NUMERICAL SIMULATION of the INTERFACES of a JET STREAM

This paper aims to study the evolution of interfaces of a jet stream flowing in a stationary medium. The medium and the jet stream have been considered inviscid, surface tension effects have been neglected and there is a density jump across the interface between the stream and the media, within the jet stream and outside in the surrounding media density remains uniform. Due to discontinuity in velocities across the interface there exists vorticity at these interfaces and hence they have been modelled as a vortex sheet, everywhere else the system is assumed irrotational. The motion of the interfaces has been studied through the evolution of these vortex sheets which have been assumed to be comprised of a finite number of point vortices. The results indicate that the interface develops more roll ups for smaller Atwood numbers.