Evaporation versus imbibition in a porous medium
| Autor: | Benoît Haut, Benjamin Sobac, Laurent Spreutels, Charlotte Van Engeland |
|---|---|
| Přispěvatelé: | Université libre de Bruxelles (ULB), École Polytechnique de Montréal (École Polytechnique de Montréal) |
| Rok vydání: | 2020 |
| Předmět: |
Gravity (chemistry)
Materials science Capillary action Mécanique des fluides Evaporation Gravity Porous media 02 engineering and technology Sciences de l'ingénieur Liquid dynamics 010402 general chemistry 01 natural sciences Physics::Fluid Dynamics Biomaterials Capillary imbibition [CHIM.GENI]Chemical Sciences/Chemical engineering Colloid and Surface Chemistry [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] Dynamics (mechanics) Front (oceanography) Chimie des surfaces et des interfaces Mechanics 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Condensed Matter::Soft Condensed Matter Imbibition 0210 nano-technology Porous medium Dimensionless quantity |
| Zdroj: | Journal of Colloid and Interface Science Journal of Colloid and Interface Science, Elsevier, 2020, 576, pp.280-290. ⟨10.1016/j.jcis.2020.02.105⟩ Journal of colloid and interface science, 576 |
| ISSN: | 0021-9797 1095-7103 |
| DOI: | 10.1016/j.jcis.2020.02.105 |
| Popis: | Predicting and controlling the liquid dynamics in a porous medium is of large importance in numerous technological and industrial situations. We derive here a general analytical solution for the dynamics of a flat liquid front in a porous medium, considering the combined effects of capillary imbibition, gravity and evaporation. We highlight that the dynamics of the liquid front in the porous medium is controlled by two dimensionless numbers: a gravity–capillary number G and an evaporation–capillary number E. We analyze comprehensively the dynamics of the liquid front as functions of G and E, and show that the liquid front can exhibit seven kinds of dynamics classified in three types of behaviors. For each limiting case, a simplified expression of the general solution is also derived. Finally, estimations of G and E are computed to evidence the most common regimes and corresponding liquid front dynamics encountered in usual applied conditions. This is realized by investigating the influence of the liquid and porous medium properties, as well as of the atmospheric conditions, on the values of the dimensionless numbers. SCOPUS: ar.j info:eu-repo/semantics/published |
| Databáze: | OpenAIRE |
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