期刊
COMBUSTION SCIENCE AND TECHNOLOGY
卷 189, 期 2, 页码 340-365出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00102202.2016.1214585
关键词
Homogeneous porous medium; Modeling; Smoldering
资金
- French Agence Nationale de la Recherche of the INSICOMB [ANR-11-BS009-005-01]
Modeling 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 nonhomogeneous temperature field throughout the system. In this article, 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 understanding of the impact of heat loss, which controls the front shape and stability near the system walls.
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