3D CFD study of hydrodynamics and mass transfer phenomena for spiral wound membrane submerged-type feed spacer with different node geometries and sizes

Chong, Y. K. and Liang, Y. Y. and Lau, W. J. and Fimbres Weihs, G. A. (2022) 3D CFD study of hydrodynamics and mass transfer phenomena for spiral wound membrane submerged-type feed spacer with different node geometries and sizes. International Journal of Heat and Mass Transfer, 191 (122819). pp. 1-10. ISSN 0017-9310. (Published)

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Abstract

Modification of the spacer geometry is a promising approach to increase the efficiency of reverse osmosis (RO) spiral wound membrane modules. Column nodes and spherical nodes are considered in this three-dimensional computational fluid dynamic (CFD) study to evaluate the hydrodynamic and mass transfer performance of submerged spacers with different node geometries and sizes. Small-scale CFD analysis results reveal that the column node has better mass transfer performance than the spherical node geometry because column nodes divert more flow to the filaments, leading to higher local velocity at the region between the filament and wall. Furthermore, when the dimensionless node diameter ratio of the column nodes increases from 0.3 to 1.2, Sherwood number and wall shear increase by 25% and 8% respectively at the expense of higher global friction factor (44%). A sea water RO full-scale analysis revealed that column node spacers yield higher average flux than spherical nodes and conventional spacers at high feed inlet velocity (> 0.1 m/s), because the mixing effects by the spacer that improve mass transfer are more prominent.

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Desalination; Spiral wound membrane; Modeling; CFD
Subjects:	Q Science > QD Chemistry T Technology > TP Chemical technology
Faculty/Division:	Centre of Excellence: Centre of Excellence for Advanced Research in Fluid Flow Institute of Postgraduate Studies College of Engineering
Depositing User:	Mrs Norsaini Abdul Samat
Date Deposited:	08 Jul 2022 01:28
Last Modified:	08 Jul 2022 01:28
URI:	http://umpir.ump.edu.my/id/eprint/34680
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