Research output: Contribution to journal › Article › peer-review
Numerical and experimental study of downward flame spread along multiple parallel fuel sheets. / Joshi, Atul Kumar; Kumar, Amit; Raghavan, Vasudevan et al.
In: Fire Safety Journal, Vol. 125, 103414, 10.2021.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Numerical and experimental study of downward flame spread along multiple parallel fuel sheets
AU - Joshi, Atul Kumar
AU - Kumar, Amit
AU - Raghavan, Vasudevan
AU - Trubachev, S. A.
AU - Shmakov, A. G.
AU - Korobeinichev, O. P.
AU - Kumar B, Praveen
N1 - Funding Information: The authors acknowledge funding from Joint RSF/DST Grant 16-49-02017 and DST/INT/RUS/RSF/P-16 . Publisher Copyright: © 2021 Elsevier Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/10
Y1 - 2021/10
N2 - In the present study, downward flame spread over multiple parallel fuel sheets is investigated experimentally and numerically to understand the mechanism that controls the flame spread process and compare that with the flame spread over a single fuel sheet. A 2D numerical model, based on OpenFOAM is used to simulate the flame spread in a natural convective environment under normal gravity. The model is validated with detailed experimental data involving spatial distributions of temperature and species, and flame spread rates. Flame spread rates on central fuel sheet have been measured in 3 parallel fuel sheets configurations, considering spacing (s) between the fuel sheets in the range of 0.5 cm–3 cm. The flame spread rate varies non-monotonically with spacing, with a peak spread rate at 1 cm spacing between the fuel sheets. Conduction is the dominant mode of heat transfer to the single fuel sheet case. However, in the case of multiple fuel sheets, radiation contributes almost to the same order as that of conduction. The non-monotonic trend in the flame spread rate with spacing is attributed to two opposing effects, namely, increase in oxygen availability and decrease in heat transfer to the fuel, with an increase in the spacing between the fuel sheets.
AB - In the present study, downward flame spread over multiple parallel fuel sheets is investigated experimentally and numerically to understand the mechanism that controls the flame spread process and compare that with the flame spread over a single fuel sheet. A 2D numerical model, based on OpenFOAM is used to simulate the flame spread in a natural convective environment under normal gravity. The model is validated with detailed experimental data involving spatial distributions of temperature and species, and flame spread rates. Flame spread rates on central fuel sheet have been measured in 3 parallel fuel sheets configurations, considering spacing (s) between the fuel sheets in the range of 0.5 cm–3 cm. The flame spread rate varies non-monotonically with spacing, with a peak spread rate at 1 cm spacing between the fuel sheets. Conduction is the dominant mode of heat transfer to the single fuel sheet case. However, in the case of multiple fuel sheets, radiation contributes almost to the same order as that of conduction. The non-monotonic trend in the flame spread rate with spacing is attributed to two opposing effects, namely, increase in oxygen availability and decrease in heat transfer to the fuel, with an increase in the spacing between the fuel sheets.
KW - Conduction and radiation heat transfer
KW - Downward flame spread
KW - Flame interaction
KW - Flame spread rate
KW - Multiple solid fuels
UR - http://www.scopus.com/inward/record.url?scp=85109842604&partnerID=8YFLogxK
U2 - 10.1016/j.firesaf.2021.103414
DO - 10.1016/j.firesaf.2021.103414
M3 - Article
AN - SCOPUS:85109842604
VL - 125
JO - Fire Safety Journal
JF - Fire Safety Journal
SN - 0379-7112
M1 - 103414
ER -
ID: 29130467