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Darcy Scale Modeling of Smoldering: Impact of Heat Loss

Pozzobon, Victor and Salvador, Sylvain and Baud, Germain and Debenest, Gérald Darcy Scale Modeling of Smoldering: Impact of Heat Loss. (2016) Combustion Science and Technology, 189 (2). 340-365. ISSN 0010-2202

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Official URL: https://doi.org/10.1080/00102202.2016.1214585

Abstract

Modelling the propagation of smoldering fronts with forced air feeding in a porous medium remains a challenge to science. One of the main difficulties is to describe the carbon oxidation reaction that supports this self-sustained process. Pore scale approaches are required to tackle this complex coupled heat and mass transfer problem with chemistry. They nevertheless require high computation effort and still miss experimental validation. Furthermore, the heat loss at the walls of the cells inherent to every laboratory scale system adds another level of complexity in the understanding of the coupling between the phenomena at stake. Indeed, it induces a non homogeneous temperature field throughout the system. In this paper, a 2D Darcy scale model is developed and validated by confrontation with experimental results from the literature, covering wide ranges of carbon content of the medium and forced air velocity. A reasonable description of the front temperature, velocity and non-consumption oxygen amount is reached. The model finally enables to bring understanding of the impact of heat loss which controls front shape and stability near the system walls.

Item Type:Article
Additional Information:Thanks to Taylor and Francis editor. The definitive version is available at : http://www.tandfonline.com/ The original PDF of the article can be found at: http://www.tandfonline.com/doi/full/10.1080/00102202.2016.1214585
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Funders:
ANR INSICOMB
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Deposited By: Gerald DEBENEST
Deposited On:12 Jul 2017 09:40

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