Comparison of flow structures in spacer-filled flat and annular channels

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DOIResolve DOI: http://doi.org/10.1016/j.desal.2006.03.003
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TypeArticle
Journal titleDesalination
Volume191
Issue1-3
Pages236244; # of pages: 9
SubjectMembrane spacers; CFD; Flat channel; Annular channel
AbstractSpacers are designed to create directional changes in the flow through membrane modules. Such secondary flow structures reduce concentration polarization and membrane fouling. Obviously, type of the spacer used in membrane modules strongly influences the resulting flow and therefore performance of the module. In this work, we have modeled detailed fluid dynamics of spacer filled channels by using the ‘unit cell’ approach. The validated computational fluid dynamics (CFD) model was used to evaluate performance of certain spacer shapes and compare the resulting fluid dynamics in flat and curved channels. The simulations show that fluid flow behavior in a spacerfilled flat and a spiral channel was not significantly different. This means that pressure drops and mass transfer coefficients measured in flat channels may provide adequate guidelines, which would also be valid for spiralwound modules. The results presented in this work will have significant implications for identifying improved spacers with higher propensities to reduce fouling in membrane modules.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedNo
NRC number47858
NPARC number12339350
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Record identifier41994c16-6685-47d3-b470-8e29b73d5a55
Record created2009-09-11
Record modified2016-05-09
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