From micro-scale to macro-scale modeling of solute transport in drying capillary porous media
| Autor: | Abdolreza Kharaghani, Faeez Ahmad, Marc Prat, Evangelos Tsotsas, Arman Rahimi |
|---|---|
| Přispěvatelé: | Otto-von-Guericke-Universität Magdeburg, Institut de mécanique des fluides de Toulouse (IMFT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Otto Von Guericke Universität Magdeburg - OVGU (GERMANY), Institut de Mécanique des Fluides de Toulouse - IMFT (Toulouse, France) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Capillary action Mechanical Engineering Mécanique des fluides Monte Carlo method Solute transport 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Isothermal process 010305 fluids & plasmas Macroscopic scale 0103 physical sciences Pore network modeling Cluster (physics) [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] 0210 nano-technology Saturation (chemistry) Porous medium Continuum Modeling Continuum modeling Drying |
| Zdroj: | International Journal of Heat and Mass Transfer International Journal of Heat and Mass Transfer, Elsevier, 2021, 165 (Part B), pp.120722. ⟨10.1016/j.ijheatmasstransfer.2020.120722⟩ |
| ISSN: | 0017-9310 |
| Popis: | International audience; Drying of capillary porous media initially saturated with saline water is central to many engineering and environmental applications. In order to predict the evolution of solute concentration in a porous medium, the macroscopic continuum models (CMs) are commonly employed. However, the predictive aptitudes of the CMs have been questioned. In this work, we solve the classical advection-diffusion equation for so- lute transport in an isothermally drying capillary porous medium for the limiting condition of capillary- dominated regime. The solution of the continuum model is compared with pore network simulations. The results of both models are analyzed in terms of local solute concentration profiles for different val- ues of network saturation. On this basis, the ability of the continuum model to reciprocate the pore network results is assessed. The degree of heterogeneity in the liquid phase structure is characterized by performing pore network Monte Carlo simulations distinguishing the percolating liquid cluster from the non-percolating isolated clusters. Based on the statistical analysis of Monte Carlo simulations, the prob- ability of first solid crystals to appear in the respective liquid phase elements is discussed. We observe that solute enrichment is more pronounced in the isolated single liquid throats and isolated clusters due to lack or significant hindrance to back-diffusion as a result of discontinuity in the liquid phase. |
| Databáze: | OpenAIRE |
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