Stationary Mass Transfer in the Longitudinal Flow Past a Selectively Permeable Flat Wall

摘要

By numerically integrating the inverse Laplace transform, an approximate solution was obtained to the convective diffusion equation for stationary two-dimensional mass transfer on a selectively permeable surface (membrane) past which there is a flow with linear flow velocity distribution at constant suction velocity. The solution was the concentration distributions in the pressure channel, which depend on two coordinates and the membrane selectivity. The adequacy of the assumptions made for reverse osmosis and pregel ultrafiltration in describing the laminar and turbulent flows in plane channels was demonstrated.