Rheology-modulated contact line dynamics of an immiscible binary system under electrical double layer phenomena.

Mondal, Pranab Kumar; DasGupta, Debabrata; Chakraborty, Suman · Soft Matter · 2015

basic_science · Level V

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Abstract

We investigate the electrically driven contact line dynamics of a binary fluid system constituted by one Newtonian and another non-Newtonian fluid in a narrow fluidic channel with chemically patched walls. We use a power-law model to describe the rheology of the non-Newtonian fluid and a diffuse interface phase-field method to model the dynamics of multiple phases. We bring out the alteration in the interfacial dynamics as attributable to the rheology-driven modifications in the interfacial stress and its interplay with the Maxwell stress originating from electrokinetic effects.