Sheared liquids in the nanoscale range

M. Urbakh*, L. Daikhin, J. Klafter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we study two characteristic properties of thin confined liquids under shear: the induced velocity profile in the liquid at low shear rates, and the shear-dependent thinning of the effective viscosity. Our approach is based on the coupling between a time-dependent Ginzburg-Landau equation for a local order parameter and a local velocity field. Special attention is given to the role of the lateral nonuniformity of the liquid-wall interactions in determining these properties. We derive the Brinkman equation for the velocity profile and obtain a power low dependence of the viscosity on shear rate in the thinning regime, ηeff∼γ-a with 2/3≤α≤1.

Original languageEnglish
Pages (from-to)10707-10713
Number of pages7
JournalThe Journal of Chemical Physics
Volume103
Issue number24
DOIs
StatePublished - 1995

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