caa a22 4500 463163060 CHVBK 20180406164753.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s11242-006-0025-9 doi (NATIONALLICENCE)springer-10.1007/s11242-006-0025-9 Convective mass transfer across fluid interfaces in straight angular pores [Elektronische Daten] [Weishu Zhao, Marios Ioannidis] Steady convective mass transfer to or from fluid interfaces in pores of angular cross-section is theoretically investigated. This situation is relevant to a variety of mass transport process in porous media, including the fate of residual non-aqueous phase liquid ganglia and gas bubbles. The model incorporates the essential physics of capillarity and solute mass transfer by convection and diffusion in corner fluid filaments. The geometry of the corner filaments, characterized by the fluid-fluid contact angle, the corner half-angle and the interface meniscus curvature, is accounted for. Boundary conditions of zero surface shear (‘perfect-slip') and infinite surface shear (‘no-slip') at the fluid-fluid interface are considered. The governing equations for laminar flow within the corner filament and convective diffusion to or from the fluid-fluid interface are solved using finite-element methods. Flow computations are verified by comparing the dimensionless resistance factor and hydraulic conductance of corner filaments against recent numerical solutions by Patzek and Kristensen (J. Colloid Interface Sci 236, 305-317 2001). Novel results are obtained for the average effluent concentration as a function of flow geometry and pore-scale Peclet number. These results are correlated to a characteristic corner length and local pore-scale Peclet number using empirical equations appropriate for implementation in pore network models. Finally, a previously published "2D-slit” approximation to the problem at hand is checked and found to be in considerable error. Springer Science+Business Media B.V., 2007 Mass transfer nationallicence Meniscus nationallicence Interface nationallicence Convection nationallicence Diffusion nationallicence Pore network nationallicence Zhao Weishu Department of Chemical Engineering, University of Waterloo, N2L 3G1, Waterloo, Ontario, Canada aut Ioannidis Marios Department of Chemical Engineering, University of Waterloo, N2L 3G1, Waterloo, Ontario, Canada aut Transport in Porous Media Kluwer Academic Publishers 66/3(2007-02-01), 495-509 0169-3913 66:3<495 2007 66 11242 https://doi.org/10.1007/s11242-006-0025-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11242-006-0025-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhao Weishu Department of Chemical Engineering, University of Waterloo, N2L 3G1, Waterloo, Ontario, Canada aut NATIONALLICENCE 700 1- Ioannidis Marios Department of Chemical Engineering, University of Waterloo, N2L 3G1, Waterloo, Ontario, Canada aut NATIONALLICENCE 773 0- Transport in Porous Media Kluwer Academic Publishers 66/3(2007-02-01), 495-509 0169-3913 66:3<495 2007 66 11242 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer