Saturation of a large scale instability and non linear stuctures in a rotating stratified flow

TL;DR

This paper investigates the nonlinear structures formed from the saturation of large-scale instabilities in rotating stratified flows, revealing helical kink formations linked to stationary points across various Rayleigh and Taylor numbers.

Contribution

It introduces the nonlinear helical kink structures resulting from the saturation of large-scale instabilities in rotating stratified fluids with small-scale turbulence.

Findings

Identification of helical kink structures in saturated instabilities

Solutions linking different stationary points for various Rayleigh and Taylor numbers

Insight into nonlinear dynamics of rotating stratified flows

Abstract

In this letter, we present non linear structures resulting from the saturation of a large scale instability in rotating stratified fluids with small scale forced turbulence which we found in \cite{[1]}. These structures are of helical kinks type. The different solutions that we plotted correspond to solutions linking two different stationnary points for different values of the Rayleigh and the Taylor numbers.