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A pore network study of evaporation from the surface of a drying non-hygroscopic porous medium

Moghaddam, Alireza Attari and Kharaghani, Abdolreza and Tsotsas, Evangelos and Prat, Marc A pore network study of evaporation from the surface of a drying non-hygroscopic porous medium. (2018) AIChE Journal, 64 (4). 1435-1447. ISSN 0001-1541

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Official URL: https://doi.org/10.1002/aic.16004

Abstract

The phenomena occurring at the surface of a porous medium during drying in the capillary regime are investigated by pore network simulations. The impact of the formation of wet and dry patches at the surface on the drying rate is studied. The simulations indicate an edge effect characterized by a noticeable variation of saturation in a thin layer adjacent to the porous surface. Also, the results indicate a significant nonlocal equilibrium effect at the surface. The simulation results are exploited to test Schlünder's classical model which offers a simple closure relationship between the evaporation rate and the degree of occupancy of the surface by the liquid. In addition to new insights into the surface phenomena, the results open up new prospects for improving the continuum models of the drying process.

Item Type:Article
HAL Id:hal-02001512
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Otto Von Guericke Universität Magdeburg - OVGU (GERMANY)
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Deposited On:16 Jan 2019 11:13

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