Speaker
Klaus Widmayer
Description
Abstract: As is well known, perturbations of Couette flow in the 3d Navier-Stokes equations experience phase mixing, which stabilizes fluid motion. In the presence of suitable rotational forces or stratification, additionally dispersive internal gravity or inertial waves arise. These two mechanisms are of fundamentally different nature and relevant in complementary dynamical regimes. We will discuss how their combined effect leads to a quantitatively improved stability
This is based on joint work with M. Coti Zelati and A. Del Zotto.