On the Interaction Between Turbulence and Stratification

Download or read book On the Interaction Between Turbulence and Stratification written by Pierre Léard and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coupled dynamics between turbulent and stratified layers are often encountered in geophysical and astrophysical flows, for example in the earth's atmosphere, oceans and core, but also in stars. Due to the large space- and time-scale difference between the phenomenon involved in the two layers, their interaction is sometimes overlooked. Still, the turbulent motions enhance mixing at the interface and generate internal gravity waves which propagate in the stratified layer. Those waves extract energy from the convective layer and distribute this energy along their propagation path. They also carry chemicals and bio-elements. Therefore, the comprehension of the coupled dynamics of a turbulent layer interacting with a stratification one is essential in order to build reliable models predicting the long-time evolution of those flows. This interaction is studied with experiments, numerical simulations and theoretical modelling.