منابع مشابه
Vortex rings in ferromagnets
Vortex ring solutions are presented for the Landau-Lifshitz equation, which models the dynamics of a three-dimensional ferromagnet. The vortex rings propagate at constant speed along their symmetry axis and are characterized by the integer-valued Hopf charge. They are stable to axial perturbations, but it is demonstrated that an easy axis anisotropy results in an instability to perturbations wh...
متن کاملMonopole-antimonopole and Vortex Rings
The SU(2) Yang-Mills-Higgs theory supports the existence of monopoles, antimonopoles, and vortex rings. In this paper, we would like to present new exact static antimonopole-monopole-antimonopole (A-M-A) configurations. The net magnetic charge of these configurations is always negative one, whilst the net magnetic charge at the origin is always positive one for all positive integer values of th...
متن کاملMonopoles, Antimonopoles and Vortex Rings
Introduction Defects, classical solutions of spontaneously broken gauge theories, where the Higgs field vanishes at points, lines or surfaces, are relevant in particle physics and cosmology. Monopoles, for instance, represent zero-dimensional defects, vortex solutions or strings are associated with one-dimensional defects, domain walls represent two-dimensional defects. Here we present new clas...
متن کاملReconnection of colliding vortex rings.
We investigate numerically the Navier-Stokes dynamics of reconnecting vortex rings at small Reynolds number for a variety of configurations. We find that reconnections are dissipative due to the smoothing of vorticity gradients at reconnection kinks and to the formation of secondary structures of stretched antiparallel vorticity which transfer kinetic energy to small scales where it is subseque...
متن کاملDynamics of thin vortex rings
As part of a long-range study of vortex rings, their dynamics, interactions with boundaries and with each other, we present the results of experiments on thin core rings generated by a piston gun in water. We characterize the dynamics of these rings by means of the traditional equations for such rings in an inviscid fluid suitably modifying them to be applicable to a viscous fluid. We develop e...
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 1995
ISSN: 1070-6631,1089-7666
DOI: 10.1063/1.868752