Stuck in the mud? Channelling, clogging and burrowing in plastic fluids

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• Duncan R Hewitt, University of Cambridge
• Friday 20 October 2023, 16:00-17:00
• MR2.

If you have a question about this talk, please contact Hatice Balci.

Numerous natural and industrial materials, ranging from lava, mud and waste slurries to foodstuffs, blood and mucus, exhibit both fluid-like and solid-like behaviour: they can flow like a viscous fluid under sufficient force, but withstand deformation at lower stresses. Clogging and flow localisation in such materials is a generic, and often somewhat serious, feature of their mechanics. This talk will explore some basic fluid mechanical behaviour of idealised viscoplastic materials under confined or obstructed conditions, revealing details of how clogging and channelling are manifest in different settings. Mechanisms for locomotion through such a material by means of burrowing will also be briefly discussed. The focus is to uncover fundamental behaviour of these materials using theoretical, numerical and experimental means. Some physical implications will be discussed.

This talk is part of the Fluid Mechanics (DAMTP) series.

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