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Maximal mixing efficiency

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If you have a question about this talk, please contact Dr C. P. Caulfield.

The mixing of density stratified flows is normally a relatively inefficient process. If you stir a stably stratified fluid then the vast majority of your work will be dissipated: if you are lucky, maybe 25% of the energy you input will actually go into mixing, but normally it is much less. Is this the best we can do? Why is the figure so low? We shall explore these questions by looking instead at situations where the fluid is unstably stratified. In particular, we explore the mixing efficiency of Rayleigh-Taylor instability and use the results to gain a better understanding of the stably stratified situation.

This talk is part of the Institute for Energy and Environmental Flows (IEEF) series.

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