Kang, Peter K. Lee, Woonghee Lee, Seockheon Kim, Albert S. 2024-01-20T00:03:39Z 2024-01-20T00:03:39Z 2021-09-03 2017-11-01 0011-9164 https://pubs.kist.re.kr/handle/201004/122081 Structural parameter is a representative quantity of a porous medium, often used to explain mass transfer rate in membrane processes. Intrinsic structural.parameter is defined using characteristic constants of a porous medium, and effective structural parameter is indirectly obtained by analyzing measured fluxes, especially in osmosis driven processes. Although the two parameters are fundamentally equivalent, recent experimental studies show noticeable discrepancies between them. To resolve the inconsistency, we hypothesize that the fraction of effective membrane surface area should include interfacial porosity between the active layer and the porous substrate. To test our hypothesis, we develop a new pore-scale CFD (computational fluid dynamics) solver for both mass and momentum transfer in transient forward osmosis phenomena. Two pre-existing solvers of OpenFOAM, an open-source computational fluid dynamics software package, are combined to seamlessly link the coupled transport phenomena across the active layer, the support layer, and the crossflow zone. We defined a new structural parameter using the simulated flux and the interfacial porosity, first addressed in this study, and obtained an excellent agreement between our CFD results and published experimental data in the literature. English ELSEVIER INTERNAL CONCENTRATION POLARIZATION THERMOPHYSICAL PROPERTIES MEMBRANE-STRUCTURE FLUX BEHAVIOR PERFORMANCE TRANSPORT COMPOSITE WATER DESALINATION SIMULATIONS Origin of structural parameter inconsistency in forward osmosis models: A pore-scale CFD study Article 10.1016/j.desal.2017.05.018 1 DESALINATION, v.421, pp.47 - 60 DESALINATION 421 47 60 scie scopus 000412608700007 2-s2.0-85019613107 Engineering, Chemical Water Resources Engineering Water Resources Article INTERNAL CONCENTRATION POLARIZATION THERMOPHYSICAL PROPERTIES MEMBRANE-STRUCTURE FLUX BEHAVIOR PERFORMANCE TRANSPORT COMPOSITE WATER DESALINATION SIMULATIONS Forward osmosis Internal concentration polarization Structural parameter Interfacial porosity Pore-scale CFD simulation