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VALIDATION OF A SUBGRID MODEL FOR POROUS BURNERS SIMULATIONS

Volume 2, Issue 2, 2011, pp. 91-100
DOI: 10.1615/SpecialTopicsRevPorousMedia.v2.i2.30
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ABSTRACT

A subgrid model for the flame speed is proposed for the simulation of flow and reaction in porous inert media. The subgrid model relies on the asymptotic structure of the flame presented in a previous work. The asymptotic results are used to build a microscale model for the flame speed as function of the heat recirculation efficiency of the burner. Then a macroscale model is formulated with the volume-averaged conservation equations and a kinematic equation to describe the movement of the flame front (level-set method). Results of a 1D simulation of a porous radiant burner are presented to illustrate the method and the model limitations are evaluated. Results show that the proposed model is able to connect the subgrid model with the large-scale problem with heat losses and that better results are obtained when sufficient scales separation is achieved. Multidimensional implementation is also discussed.

CITED BY
  1. Jiang Linsong, Liu Hongsheng, Wu Dan, Wang Jiansheng, Xie Mao-Zhao, Bai Minli, Pore-Scale Simulation of Hydrogen–Air Premixed Combustion Process in Randomly Packed Beds, Energy & Fuels, 31, 11, 2017. Crossref

  2. Chen Zhongshan, Shi Junrui, Xie Maozhao, Yue Meng, A Numerical Investigation on the Rapid Turbulent Filtration Combustion under High Background Pressure, Combustion Science and Technology, 2021. Crossref

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