaction of two identical vortices in a rotating fluid. Ocean Dynamics, 2018, v. 68, N 6, pp. 723-733.
Within the framework of the quasi-geostrophic approximation, the interactions of two identical initially circular vortex patches are studied using the contour dynamics/surgery method. The cases of barotropic vortices and of vortices in the upper layer of a two-layer fluid are considered. Diagrams showing the end states of vortex interactions and, in particular, the new regime of vortex triplet formation are constructed for a wide range of external parameters. This paper shows that, in the nonlinear evolution of two such (like-signed) vortices, the filaments and vorticity fragments surrounding the merged vortex often collapse into satellite vortices. Therefore, the conditions for the formation and the quasi-steady motions of a new type of triplet-shaped vortex structure are obtained.
2019Kurakin L.G., Lysenko I.A., Ostrovskaya I.V., Sokolovskiy M.A. On stability of the Thomson’s vortex N-gon in the geostrophic model of the point vortices in two-layer fluid. Journal of Nonlinear Science, 2019, v. 29, N 4, pp. 1659-1700
2019L.Lokshina, V.Vavilin, Y.Litti, M.Glagolev, A.Sabrekov, M.Kozlova. Methane Production in a West Siberian Eutrophic Fen is Much Higher than Carbon Dioxide Production: Incubation of Peat Samples, Stoichiometry, Stable Isotope Dynamics, Modeling