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arXiv · 2003.01956

The contribution of Brownian motion to the stress in a colloidal suspension

Duraivelan Palanisamy·Wouter K. den Otter
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Abstract

The deviatoric stresses of colloidal suspensions are routinely calculated using the expression introduced by Batchelor [J. Fluid Mech. 83, 97--117 (1977)]. We show by example that the central feature in its derivation, the thermodynamic force driving particles down the density gradient, is inconsistent with the motion of the colloids. A new expression for the stress is proposed.

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Duraivelan Palanisamy, Wouter K. den Otter. 2020-03-04. The contribution of Brownian motion to the stress in a colloidal suspension. https://arxiv.org/abs/2003.01956

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