Rigorous upscaling of the infinite adsorption rate reactive flow under dominant Peclet number through a pore |
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Authors: | Andro Mikelić Carole Rosier |
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Institution: | (1) Université de Lyon, 69003 Lyon, France;(2) Institut Camille Jordan, UFR Mathématiques, Université Lyon 1, Site de Gerland, Bat. A, 50, avenue Tony Garnier, 69367 Lyon Cedex 07, France;(3) Laboratoire de mathématiques pures et appliquées “Joseph Liouville”, Université du Littoral, 50, rue F. Buisson, B.P. 699, 62228 Calais Cedex, France |
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Abstract: | In this paper we present a rigorous derivation of the effective model for enhanced diffusion through a narrow and long 2D
pore. The analysis uses the anisotropic singular perturbation technique. Starting point is a local pore scale model describing
the transport by convection and diffusion of a reactive solute. The solute particles undergo an adsorption process at the
lateral tube boundary, with high adsorption rate. The transport and reaction parameters are such that we have large, dominant
Peclet number with respect to the ratio of characteristic transversal and longitudinal lengths (the small parameter ). We give a formal derivation of the model using the anisotropic multiscale expansion with respect to . Error estimates for the approximation of the physical solution, by the upscaled one, are presented in the energy norm as
well as in L
∞ and L
1 norms with respect to the space variable. They give the approximation error as a power of and guarantee the validity of the upscaled model through the rigorous mathematical justification of the effective behavior
for small .
The research of A. Mikelić and C. Rosier was partially supported by the GDR MOMAS (Modélisation Mathématique et Simulations
numériques liées aux problèmes de gestion des déchets nucléaires) (PACEN/CNRS, ANDRA, BRGM, CEA, EDF, IRSN) as a part of the
project “Changements d’échelle dans la modélisation du transport multiphasique et réactif en milieux poreux : application aux milieux
fracturés et aux argiles”. |
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Keywords: | Taylor’ s dispersion Large Peclet number Singular perturbation Surface chemical reaction Large Damkohler number |
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