The contribution of Brownian motion to the stress in a colloidal suspension
arXiv (Cornell University)(2020)
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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Key words
brownian motion
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