Predicting optimal back-shock times in ultrafiltration hollow fibre modules through path-lines

Research output: Research - peer-reviewJournal article – Annual report year: 2014

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This paper presents a two dimensional mathematical model of back-shocking in ultrafiltration. The model investigates the effect of back-shocking on concentration polarization. The model shows a positive effect on both the volumetric flux and the observed rejection when back-shocking is applied as compared to the steady-state solution. Furthermore, the effect of changing different parameters such as inlet velocity, forward and backwards pressure on the back-shock time, the increase in volumetric flux and observed rejection, is presented. Moreover, two analytical estimates for the optimal back-shock time derived from calculating the path-lines during a back-shock cycle are presented. Both of these expressions are in good agreement with the results obtained from the mathematical model and data collected from the literature. Based on this, a simple expression for an optimal back-shock time in a multi-parameter problem is provided.
Original languageEnglish
JournalJournal of Membrane Science
Volume470
Pages (from-to)275-293
ISSN0376-7388
DOIs
StatePublished - 2014
CitationsWeb of Science® Times Cited: 3

    Research areas

  • Back-shocking, Membrane separation, CFD, Mathematical modelling, Ultrafiltration
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