Stability of new relative equilibria of the system of three point vortices in a circular domain
Russian Journal of Nonlinear Dynamics, 2011, vol. 7, no. 1, pp. 119-138
Abstract
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This paper presents aštopological approach tošthe search and stability analysis ofšrelative equilibria ofšthree point vortices ofšequal intensities. Itšisšshown that the equations ofšmotion can bešreduced byšone degree ofšfreedom. Wešhave found two new stationary configurations (isosceles and non-symmetrical collinear) and studied their bifurcations and stability.
Keywords:
point vortex, reduction, bifurcational diagram, relative equilibriums, stability, periodic solutions
Citation:
Borisov A. V., Mamaev I. S., Vaskina A. V., Stability of new relative equilibria of the system of three point vortices in a circular domain, Russian Journal of Nonlinear Dynamics, 2011, vol. 7, no. 1, pp. 119-138
Problems of stability and asymptotic behavior of vortex patches on the plane
Russian Journal of Nonlinear Dynamics, 2010, vol. 6, no. 2, pp. 327-343
Abstract
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With the help ofšmathematical modelling, wešstudy the dynamics ofšmany point vortices system onšthe plane. For this system, wešconsider the following cases:
?švortex rings with outer radius $r = 1$šand variable inner radius $r_0$,
?švortex ellipses with semiaxesš$a$, $b$.
The emphasis isšonšthe analysis ofšthe asymptotic $(t ? ?)$ behavior ofšthe system and onšthe verification ofšthe stability criteria for vorticity continuous distributions.
Keywords:
vortex dynamics, point vortex, hydrodynamics, asymptotic behavior
Citation:
Vaskin V. V., Vaskina A. V., Mamaev I. S., Problems of stability and asymptotic behavior of vortex patches on the plane, Russian Journal of Nonlinear Dynamics, 2010, vol. 6, no. 2, pp. 327-343