CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity

Recent studies have shown that the interactions between forced transient flow and eddy inducers (i.e. spacers) in spiral wound membrane modules results in significant mass transfer enhancement and reduction in concentration polarisation (CP). This paper uses CFD to investigate the effect of varying...

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Main Authors:	Foo, K., Liang, Y. Y., Weihs, G. A. Fimbres
Format:	Article
Language:	English
Published:	Elsevier Ltd 2019
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/27167/ http://umpir.ump.edu.my/id/eprint/27167/ http://umpir.ump.edu.my/id/eprint/27167/ http://umpir.ump.edu.my/id/eprint/27167/1/CFD%20study%20of%20the%20effect%20of%20SWM%20feed%20spacer%20geometry.pdf

id	ump-27167
recordtype	eprints
spelling	ump-271672020-02-03T02:18:05Z http://umpir.ump.edu.my/id/eprint/27167/ CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity Foo, K. Liang, Y. Y. Weihs, G. A. Fimbres TP Chemical technology Recent studies have shown that the interactions between forced transient flow and eddy inducers (i.e. spacers) in spiral wound membrane modules results in significant mass transfer enhancement and reduction in concentration polarisation (CP). This paper uses CFD to investigate the effect of varying the spacer geometric parameters on the resonant frequency for an unsteady forced-slip, as well as the resulting permeate flux enhancement, for a 2D zig-zag spacer. The analysis shows that the resonant frequency is significantly affected by the interaction of the shear layer with successive downstream spacers. The effectiveness of forced-slip reaches a peak (up to 15.6% flux increase) for a spacer size in the range of 0.5<df/hch<0.6 because of the trade-off between mixing-induced forced-slip and the CP modulus. In addition, vortex shedding is suppressed for smaller spacer sizes (df/hch≤0.4), because viscous forces dominate over convective forces due to a smaller filament Reynolds number. As the distance between filaments is increased, the increase in flux due to forced-slip is greater (up to 31.5%), albeit the actual flux decreases because the boundary layer is more developed. These results also reinforce the finding that forced-slip is more efficient for spacer designs with poor mixing (i.e. high CP). Elsevier Ltd 2019 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/27167/1/CFD%20study%20of%20the%20effect%20of%20SWM%20feed%20spacer%20geometry.pdf Foo, K. and Liang, Y. Y. and Weihs, G. A. Fimbres (2019) CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity. Journal of Membrane Science. pp. 1-13. ISSN 0376-7388 (In Press) https://doi.org/10.1016/j.memsci.2019.117643 https://doi.org/10.1016/j.memsci.2019.117643
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Foo, K. Liang, Y. Y. Weihs, G. A. Fimbres CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity
description	Recent studies have shown that the interactions between forced transient flow and eddy inducers (i.e. spacers) in spiral wound membrane modules results in significant mass transfer enhancement and reduction in concentration polarisation (CP). This paper uses CFD to investigate the effect of varying the spacer geometric parameters on the resonant frequency for an unsteady forced-slip, as well as the resulting permeate flux enhancement, for a 2D zig-zag spacer. The analysis shows that the resonant frequency is significantly affected by the interaction of the shear layer with successive downstream spacers. The effectiveness of forced-slip reaches a peak (up to 15.6% flux increase) for a spacer size in the range of 0.5<df/hch<0.6 because of the trade-off between mixing-induced forced-slip and the CP modulus. In addition, vortex shedding is suppressed for smaller spacer sizes (df/hch≤0.4), because viscous forces dominate over convective forces due to a smaller filament Reynolds number. As the distance between filaments is increased, the increase in flux due to forced-slip is greater (up to 31.5%), albeit the actual flux decreases because the boundary layer is more developed. These results also reinforce the finding that forced-slip is more efficient for spacer designs with poor mixing (i.e. high CP).
format	Article
author	Foo, K. Liang, Y. Y. Weihs, G. A. Fimbres
author_facet	Foo, K. Liang, Y. Y. Weihs, G. A. Fimbres
author_sort	Foo, K.
title	CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity
title_short	CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity
title_full	CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity
title_fullStr	CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity
title_full_unstemmed	CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity
title_sort	cfd study of the effect of swm feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity
publisher	Elsevier Ltd
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/27167/ http://umpir.ump.edu.my/id/eprint/27167/ http://umpir.ump.edu.my/id/eprint/27167/ http://umpir.ump.edu.my/id/eprint/27167/1/CFD%20study%20of%20the%20effect%20of%20SWM%20feed%20spacer%20geometry.pdf
first_indexed	2023-09-18T22:42:37Z
last_indexed	2023-09-18T22:42:37Z
_version_	1777417015565221888

CFD study of the effect of SWM feed spacer geometry on mass transfer enhancement driven by forced transient slip velocity

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