TY - JOUR
T1 - Modeling concentration polarization in crossflow microfiltration of oil-in-water emulsion using shear-induced diffusion; CFD and experimental studies
AU - Asadi Tashvigh, Akbar
AU - Fouladitajar, Amir
AU - Zokaee Ashtiani, Farzin
PY - 2015/2/2
Y1 - 2015/2/2
N2 - Membrane filtration has become firmly established as a primary technology for ensuring treatment of oily wastewater. A detailed study on concentration polarization (CP) during microfiltration (MF) of oil-in-water emulsions was carried out in order to predict permeate flux decline. A two dimensional computational fluid dynamics (CFD) modeling was conducted using the finite difference method. A combination of molecular and shear-induced diffusion coefficient was employed to describe back-diffusion of oil droplets from the membrane wall toward the bulk. Evaluation of the proposed approach was carried out by comparing the results to the experimental data in which good agreement was observed almost in every operating condition. The effects of oil concentration, trans-membrane pressure (TMP), and cross-flow velocity (CFV) on the model precision were also studied. Finally, the growth rate of CP layer along the membrane length was predicted in different operating conditions, in which the obtained trend was found to be in agreement with the CP theory.
AB - Membrane filtration has become firmly established as a primary technology for ensuring treatment of oily wastewater. A detailed study on concentration polarization (CP) during microfiltration (MF) of oil-in-water emulsions was carried out in order to predict permeate flux decline. A two dimensional computational fluid dynamics (CFD) modeling was conducted using the finite difference method. A combination of molecular and shear-induced diffusion coefficient was employed to describe back-diffusion of oil droplets from the membrane wall toward the bulk. Evaluation of the proposed approach was carried out by comparing the results to the experimental data in which good agreement was observed almost in every operating condition. The effects of oil concentration, trans-membrane pressure (TMP), and cross-flow velocity (CFV) on the model precision were also studied. Finally, the growth rate of CP layer along the membrane length was predicted in different operating conditions, in which the obtained trend was found to be in agreement with the CP theory.
KW - CFD modeling
KW - Concentration polarization
KW - Microfiltration
KW - Oil-in-water emulsion
KW - Shear-induced diffusion
UR - http://www.scopus.com/inward/record.url?scp=84918787430&partnerID=8YFLogxK
U2 - 10.1016/j.desal.2014.12.001
DO - 10.1016/j.desal.2014.12.001
M3 - Article
AN - SCOPUS:84918787430
SN - 0011-9164
VL - 357
SP - 225
EP - 232
JO - Desalination
JF - Desalination
ER -