Accession Number : ADP002262

Title :   The Break-up Mechanism of a Streamwise Directed Vortex,

Corporate Author : TRONDHEIM UNIV (NORWAY) INST FOR MEKANIKK

Personal Author(s) : Persen,L. N.

Report Date : JUL 1983

Pagination or Media Count : 5

Abstract : The present paper considers the possible break-up mechanism of a vortex with its axis parallel to the direction of the mean flow. Such streamwise directed vortices have been considered first of all by G.I. Taylor (1) in his famous investigation of the stability of the flow between two concentric cylinders. H. Gorlter (2) has made his studies of streamwise directed vortices along a concave wall. In both these cases the vortices created seem to be very stable in the side-wise direction. However, the G.I. Taylor vortices do not change in the direction of the mean flow, and thus do not exhibit any breakup mechanisms. In very many cases encountered under different flow conditions the breakup of a stream-wise directed vortex occurs after a certain distance downstream, and it is the purpose of this presentation to exhibit a possible mechanism whereby such a break-up can occur. This mechanisms is inherent in the basic equations of the flow, and as such may also be exhibited on the equations of motion a non-viscous fluid. (Author)

Descriptors :   *Vortices, *Flow fields, *Stability, Equations of motion, Viscous flow, Downstream flow

Distribution Statement : APPROVED FOR PUBLIC RELEASE