Combined electrokinetic and shear flows control colloidal particle distribution across microchannel cross-sections.

ABSTRACT: Recent experimental observations on combined electrokinetic and shear flows of colloidal suspensions in rectangular cross-section microfluidic channels have shown unusual cross-stream colloidal particle migration and dynamic assembly. Although a new electrophoresis-induced lift force has been postulated to cause the lateral migration of colloidal particles, little is known about how fluid properties and flow conditions impact this force and therefore subsequent colloidal particle migration. Furthermore, no experimental quantification of this electrophoresis-induced lift force is available. We report several key advances by demonstrating that the kinematic viscosity of the fluid can be used to modulate the spatial distribution of particles over the entire microchannel cross-section, with su

SUBMITTER: Lochab V 

PROVIDER: S-EPMC7855569 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature