Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation

Unsteady shear methods have the potential to generate flow perturbations near the membrane surface, which play an important role in reducing concentration polarisation and fouling tendency. In general, there are two main approaches for generating time-varying flow perturbations: 1) generating oscill...

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Main Authors:	Liang, Y. Y., Weihs, G. A. Fimbres, Wiley, D. E.
Format:	Article
Language:	English
Published:	Elsevier Ltd 2020
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/26600/ http://umpir.ump.edu.my/id/eprint/26600/ http://umpir.ump.edu.my/id/eprint/26600/ http://umpir.ump.edu.my/id/eprint/26600/1/Comparison%20of%20oscillating%20flow%20and%20slip%20velocity%20mass%20transfer%20.pdf

id	ump-26600
recordtype	eprints
spelling	ump-266002019-12-31T01:50:19Z http://umpir.ump.edu.my/id/eprint/26600/ Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation Liang, Y. Y. Weihs, G. A. Fimbres Wiley, D. E. TP Chemical technology Unsteady shear methods have the potential to generate flow perturbations near the membrane surface, which play an important role in reducing concentration polarisation and fouling tendency. In general, there are two main approaches for generating time-varying flow perturbations: 1) generating oscillations in the bulk flow; or 2) forcing a slip velocity near the membrane surface. This paper presents a detailed comparison study of both approaches by means of two-dimensional computational fluid dynamics (CFD) simulations. The results show that both approaches result in significant increases in flux and maximum wall shear at the same disturbance resonant frequency and Reynolds number. This suggests that the mechanism by which the flow perturbations are generated is not as important as the perturbation frequency, in terms of increasing wall shear and permeate flux. However, it is more important to perturb flow near the membrane surface because it reduces energy consumption compared to oscillating flow approach. In addition, this paper confirms that a white noise perturbation can be used to simplify the approach for maximising vortex-shedding-induced mass transfer enhancement, without the need to identify the peak/resonant frequency for the flow in spacer-filled membrane channels at the expense of a higher pressure loss. Elsevier Ltd 2020-01 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/26600/1/Comparison%20of%20oscillating%20flow%20and%20slip%20velocity%20mass%20transfer%20.pdf Liang, Y. Y. and Weihs, G. A. Fimbres and Wiley, D. E. (2020) Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation. Journal of Membrane Science, 593. pp. 1-9. ISSN 0376-7388 https://doi.org/10.1016/j.memsci.2019.117433 https://doi.org/10.1016/j.memsci.2019.117433
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 Liang, Y. Y. Weihs, G. A. Fimbres Wiley, D. E. Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation
description	Unsteady shear methods have the potential to generate flow perturbations near the membrane surface, which play an important role in reducing concentration polarisation and fouling tendency. In general, there are two main approaches for generating time-varying flow perturbations: 1) generating oscillations in the bulk flow; or 2) forcing a slip velocity near the membrane surface. This paper presents a detailed comparison study of both approaches by means of two-dimensional computational fluid dynamics (CFD) simulations. The results show that both approaches result in significant increases in flux and maximum wall shear at the same disturbance resonant frequency and Reynolds number. This suggests that the mechanism by which the flow perturbations are generated is not as important as the perturbation frequency, in terms of increasing wall shear and permeate flux. However, it is more important to perturb flow near the membrane surface because it reduces energy consumption compared to oscillating flow approach. In addition, this paper confirms that a white noise perturbation can be used to simplify the approach for maximising vortex-shedding-induced mass transfer enhancement, without the need to identify the peak/resonant frequency for the flow in spacer-filled membrane channels at the expense of a higher pressure loss.
format	Article
author	Liang, Y. Y. Weihs, G. A. Fimbres Wiley, D. E.
author_facet	Liang, Y. Y. Weihs, G. A. Fimbres Wiley, D. E.
author_sort	Liang, Y. Y.
title	Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation
title_short	Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation
title_full	Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation
title_fullStr	Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation
title_full_unstemmed	Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation
title_sort	comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: cfd analysis and validation
publisher	Elsevier Ltd
publishDate	2020
url	http://umpir.ump.edu.my/id/eprint/26600/ http://umpir.ump.edu.my/id/eprint/26600/ http://umpir.ump.edu.my/id/eprint/26600/ http://umpir.ump.edu.my/id/eprint/26600/1/Comparison%20of%20oscillating%20flow%20and%20slip%20velocity%20mass%20transfer%20.pdf
first_indexed	2023-09-18T22:41:30Z
last_indexed	2023-09-18T22:41:30Z
_version_	1777416946068750336

Comparison of oscillating flow and slip velocity mass transfer enhancement in spacer-filled membrane channels: CFD analysis and validation

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