Analysis of transient laminar mass transfer in a parallel-plate dialyser


Kolev, Spas D. and Linden, Willem E. van der (1992) Analysis of transient laminar mass transfer in a parallel-plate dialyser. Analytica Chimica Acta, 257 (2). pp. 331-342. ISSN 0003-2670

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Abstract:Mass transfer under laminar flow conditions is discussed on the basis of the Navier-Stokes equations and the axially dispersed plug-flow model. By fitting the results with these two approaches, relationships can be derived for predicting the mass-transfer coefficient and the Peclet number in a parallel-plate laminar flow system with on impermeable wall and an opposite wall at which the concentration is uniform. This single-stream relationship can be utilized for calculating the mass-transfer coefficients in both channels of a co-current parallel-plate dialyser. It is shown that the Peclet number in the axially dispersed plug-flow model derived for a parallel-plate flow where both sides are impermeable gives better results when applied to the co-current dialyser than the single-stream relationship. The results obtained allow the mathematical modelling of process and analytical flow-through manifolds incorporating a dialysis module.
Item Type:Article
Copyright:© 1992 Elsevier Science
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