Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.5085140
Title: A theoretical study of permeability enhancement for ultrafiltration ceramic membranes with conical pores and slippage
Authors: Tran-Duc T. 
Phan-Thien N. 
Wang J. 
Issue Date: 1-Feb-2019
Publisher: American Institute of Physics Inc.
Citation: Tran-Duc T., Phan-Thien N., Wang J. (2019-02-01). A theoretical study of permeability enhancement for ultrafiltration ceramic membranes with conical pores and slippage. Physics of Fluids 31 (2) : 22003. ScholarBank@NUS Repository. https://doi.org/10.1063/1.5085140
Abstract: Ceramic membranes are currently favourable in membrane filtration applications due to their excellent mechanical strength, thermal and chemical resistance, backflush capability, and thus a long-service cycle. Coated on top of a mesoporous support, the selective top layer of ultrafiltration ceramic membranes has pore size not exceeding a few tens of nanometers and thickness in the order of O10 μm. In fact, the permeability of an ultrafiltration ceramic membrane can be estimated by the permeability of the top layer due to its smallest pore size. Without impairing the filtration function but still improving the permeability, a gradient conical pore shape is proposed. Two formulae for the filtrate flow rate versus pressure drop relationship through a conical pore exhibiting surface slippage are established here by extending the Hagen-Poiseuille law and an analytical solution for the axisymmetric creeping flow. It is analytically proved that the surface slip length in a conical flow is proportional to a local pore radius by a slip coefficient that is unique for a given pore configuration at a prescribed flow rate. The permeability of a conical-pore membrane is enhanced for radius ratio not exceeding 6.5. The optimum configuration, achieved at a ratio of 2.3, produces an enhancement factor for a membrane permeability of 1.5 for a no-slip surface; this enhancement increases linearly with the slip coefficient if a surface slippage exists. © 2019 Author(s).
Source Title: Physics of Fluids
URI: https://scholarbank.nus.edu.sg/handle/10635/183637
ISSN: 10706631
DOI: 10.1063/1.5085140
Appears in Collections:Elements
Staff Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Thien Tran-Duc_A Theoretical Study of Permeability Enhancment_Physics.pdf2.31 MBAdobe PDF

OPEN

Pre-printView/Download

SCOPUSTM   
Citations

3
checked on Mar 6, 2021

Page view(s)

40
checked on Mar 4, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.