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    Calculation and analysis of the mobility and diffusion coefficient of thermal electrons in methane/air premixed flames

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    Type
    Article
    Authors
    Bisetti, Fabrizio cc
    El Morsli, Mbark
    KAUST Department
    Clean Combustion Research Center
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Reactive Flow Modeling Laboratory (RFML)
    Date
    2012-12
    Permanent link to this record
    http://hdl.handle.net/10754/562441
    
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    Abstract
    Simulations of ion and electron transport in flames routinely adopt plasma fluid models, which require transport coefficients to compute the mass flux of charged species. In this work, the mobility and diffusion coefficient of thermal electrons in atmospheric premixed methane/air flames are calculated and analyzed. The electron mobility is highest in the unburnt region, decreasing more than threefold across the flame due to mixture composition effects related to the presence of water vapor. Mobility is found to be largely independent of equivalence ratio and approximately equal to 0.4m 2V -1s -1 in the reaction zone and burnt region. The methodology and results presented enable accurate and computationally inexpensive calculations of transport properties of thermal electrons for use in numerical simulations of charged species transport in flames. © 2012 The Combustion Institute.
    Citation
    Bisetti, F., & El Morsli, M. (2012). Calculation and analysis of the mobility and diffusion coefficient of thermal electrons in methane/air premixed flames. Combustion and Flame, 159(12), 3518–3521. doi:10.1016/j.combustflame.2012.08.002
    Sponsors
    This work was supported by two Academic Excellence Alliance (AEA) Grants awarded by the KAUST Office of Competitive Research Funds under the titles "Electromagnetically-enhanced combustion" and "Tracking uncertainty in computational modeling of reactive systems". The authors would like to thank the two anonymous reviewers for their insightful comments and suggestions.
    Publisher
    Elsevier BV
    Journal
    Combustion and Flame
    DOI
    10.1016/j.combustflame.2012.08.002
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.combustflame.2012.08.002
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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