Nonlinear nonlocal analysis of cross-flow-dominated transition scenarios using dns-like resolution

Abstract

Crossflow-dominated laminar-turbulent transition is studied by nonlinear nonlocal theory (PSE) for the DLR swept-flat plate experiment. The strongly nonlinear stages of the transition process, i.e. the formation of high-frequency secondary instabilities, their linear and nonlinear growth as well as the subsequent disintegration of the secondary disturbance structures which is accompanied by a degradation of the stationary crossflow vortices are discussed. © 2006 Springer.