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Gas/Liquid Two‐phase Flow in a Flat Sheet Filtration Module: Measurement of Local Wall Shear Stresses
Author(s) -
Ducom Gaëlle,
Puech FrançoisPierre,
Cabassud Corinne
Publication year - 2003
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450810358
Subject(s) - shear stress , materials science , filtration (mathematics) , air sparging , mechanics , cross flow filtration , shear (geology) , two phase flow , sparging , flux (metallurgy) , flow (mathematics) , membrane , composite material , chemistry , metallurgy , ecology , biochemistry , statistics , biology , physics , mathematics , contamination , environmental remediation
Air sparging in membrane filtration consists in generating an intermittent gas/liquid flow by injecting air in the concentrate compartment together with the feed. This process is very efficient for flux enhancement for different membrane processes. In order to understand the influence of wall shear stresses generated by the two‐phase flow on the flux enhancement, this work aimed to characterize local wall shear stresses generated by the two‐phase flow during filtration operated at a low permeate flux. Local wall shear stresses were measured using an electrochemical method in different points of a flat sheet nanofiltration module and for several operating conditions.