Generation of Secondary Motions in the Field of a Vortex

Abstract

The investigation is concerned with motions in the region of the core of a vortex which exhibit peripheral vorticity. From theoretical reasoning it appears that development of such motions is favored as a zonal maximum of axially vorticity components is produced, e.g., by divergence of the vortex core. Several experiments devised to verify theoretical conclusions furnish evidence that concentrations of vorticity periodic about the perimeter actually do occur as expected.