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Journal of Porous Media
インパクトファクター: 1.49 5年インパクトファクター: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN 印刷: 1091-028X
ISSN オンライン: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v8.i3.20
pages 259-269

Role of Sorption Isotherms in the Analysis of Coupled Heat and Mass Fluxes in Porous Media

A. Heitor Reis
Department of Physics, University of Évora, Rua Romão Ramalho, 59, 7000-671 Évora, Portugal; and Évora Geophysics Centre, Apartado 94, 7002-554 Évora, Portugal
Rui Rosa
Geophysics Center of Evora and Department of Physics, University of Evora, R. Romao Ramalho, 59, 7000-671 Evora, Portugal

要約

The aim of this work is to show the importance of the sorption isotherms in the study of the heat and mass fluxes in unsaturated porous media. General forms of the heat and mass fluxes are presented in terms of experimentally accessible quantities. The role of the isotherm slope in the coupling of heat and mass fluxes and its influence on the effective permeability are shown. Separate relations for vapor and liquid fluxes through the porous medium are presented as functions of the temperature and the isotherm slopes. Nonstationary isothermal mass flux is also analyzed, a relaxation time for this process is identified, and its relation to the isotherm slope is also discussed.


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