DYNAMICS OF DIPOLE VORTICES IN THE INTERACTION WITH A SOLID BOUNDARY

The results of experiments on interaction between vortices and the wal l in a rotating parabolic vessel are presented. Through rotation, two- dimensional vortices are realized. The most attention is given to the role of the near-wall friction in the vorticity generation in the coll ision of a dipole with a wall and also the subsequent dynamics of the occurring vortex system. The generation of a satellite vortices (for e ach vortex from the dipole vortex system) is a natural result of the c ollision. The vortex satellite generated changes the distance between the initial vortex and the wall and intensifies interaction among the vortex structures. Since a decrease in the viscosity paradoxically res ults in the generation of more powerful vortices, the viscosity can ne ver be neglected. The results agree with the numerical experiments of other authors.