The strength of vortex and swirling core flows

• DOI: 10.1017/s002211206900019x
• Publication Date: 2006-03-29T03:09:23Z
• Authors: B. R. Morton
• Keywords: Circulation (fluid dynamics)

This note presents a discussion of the roles axial momentum flux, flow force, angular flux and circulation in determining strength hence characterizing structure such narrow rotating axisymmetric core flows as swirling jets, vortex sink vortices wakes. The salient (though sometimes neglected) features these are that perturbation pressure plays an essential role both coupling azimuthal velocity fields transmission force along core, is invariant only cores with zero gross circulation. A number existing solutions brought into relationship by discussion, including Long's similarity solution for draining Reynolds’ dimensional treatment