Journal article

Electroviscous effects in low Reynolds number liquid flow through a slit-like microfluidic contraction

Malcolm R Davidson, Dalton JE Harvie

CHEMICAL ENGINEERING SCIENCE | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2007

Abstract

A finite volume numerical method is used to predict electroviscous effects in steady state, pressure-driven liquid flow in a slit-like microfluidic contraction at low Reynolds number. A uniform charge density is assumed on the channel walls and the liquid is taken to be a symmetric 1:1 electrolyte. It is shown that predicted profiles of electrical potential, charge, and velocity across the channel at locations half way along the contraction and outlet sections are almost coincident with their uniform slit counterparts. A simple theory is developed that calculates the pressure drop along the channel by adding the pressure losses in the inlet, contraction and outlet sections (based on the clas..

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