Lazhar, Ramzi and Najjari, Mustapha and Prat, Marc
Combined wicking and evaporation of NaCl
solution with efflorescence formation: The
efflorescence exclusion zone.
(2020)
Physics of Fluids, 32 (6). 067106. ISSN 1070-6631
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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 6MB |
Official URL: https://doi.org/10.1063/5.0007548
Abstract
An experiment combining wicking and evaporation of a NaCl solution and leading to the formation of salt efflorescence is presented. The experiment shows that efflorescence develops over the porous medium surface exposed to evaporation except in the bottom region of the sample. This region remains free of efflorescence and is called the exclusion zone. It is shown that the exclusion zone extent depends on the solute concentration in the bottom reservoir. A model is developed, and it helps understand the exclusion phenomenon. The arch shape of the exclusion zone upper boundary is explained and modeled. The study is also seen as a successful test for the model of efflorescence growth driven by evaporation and salt precipitation presented in a previous study. The modeling approach is expected to help develop better models of salt transport with crystallization at the surface of porous media in relation with soil salinization issues or the salt weathering of porous materials.
Item Type: | Article |
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HAL Id: | hal-03077914 |
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 > Université de Gabès (TUNISIA) |
Laboratory name: | |
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Deposited On: | 16 Dec 2020 15:18 |
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