Pattern preservation during the decay and growth of localized wave packet in two-dimensional channel flow
Pattern preservation during the decay and growth of localized wave packet in two-dimensional channel flow
In this paper, the decay and growth of localized wave packet (LWP) in a two-dimensional plane-Poiseuille flow are studied numerically and theoretically. When the Reynolds number (Re) is less than a critical value Rec, the disturbance kinetic energy Ek of LWP decreases monotonically with time and experiences three decay periods, …