TY - JOUR
T1 - Understanding the influence of hydraulic conditions on colloidal fouling development by using the micro-patterned nanofiltration membrane
T2 - Experiments and numerical simulation
AU - Shang, Wentao
AU - Yang, Songwen
AU - Liu, Wenjie
AU - Wong, Pak Wai
AU - Wang, Rui
AU - Li, Xiaoyan
AU - Sheng, Guoping
AU - Lau, Woonming
AU - An, Alicia Kyoungjin
AU - Sun, Feiyun
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/7/15
Y1 - 2022/7/15
N2 - Surface patterning has emerged as a promising method to control membrane fouling by disturbing the flow field on the membrane surface. In this study, fouling development was non-destructively characterized by optical coherence tomography (OCT), while the micro hydraulic conditions and particle migration trajectories were investigated by using Computational Fluid Dynamics (CFD). Preliminary results demonstrated remarkable anti-fouling performance of the MNF membrane, and CFD simulation revealed that the local flow velocity on the apex area of patterns was greatly accelerated and the vortex among the valley regions was continuously generated. These hydraulic characteristics resulted in the enhancement of the hydrodynamic lift force (fL) and decrease of the permeation drag (fD) enforced on the retained foulants by the MNF membrane. Moreover, particle trajectories simulation integrated with comprehensive forces allowed to understand the influence mechanism of the flow field around MNF membrane surface on particle deposition. This study presents a new understanding of the anti-fouling mechanism of the MNF membranes and provides new insights into the design of self-cleaning membranes.
AB - Surface patterning has emerged as a promising method to control membrane fouling by disturbing the flow field on the membrane surface. In this study, fouling development was non-destructively characterized by optical coherence tomography (OCT), while the micro hydraulic conditions and particle migration trajectories were investigated by using Computational Fluid Dynamics (CFD). Preliminary results demonstrated remarkable anti-fouling performance of the MNF membrane, and CFD simulation revealed that the local flow velocity on the apex area of patterns was greatly accelerated and the vortex among the valley regions was continuously generated. These hydraulic characteristics resulted in the enhancement of the hydrodynamic lift force (fL) and decrease of the permeation drag (fD) enforced on the retained foulants by the MNF membrane. Moreover, particle trajectories simulation integrated with comprehensive forces allowed to understand the influence mechanism of the flow field around MNF membrane surface on particle deposition. This study presents a new understanding of the anti-fouling mechanism of the MNF membranes and provides new insights into the design of self-cleaning membranes.
KW - Anti-fouling
KW - Computational fluid dynamics simulation
KW - Hydraulic conditions
KW - Micro-patterned nanofiltration membranes
UR - https://www.webofscience.com/wos/woscc/full-record/WOS:000797883200004
UR - https://openalex.org/W4223568925
UR - https://www.scopus.com/pages/publications/85128538243
U2 - 10.1016/j.memsci.2022.120559
DO - 10.1016/j.memsci.2022.120559
M3 - Journal Article
SN - 0376-7388
VL - 654
JO - Journal of Membrane Science
JF - Journal of Membrane Science
M1 - 120559
ER -