Comparison of Experimental and FDS Data for Calculating Heat-Affected Range in Forest Fires

Kim, H.S.; Kang, Y.J.; Kim, J.H.; Kim, K.H.; Lee, B.D.; Kim, Jeong Hun

doi:10.14346/jkosos.2014.29.4.091

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…2(b) shows evidence of lattice distortion in the eutectic Si phase and matrix after T6 heat treatment. This is reported to be due to the difference in thermal expansion coefficient between the Al matrix and the Si semi-metal particles [16]. The thermal expansion coefficient of Al matrix and Si phase are 7.63×10 -6 and 28.7×10 -6 , respectively, which is a difference of approximately 3.8 times.…”

Section: Resultsmentioning

confidence: 98%

“…The thermal expansion coefficient of Al matrix and Si phase are 7.63×10 -6 and 28.7×10 -6 , respectively, which is a difference of approximately 3.8 times. As a result, during quenching after solution heat treatment, a compressive stress field was formed on the Al matrix around the Si phase [16][17][18]. This also is suspected to be an additional factor that contributes to the increased hardness of Al-12wt.%Si T6 alloy.…”

Section: Resultsmentioning

confidence: 99%

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Archives of Metallurgy and Materials

Kang

Kim

Hwang³

et al. 2019

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This study investigated the effect of T6 heat treatment on the microstructure and scratch wear behavior of hypoeutectic Al-12wt.%Si alloy manufactured by extrusion. Microstructural observation identified spherical eutectic Si phases before and after the heat treatment of alloys (F, T6). Phase analysis confirmed Al matrix and Si phase as well as Al 2 Cu and Al 3 Ni, Mg 2 Si in both alloys. In particular, Al 2 Cu was finer and more evenly distributed in T6 alloy. This resulted in Vickers hardness of T6 alloy that was 2.3 times greater compared to F alloy. The scratch wear test was conducted using constant load scratch test (CLST) mode and multi-pass scratch test (MPST) mode. The scratch coefficient and worn out volume obtained by such were used to evaluate wear properties before and after heat treatment. In the case of T6 alloy, its scratch coefficient was lower than F alloy in all load ranges. After 15 repeated tests to measure worn out volume, F alloy and T6 alloy measured 1.2×10 -1 mm 3 and 7.8×10 -2 mm 3 , respectively. In other words, the wear resistance of T6 alloy were confirmed to be better than those of F alloy. In addition, this study attempted to identify the microstructural factors that contribute to the better scratch wear resistance of T6 alloy and wear mechanism from surface and cross-section observations after the wear tests.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Archives of Metallurgy and Materials

Kang

Kim

Hwang³

et al. 2019

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“…The difference from the data obtained is due to the lack of accurate data on the experimental conditions. In [13], the simulation results are also presented in comparison with field trials, the correctness of calculations for the field model in FDS is stated, but also cases of discrepancy between modeling data and field experiment are noted. At present, there is no such program that correctly describes the actual tests of different configurations.…”

mentioning

confidence: 99%

Field modeling of heat transfer in atrium

Nedryshkin

Gravit

Bushuev

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract.The results of calculating fire risk are an important element in the system of modern fire safety assessment. The article reviews the work on the mathematical modeling of fire in the room. A comparison of different calculation models in the programs of fire risk assessment and fire modeling was performed. The results of full-scale fire tests and fire modeling in the FDS program are presented. The analysis of empirical and theoretical data on fire modeling is made, a conclusion is made about the modeling accuracy in the FDS program.

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Analysis of Crown Fire Transition and Spread over Various Pine Trees Using Wildland–Urban Interface Fire Dynamic Simulator

권¹,

김²,

이³

et al. 2021

J. Korean Soc. Hazard Mitig

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The crown fire of various pine trees was investigated using a wildland–urban interface fire dynamics simulator (WFDS). The effects of wind speeds and the spatial distances between fuels on crown fire ignition and spread were investigated. The average 30-year values of atmospheric conditions in March and April were used as the reference conditions to represent the climatic conditions for the wildfire season. As the wind speed increases, crown fire initiation is promoted, and the intensity and spread rate of the crown fire increase. The effects of the spatial distance on the crown fire depend on the wind speed and fuel conditions. The results show that a computational fluid dynamics tool using physics-based models, such as the WFDS, can predict the crown fire ignition and spread behaviors for domestic pine trees. However, further studies are required for other vegetation and domestic atmospheric conditions to validate the applicability of the WFDS on domestic fuels.

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Comparison of Experimental and FDS Data for Calculating Heat-Affected Range in Forest Fires

Cited by 3 publications

References 2 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Field modeling of heat transfer in atrium

Analysis of Crown Fire Transition and Spread over Various Pine Trees Using Wildland–Urban Interface Fire Dynamic Simulator

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