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PERTURBED CROSS-FLOW BOUNDARY LAYER: NONTRIVIAL EFFECTS OF THE OBLIQUITY ANGLE AT SMALL AND HIGH REYNOLDS NUMBERS

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We carry out an exploratory linear study on the transient dynamics of arbitrary three-dimensional perturbations acting on the Falkner-Skan-Cooke cross-flow boundary layer. The analysis is in particular focused on the effects of the direction of the perturbations at low and high Reynolds numbers. We show evidence of a non-trivial dependency of the transient and asymptotic behavior on the travelling waves obliquity with respect to the base flow.

Author(s):

Francesca De Santi    
Politecnico di Torino
Italy

Stefania Scarsoglio    
Politecnico di Torino
Italy

William O. Criminale    
University of Washinghton
United States

Daniela Tordella    
Politecnico di Torino
Italy