Le séminaire a lieu le jeudi
19 juin 2003 de 14h30 à 15h30
dans la salle de réunion
du PHC (Observatoire de Nice).
Direct numerical simulations of streak breakdown in boundary layers
Numerical simulations of bypass transition in Blasius boundary layers
are presented. The breakdown of streamwise streaks is first considered
in the case of the steady, spanwise periodic basic flows arising from
the nonlinear saturation of optimal perturbations and then in the case
of transition in boundary layers subject to free-stream
turbulence. Similarity and differences with previous work is
discussed