6 papers · 1 filter
Early onset of secondary shear instability in Kelvin-Helmholtz braids at high Reynolds number
Emma R. Bouckley, Sam F. Lewin, Adrien Lefauve
We study the onset of two-dimensional secondary shear instability (SSI) in the braid regions connecting primary Kelvin-Helmholtz billows in stratified shear flows. While strain ind…
Transition to the ultimate regime of turbulent convection in stratified inclined duct flow
Rundong Zhou, Adrien Lefauve, Roberto Verzicco +1
The stratified inclined duct (SID) flow provides a canonical model for sustained, buoyancy-driven exchange between two reservoirs of different density, and emerges as a new paradig…
Routes to stratified turbulence and temporal intermittency revealed by a cluster-based network model of experimental data
Adrien Lefauve, Yui Hin Marvil Cheung, Xianyang Jiang +1
Modelling fluid turbulence using a `skeleton' of coherent structures has traditionally progressed by focusing on a few canonical laboratory experiments such as pipe flow and Taylor…
The effects of spanwise confinement on stratified shear instabilities
Yves-Marie Ducimetière, François Gallaire, Adrien Lefauve +1
We consider the influence of transverse confinement on the instability properties of velocity and density distributions reminiscent of those pertaining to exchange flows in stratif…
Reynolds stresses in Holmboe instabilities: from linear growth to saturation
Adam J. K. Yang, E. W. Tedford, J. Olsthoorn +2
The Reynolds stress in Holmboe instabilities at moderate Reynolds numbers is investigated using single wavelength simulations (SWS), multiple wavelength simulations (MWS), and labo…
A versatile scanning method for volumetric measurements of velocity and density fields
J. L. Partridge, A. Lefauve, Stuart B. Dalziel
Understanding turbulence in a stratified environment requires a detailed picture of both the velocity field and the density field. Experimentally, this represents a significant mea…