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Journal Articles Journal of Applied Electrochemistry Year : 1991

Mass transfer enhancement by suspensions in a shear flow

Abstract

Electrochemical measurement of mass transfer enhancement in a dilute suspension of particles, due to particle rotation in the presence of a shear flow, has been studied with a Couette cell. An effective diffusivityDe involving the Peclet numberPe of the particles and the molecular diffusivityD of the solute was obtained for low particle volume fraction ϕ asDe=D(1+3.5ϕPe1/2). From steady-state and transient data, it was shown that aggregation may occur with alumina particles and that inertial effects due to centrifugation reveal a marginal layer free of particles near the rotating inner cylinder.

Dates and versions

hal-04557756 , version 1 (24-04-2024)

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Claude Deslouis, A. Ezzidi, Bernard Tribollet. Mass transfer enhancement by suspensions in a shear flow. Journal of Applied Electrochemistry, 1991, 21 (12), pp.1081-1086. ⟨10.1007/BF01041451⟩. ⟨hal-04557756⟩
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