Tomography-based determination of effective transport properties for reacting porous media / Sophia Haussener in Journal of heat transfer, Vol. 134 N° 1 (Janvier 2012)  

Public ISBD [article]  inJournal of heat transfer > Vol. 134 N° 1 (Janvier 2012) . - 08 p. Titre : Tomography-based determination of effective transport properties for reacting porous media Type de document : texte imprimé Auteurs : Sophia Haussener, Auteur ; Iwan Jerjen, Auteur ; Peter Wyss, Auteur Année de publication : 2012 Article en page(s) : 08 p. Note générale : Heat transfer Langues : Anglais (eng) Mots-clés : Chemically reactive flow Computerised tomography Convection Finite volume methods Flow simulation through porous media Fuel gasification Mass transfer Porosity Pyrolysis Solid-vapour transformations Thermochemistry Two-phase Index. décimale : 536 Chaleur. Thermodynamique Résumé : The effective heat and mass transport properties of a porous packed bed of particles undergoing a high-temperature solid–gas thermochemical transformation are determined. The exact 3D geometry of the reacting porous media is obtained by high-resolution computed tomography. Finite volume techniques are applied to solve the governing conservation equations at the pore-level scale and to determine the effective transport properties as a function of the reaction extent, namely, the convective heat transfer coefficient, permeability, Dupuit–Forchheimer coefficient, tortuosity, and residence time distributions. These exhibit strong dependence on the bed morphological properties (e.g., porosity, specific surface area, particle size) and, consequently, vary with time as the reaction progresses. DEWEY : 536 ISSN : 0022-1481 En ligne : http://www.asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013400 [...] [article] Tomography-based determination of effective transport properties for reacting porous media [texte imprimé] / Sophia Haussener, Auteur ; Iwan Jerjen, Auteur ; Peter Wyss, Auteur . - 2012 . - 08 p. Heat transfer Langues : Anglais (eng) in Journal of heat transfer > Vol. 134 N° 1 (Janvier 2012) . - 08 p. Mots-clés : Chemically reactive flow Computerised tomography Convection Finite volume methods Flow simulation through porous media Fuel gasification Mass transfer Porosity Pyrolysis Solid-vapour transformations Thermochemistry Two-phase Index. décimale : 536 Chaleur. Thermodynamique Résumé : The effective heat and mass transport properties of a porous packed bed of particles undergoing a high-temperature solid–gas thermochemical transformation are determined. The exact 3D geometry of the reacting porous media is obtained by high-resolution computed tomography. Finite volume techniques are applied to solve the governing conservation equations at the pore-level scale and to determine the effective transport properties as a function of the reaction extent, namely, the convective heat transfer coefficient, permeability, Dupuit–Forchheimer coefficient, tortuosity, and residence time distributions. These exhibit strong dependence on the bed morphological properties (e.g., porosity, specific surface area, particle size) and, consequently, vary with time as the reaction progresses. DEWEY : 536 ISSN : 0022-1481 En ligne : http://www.asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013400 [...]

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