Layering, instabilities, and mixing in turbulent stratified flows

CP Caulfield - Annual Review of Fluid Mechanics, 2021 - annualreviews.org
Understanding how turbulence leads to the enhanced irreversible transport of heat and
other scalars such as salt and pollutants in density-stratified fluids is a fundamental and …

On the study of transitional low-Reynolds number flows over airfoils operating at high angles of attack and their prediction using transitional turbulence models

J Wauters, J Degroote - Progress in Aerospace Sciences, 2018 - Elsevier
In this survey paper transitional turbulence modeling is approached from the point of view
relevant to small unmanned aerial vehicles (span≈ 1 m), of which the flow is characterized …

[图书][B] Instability in geophysical flows

WD Smyth, JR Carpenter - 2019 - books.google.com
Instabilities are present in all natural fluids from rivers to atmospheres. This book considers
the physical processes that generate instability. Part I describes the normal mode …

The 'zoo'of secondary instabilities precursory to stratified shear flow transition. Part 1 Shear aligned convection, pairing, and braid instabilities

A Mashayek, WR Peltier - Journal of Fluid Mechanics, 2012 - cambridge.org
We study the competition between various secondary instabilities that co-exist in a
preturbulent stratified parallel flow subject to Kelvin–Helmholtz instability. In particular, we …

Turbulent diapycnal mixing in stratified shear flows: the influence of Prandtl number on mixing efficiency and transition at high Reynolds number

H Salehipour, WR Peltier, A Mashayek - Journal of Fluid Mechanics, 2015 - cambridge.org
Motivated by the importance of small-scale turbulent diapycnal mixing to the closure of the
large-scale meridional overturning circulation (MOC) of the oceans, we focus on a model …

Goldilocks mixing in oceanic shear-induced turbulent overturns

A Mashayek, CP Caulfield, MH Alford - Journal of Fluid Mechanics, 2021 - cambridge.org
We present a new, simple and physically motivated parameterization, based on the ratio of
Thorpe and Ozmidov scales, for the irreversible turbulent flux coefficient. Importantly …

Turbulence in forced stratified shear flows

KM Smith, CP Caulfield, JR Taylor - Journal of Fluid Mechanics, 2021 - cambridge.org
Continuously forced, stratified shear flows occur in many geophysical systems, including
flow over sills, through fjords and at the mouths of rivers and estuaries. These continuously …

Turbulent shear layers in a uniformly stratified background: DNS at high Reynolds number

A VanDine, HT Pham, S Sarkar - Journal of Fluid Mechanics, 2021 - cambridge.org
Turbulent shear layers in a uniformly stratified background: DNS at high Reynolds number
Page 1 J. Fluid Mech. (2021), vol. 916, A42, doi:10.1017/jfm.2021.212 Turbulent shear layers …

The butterfly effect and the transition to turbulence in a stratified shear layer

CL Liu, AK Kaminski, WD Smyth - Journal of Fluid Mechanics, 2022 - cambridge.org
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 …

Stratified shear instability in a field of pre-existing turbulence

AK Kaminski, WD Smyth - Journal of Fluid Mechanics, 2019 - cambridge.org
Turbulent mixing of heat and momentum in the stably-stratified ocean interior occurs in
discrete events driven by vertical variations of the horizontal velocity. Typically, these events …