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Statements

Subject Item
n2:RIV%2F68145535%3A_____%2F14%3A00425324%21RIV15-AV0-68145535
rdf:type
n16:Vysledek skos:Concept
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0016236113010053#
dcterms:description
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. 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.
dcterms:title
CFD simulations of the effect of wind on the spontaneous heating of coal stockpiles CFD simulations of the effect of wind on the spontaneous heating of coal stockpiles
skos:prefLabel
CFD simulations of the effect of wind on the spontaneous heating of coal stockpiles CFD simulations of the effect of wind on the spontaneous heating of coal stockpiles
skos:notation
RIV/68145535:_____/14:00425324!RIV15-AV0-68145535
n3:aktivita
n15:P n15:I
n3:aktivity
I, P(GA105/08/1414)
n3:cisloPeriodika
1
n3:dodaniDat
n7:2015
n3:domaciTvurceVysledku
n4:4624564
n3:druhVysledku
n12:J
n3:duvernostUdaju
n11:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
6746
n3:idVysledku
RIV/68145535:_____/14:00425324
n3:jazykVysledku
n18:eng
n3:klicovaSlova
coal oxidation; spontaneous heating; CFD modelling; coal stockpile
n3:klicoveSlovo
n5:spontaneous%20heating n5:coal%20oxidation n5:CFD%20modelling n5:coal%20stockpile
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[3156C2ED21DC]
n3:nazevZdroje
Fuel
n3:obor
n19:DH
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
6
n3:projekt
n14:GA105%2F08%2F1414
n3:rokUplatneniVysledku
n7:2014
n3:svazekPeriodika
118
n3:tvurceVysledku
Blejchař, T. Kozubková, M. Michalcová, V. Michalec, Zdeněk Bojko, M. Taraba, B.
n3:wos
000329116600015
s:issn
0016-2361
s:numberOfPages
6
n8:doi
10.1016/j.fuel.2013.10.064