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CFD simulations of the effect of wind on the spontaneous heating of coal stockpiles

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    SYSNO ASEP0425324
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleCFD simulations of the effect of wind on the spontaneous heating of coal stockpiles
    Author(s) Taraba, B. (CZ)
    Michalec, Zdeněk (UGN-S)
    Michalcová, V. (CZ)
    Blejchař, T. (CZ)
    Bojko, M. (CZ)
    Kozubková, M. (CZ)
    Number of authors6
    Source TitleFuel. - : Elsevier - ISSN 0016-2361
    Roč. 118, č. 1 (2014), s. 107-112
    Number of pages6 s.
    Publication formOnline - E
    Languageeng - English
    CountryGB - United Kingdom
    Keywordscoal oxidation ; spontaneous heating ; CFD modelling ; coal stockpile
    Subject RIVCF - Physical ; Theoretical Chemistry
    Institutional supportUGN-S - RVO:68145535
    UT WOS000329116600015
    DOI10.1016/j.fuel.2013.10.064
    AnnotationA commercial CFD software program, fluent, was used to study the effect of wind on the spontaneous heating process of a coal stockpile. A two-domain model was developed to simultaneously solve the governing equations of an open porous medium (coal stockpile domain) situated in a homogeneous atmosphere (wind flow domain). Simulations with air blowing from a fixed direction as well as real fluctuations of the airflow both in velocity and direction were performed. Numerical calculations confirmed the promoting role of wind on the dynamics of the development of spontaneous heating. Under the conditions of the simulations, three possible shifts of the hot spot in the stockpile were distinguished when coal undergoes the self-heating process: (1) Shift of the hot spot to the pile surface when spontaneous heating of coal is in progress. (2) Movement of the hot spot inwards the stockpile as the wind speed increases. (3) Transfer of the hot spot from the upper part of the stockpile to the lower part when the self-heating process progresses. Such movement was found for wind speeds <= 3 m s(-1) and clearly is mainly connected with the effect of buoyancy.
    WorkplaceInstitute of Geonics
    ContactLucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354
    Year of Publishing2015
    Electronic addresshttp://www.sciencedirect.com/science/article/pii/S0016236113010053#
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