Abstract
Experiments have been performed to determine the average mass transfer coefficient between a solution flowing through a pipe and a square plate immersed in the flow. Measurements cover a Reynolds number range of 150 – 2000 based on the length of half the side of the square plate and a Schmidt number range of 800 – 9000. Two methods are used for measuring the average mass transfer coefficient: precipitation of copper on an iron plate, and an electrochemical method involving the cathodic reduction of potassium ferricyanide at the transfer surface. The aim of this paper is to determine the variation of the average mass transfer coefficient as a function of the velocity of the flow and its physical characteristics for different inclinations of the plate with respect to the flow, and to study the influence of the ratio between the pipe diameter and the side of the square plate and the influence of the stability of the entering fluid. Correlation relations between the Sherwood, Reynolds and Schmidt numbers are proposed for the different cases studied.
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