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Transition beneath vortical disturbances. (English) Zbl 1296.76061
Davis, Stephen H. (ed.) et al., Annual review of fluid mechanics. Vol. 39. Palo Alto, CA: Annual Reviews (ISBN 0-8243-0739-9/hbk). Annual Review of Fluid Mechanics 39, 107-128 (2007).
Summary: Theory and computer simulations have led to advances in the fundamental understanding of how vortical disturbances induce transition in an underlying boundary layer. It is an intriguing process whereby the shear filters the disturbance, admitting only long streamwise wavelengths into the boundary layer. These develop into strong jets in the perturbation velocity field, which lift up into the upper portion of the layer. Then shorter wavelength perturbations trigger breakdown, ultimately producing a turbulent patch near the wall. Pertment linear theory has evolved with time, but only with recent computer simulations has it been fitted into a picture of transition beneath vortical disturbances.
For the entire collection see [Zbl 1106.76006].

MSC:
76F06 Transition to turbulence
76D10 Boundary-layer theory, separation and reattachment, higher-order effects
76-02 Research exposition (monographs, survey articles) pertaining to fluid mechanics
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