Absolute/convective secondary instabilities and the role of confinement in free shear layers
arXiv:1707.07558 · doi:10.1103/PhysRevFluids.3.053901
Abstract
Mixing layers can grow in time or space by vortex pairings that succeed each other in a nearly self-similar way. We use a point vortex model to study how confinement eventually limits this growth process, leading us to propose a wavelength selection mechanism for free shear layers with counterflow.
arXiv comment20 pages, 9 figures