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Properties of a diffuse interface model based on a porous medium theory for solid–liquid dissolution problems

Luo, Haishan and Quintard, Michel and Debenest, Gérald and Laouafa, Farid Properties of a diffuse interface model based on a porous medium theory for solid–liquid dissolution problems. (2012) Computational Geosciences, 16 (4). 913-932. ISSN 1420-0597

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Official URL: http://dx.doi.org/10.1007/s10596-012-9295-1

Abstract

In this paper, a local non-equilibrium diffuse interface model is introduced for describing solid– liquid dissolution problems. The model is developed based on the analysis of Golfier et al. (J Fluid Mech 457:213–254,2002) upon the dissolution of a porous domain, with the additional requirement that density variations with the mass fraction are taken into account. The control equations are generated by the upscaling of the balance equations for a solid–liquid dissolution using a volume averaging theory. This results into a diffuse interface model(DIM) that does not require an explicit treatment of the dissolving interface, e.g., the use of arbitrary Lagrangian–Eulerian (ALE) methods, for instance. Test cases were performed to study the features and influences of the effective coefficients in-side the DIM. In particular, an optimum expression for the solid–liquid exchange coefficient is obtained from a comparison with the referenced solution by ALE simulations. Finally, a Ra–Pe diagram illustrates the interaction of natural convection and forced convection in the dissolution problem.

Item Type:Article
Additional Information:Thanks to Springer Verlag. The original publication is available at http://link.springer.com
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 - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Michel QUINTARD
Deposited On:09 Apr 2013 07:05

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