title: Demonstration of secondary currents in the pressure-driven flow of a concentrated suspension through a square conduit.
abstract: The existence of secondary flows in the pressure-driven flow of a concentrated suspension of noncolloidal particles through a conduit of square cross section under creeping flow conditions is confirmed experimentally. This Letter lends support to the idea that secondary currents, rather than shear-induced migration, may actually be the dominant mechanism that determines particle distribution in noncolloidal suspension flows through nonaxisymmetric geometries. This work also establishes that coextrusion of two concentrated suspensions through nonaxisymmetric geometries with a stable suspension-suspension interface is not possible, except in special situations.
authors: Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada M5S3E5.
authors: Adam
authors: A
authors: Zrehen
authors: Arun
authors: A
authors: Ramachandran
mesh_terms: D044085:Microfluidics; D008956:Models, Chemical; D013535:Suspensions / Q000737:chemistry; D055682:Viscoelastic Substances / Q000737:chemistry*
chemical_list: D013535:Suspensions; D055682:Viscoelastic Substances