The evolution and characteristics of large-scale vortices are critical for understanding
temporal and spatial exchange of mass and momentum. Using a validated depth-averaged …

In a stably stratified shear layer, multiple competing instabilities produce sensitivity to small
changes in initial conditions, popularly called the butterfly effect (as a flapping wing may …

Studies of Kelvin–Helmholtz (KH) instability have typically modelled the initial flow as an
isolated shear layer. In geophysical cases, however, the instability often occurs near …

The velocity perturbations and Reynolds stresses associated with finite-amplitude Holmboe
instabilities are investigated using linear stability analysis, numerical simulations, and …

Initial perturbations are commonly used in direct numerical simulations (DNS) to trigger the
shear instability of stratified fluids. We investigate the effects of initial perturbations on the …

Owls' silent flight is commonly attributed to their special wing morphology combined with
wingbeat kinematics. One of these special morphological features is known as the leading …

This study is a direct follow-up of the paper by Heifetz and Guha [Phys. Rev. E 100, 043105
(2019) 2470-0045 10.1103/PhysRevE. 100.043105] on a minimal nonlinear dynamical …

The Reynolds stress in Holmboe instabilities at moderate Reynolds numbers is investigated
using single wavelength simulations (SWS), multiple wavelength simulations (MWS), and …

Abstract Studies of Kelvin-Helmholtz instability have modelled the initial flow as an isolated
shear layer, without the effects of a no-slip boundary or a neighboring shear layer. However …

Flows in the oceans and the atmosphere often involve the horizontal shearing of stably
stratified density layers. These shear layers are subject to hydrodynamic instabilities that …