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Stirring the Cahn-Hilliard fluid

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Lunch will be provided after the seminar

Abstract: The Cahn-Hilliard equation describes ‘mixtures that do not mix’, for example oil and water. There is a huge range of situations in which a phase-separating liquid might be stirred. Examples include advection by an externally-imposed shear flow, as in polymer physics; by a chaotic mixing protocol, as in the manufacture of emulsions; or by a self-consistent turbulent velocity field. In this more complicated case, the flow evolution and the phase-separation are coupled. We outline the theory and discuss these examples, and introduce a new study: phase separation in thin films. This particular application highlights the importance of modelling the feedback of concentration gradients into the flow that stirs the mixture.

This talk is part of the BPI Seminar Series series.

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