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Yield stress liquids

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

Many fluids in industry and nature are non-Newtonian and many show a yield stress, viz. they behave as viscoelastic solids below some critical stress or range of stresses. The prototypical yield stress liquid is an aggregated network of colloidal particles – a colloidal gel. I will use results from various sources to illustrate what is and, more interestingly perhaps, what is not known about the yield process in such fluids, with an emphasis on outstanding problems and challenges, of which there are quite a few.

This talk is part of the BPI Seminar Series series.

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