Impact of Drag Force between Droplet and Gas on Suppression of a Buoyancy-Controlled Fire via Water Mist
Abstract
The present work provides a detailed experimental and numerical study on suppression of a heptane medium-scale pool fire by applying water mist. The customarily described well defined structure of the flame does not exist any longer by application of water mist. It is observed that the size and shape of the flame vary randomly and continuously due to sudden and short mist vaporization periods. An injection of the finely divided water mist (50μm) into a buoyancy-induced fire has a combustion-supporting effect of a heptane pool fire. In no mist case, contribution of the radiation heat flux to the pyrolysis rate of liquid fuel seems predominant. However, with addition of water mist, an increasing trend in burning rate is related mainly to the significance of convective heat flux due to moving of the flame region towards the liquid surface. This behavior suggests that extinguishment is achieved by total clearance of the liquid surface rather than from reduction in flame-to-liquid surface heat feedback. The numerical work provides the detailed temperature and species fields in addition to radiation/convection heat fluxes over the liquid surface during the addition of a water mist by using various drag force models.
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BibTeX
@article{houndekon2026impact,
title = {{Impact of Drag Force between Droplet and Gas on Suppression of a Buoyancy-Controlled Fire via Water Mist}},
author = {Marianne Houndekon and Hui-Ying Wang and Bruno Coudour and Jean-Pierre Garo},
journal = {Journal of Engineering and Applied Sciences Technology},
year = {2026},
month = oct,
doi = {10.47363/jeast/2026(8)381},
url = {https://hal.science/hal-05771737v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Impact of Drag Force between Droplet and Gas on Suppression of a Buoyancy-Controlled Fire via Water Mist
AU - Marianne Houndekon
AU - Hui-Ying Wang
AU - Bruno Coudour
AU - Jean-Pierre Garo
PY - 2026
DA - 2026/10/06
JO - Journal of Engineering and Applied Sciences Technology
DO - 10.47363/jeast/2026(8)381
UR - https://hal.science/hal-05771737v1
AB - The present work provides a detailed experimental and numerical study on suppression of a heptane medium-scale pool fire by applying water mist. The customarily described well defined structure of the flame does not exist any longer by application of water mist. It is observed that the size and shape of the flame vary randomly and continuously due to sudden and short mist vaporization periods. An injection of the finely divided water mist (50μm) into a buoyancy-induced fire has a combustion-supporting effect of a heptane pool fire. In no mist case, contribution of the radiation heat flux to the pyrolysis rate of liquid fuel seems predominant. However, with addition of water mist, an increasing trend in burning rate is related mainly to the significance of convective heat flux due to moving of the flame region towards the liquid surface. This behavior suggests that extinguishment is achieved by total clearance of the liquid surface rather than from reduction in flame-to-liquid surface heat feedback. The numerical work provides the detailed temperature and species fields in addition to radiation/convection heat fluxes over the liquid surface during the addition of a water mist by using various drag force models.
SN - 2634-8853
ER -