Počet záznamů: 1
CFD simulations of the effect of wind on the spontaneous heating of coal stockpiles
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SYSNO ASEP 0425324 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název CFD simulations of the effect of wind on the spontaneous heating of coal stockpiles Tvůrce(i) Taraba, B. (CZ)
Michalec, Zdeněk (UGN-S)
Michalcová, V. (CZ)
Blejchař, T. (CZ)
Bojko, M. (CZ)
Kozubková, M. (CZ)Celkový počet autorů 6 Zdroj.dok. Fuel. - : Elsevier - ISSN 0016-2361
Roč. 118, č. 1 (2014), s. 107-112Poč.str. 6 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova coal oxidation ; spontaneous heating ; CFD modelling ; coal stockpile Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Institucionální podpora UGN-S - RVO:68145535 UT WOS 000329116600015 DOI 10.1016/j.fuel.2013.10.064 Anotace A 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. Pracoviště Ústav geoniky Kontakt Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Rok sběru 2015 Elektronická adresa http://www.sciencedirect.com/science/article/pii/S0016236113010053#
Počet záznamů: 1