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On the meaning of mixing efficiency for buoyancy-driven mixing in stratified turbulent flows

Wykes, Megan S.; Hughes, Graham; Dalziel, S


The concept of a mixing efficiency is widely used to relate the amount of irreversible diabatic mixing in a stratified flow to the amount of energy available to support mixing. This common measure of mixing in a flow is based on the change in the background potential energy, which is the minimum gravitational potential energy of the fluid that can be achieved by an adiabatic rearrangement of the instantaneous density field. However, this paper highlights examples of mixing that is primarily...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Journal of Fluid Mechanics
DOI: 10.1017/jfm.2015.462


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