Modeling and simulation of liquid pool fires with in-depth radiation absorption and heat transfer

Topi Sikanen*, Simo Hostikka

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

38 Citations (Scopus)

Abstract

In this paper we present a computational fluid dynamics model for predicting the heat release rates of liquid pool fires. The model makes use of the one-dimensional heat transfer solver to provide the liquid surface boundary condition for the gas phase solver. The in-depth radiation transport is solved by a one-dimensional radiation transport model together with effective absorption coefficients determined from experimental data. The model accounts for the convective heat transfer in the liquid phase by modifying the thermal conductivity. The model is implemented as a boundary condition in the fire dynamics simulator (FDS). The model is validated by comparing experimental and predicted evaporation rates for water and a range of hydrocarbon fuels. The sensitivity of the results to the modelling assumptions and model input parameters is studied. The in-depth heat transfer appears to have a significant effect on the fire dynamics, except for the peak burning rates, which depend most importantly on the gas phase combustion. (C) 2016 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)95-109
Number of pages15
JournalFire Safety Journal
Volume80
DOIs
Publication statusPublished - Feb 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Burning rate
  • Heat release rate
  • Pool fire
  • Fuel absorption
  • Thermal radiation
  • ACCURATE OPTICAL-CONSTANTS
  • DIESEL FUEL DROPLETS
  • INFRARED INTENSITIES
  • INTEGRATED-INTENSITIES
  • 25-DEGREES-C
  • METHANOL
  • COEFFICIENTS
  • SPECTRA
  • CM(-1)
  • LABORATORIES

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