Andrew Lawrie & Stuart Dalziel G. K. Batchelor Laboratory,

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Presentation transcript:

On the universality of dissipation mechanisms in variable density mixing Andrew Lawrie & Stuart Dalziel G. K. Batchelor Laboratory, Department of Applied Mathematics and Theoretical Physics, University of Cambridge, UK

Energy Decomposition Original stratification Background stratification Winters et al. (1995) Original stratification Background stratification Admissible pathways

Machinery Admissible pathways Energy fluxes Mixing efficiencies Instantaneous Cumulative Aggregate Admissible pathways Energy fluxes Mixing efficiencies

Double linear initial stratification

Experimental setup

Maximum Mixing Efficiency Classic homogenous layer profile Odd symmetric monatonic profile Doubly stratified density profile

System bulk behaviour …

Start and end state stratifications 49.0% 50.0% 75.0%

Numerical Results Stratified energies and energy fluxes Mixing efficiencies, homogenous energy fluxes