Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 370735
Title Extending potential flow modelling of flat-sheet geometries as applied in membrane-based systems
Author(s) Dirkse, M.H.; Loon, W.K.P. van; Stigter, J.D.; Post, J.W.; Veerman, J.; Bot, G.P.A.
Source Journal of Membrane Science 325 (2008)2. - ISSN 0376-7388 - p. 537 - 545.
Department(s) Systems and Control Group
Sub-department of Environmental Technology
Publication type Refereed Article in a scientific journal
Publication year 2008
Keyword(s) reverse electrodialysis - mass-transport - power - energy
Abstract Abstract The efficiency of chemical reactors can be analysed using the residence time distribution. This research focusses on flat-sheet geometries applied in membrane-based systems. The residence time distribution depends mainly on the 2D velocity field, parallel to the membrane. The velocity average over the transversal direction is calculated using potential flow theory. A combination of real and virtual sources and sinks are used to model the internal inlets and outlets. Furthermore, a novel method is presented to calculate the residence time distribution. By ignoring diffusion and dispersion, every streamline is modelled to have a fixed residence time, which can be calculated with a simple quadrature based on a coordinate transformation. The model predicts the impact of the two-dimensional geometry on the residence time distribution, but it is demonstrated that large zones of nearly stagnant flow have only a limited impact on the residence time distribution. The new model can predict the travelling time from the inlet to each interior location, providing a better tool to analyse spatially distributed chemical reactions. The models agreed highly with pressure measurements (R2 = 0.94¿0.98) and they agreed well with tracer experiments for the residence time (R2 = 0.73¿0.99).
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