Kelvin-Helmholtz instability

A flat vortex sheet of constant strength separates two streams of fluid moving in opposite directions. When the sheet is given a small perturbation, it rolls up into a periodic array of spiral vortices. The simulations below use a regularized point vortex method to track the motion of the sheet.


Krasny, R. (1986) Desingularization of periodic vortex sheet roll-up, J. Comput. Phys. 65, 292-313

Krasny, R. (1988) Numerical simulation of vortex sheet evolution, Proc. IUTAM Symp. on "Fundamental Aspects of Vortex Motion", H. Hasimoto & T. Kambe (eds.), Fluid Dyn. Res. 3, 93-97, North-Holland