CFD and experimental studies of room fire growth on wall lining materials

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CFD and experimental studies of room fire growth on wall lining materials. / Yan, Zhenghua; Holmstedt, Göran.

In: Fire Safety Journal, Vol. 27, No. 3, 1996, p. 201-238.

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Yan, Zhenghua ; Holmstedt, Göran. / CFD and experimental studies of room fire growth on wall lining materials. In: Fire Safety Journal. 1996 ; Vol. 27, No. 3. pp. 201-238.

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TY - JOUR

T1 - CFD and experimental studies of room fire growth on wall lining materials

AU - Yan, Zhenghua

AU - Holmstedt, Göran

PY - 1996

Y1 - 1996

N2 - CFD simulation and experimental tests have been carried out to study the room corner fire growth on combustible wall-lining materials. In the CFD simulation, the turbulent mass and heat transfer, and combustion were considered. The discrete transfer (DT) method was employed to calculate the radiation with an absorptivity and emissivity model employed to predict the radiation property of combustion products including soot, CO2 and H2O, which are usually the primary radiating species in the combustion of hydrocarbon fuels. The temperature of the solid boundary was determined by numerical solution of the heat conduction equation. A simple and practical pyrolysis model was developed to describe the response of the solid fuel. This pyrolysis model was first tested against the Cone Calorimeter data for both charring and non-charring materials under different irradiance levels and then coupled to CFD calculations. Both full and one-third scale room corner fire growths on particle board were modelled with CFD. The calculation was tested with various numbers of rays and grid sizes, showing that the present choice gives practically grid- and ray number-independent predictions. The heat release rate, wall surface temperature, char depth, gas temperature and radiation flux are compared with experimental measurements. The results are reasonable and the comparison between prediction and experiment is fairly good and promising.

AB - CFD simulation and experimental tests have been carried out to study the room corner fire growth on combustible wall-lining materials. In the CFD simulation, the turbulent mass and heat transfer, and combustion were considered. The discrete transfer (DT) method was employed to calculate the radiation with an absorptivity and emissivity model employed to predict the radiation property of combustion products including soot, CO2 and H2O, which are usually the primary radiating species in the combustion of hydrocarbon fuels. The temperature of the solid boundary was determined by numerical solution of the heat conduction equation. A simple and practical pyrolysis model was developed to describe the response of the solid fuel. This pyrolysis model was first tested against the Cone Calorimeter data for both charring and non-charring materials under different irradiance levels and then coupled to CFD calculations. Both full and one-third scale room corner fire growths on particle board were modelled with CFD. The calculation was tested with various numbers of rays and grid sizes, showing that the present choice gives practically grid- and ray number-independent predictions. The heat release rate, wall surface temperature, char depth, gas temperature and radiation flux are compared with experimental measurements. The results are reasonable and the comparison between prediction and experiment is fairly good and promising.

KW - Fires

KW - Calorimeters

KW - Combustion

KW - Computational fluid dynamics

KW - Heat conduction

KW - Heat radiation

KW - Heat transfer

KW - Pyrolysis

KW - Temperature

U2 - 10.1016/S0379-7112(96)00044-6

DO - 10.1016/S0379-7112(96)00044-6

M3 - Article

VL - 27

SP - 201

EP - 238

JO - Fire Safety Journal

JF - Fire Safety Journal

SN - 0379-7112

IS - 3

ER -