Flow and mass transfer modelling of nanofiltration

Abstract A numerical model based on the finite volume formulation to predict laminar flows hydrodynamics and mass transfer of aqueous solutions (570 Sc 200 mm ×30 mm ×2  mm) that simulates the two-dimensional developing flow in the channels of spiral-wound modules. The predictions are validated against experimental data of apparent rejection coefficients and permeate fluxes, exhibiting an excellent agreement. A correlation for the concentration boundary layer thickness, a measure of the concentration polarisation, based on the predicted values of the solute concentration profiles, δ ω h =15.5 l h 0.4 Re −0.4 Sc −0.63 Re p −0.04 [1−186Sc −1.0 Re p −0.21 ] is proposed in the operating condition ranges of 250 Re Re p Sc

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