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Detailed physical modeling of wildland fire dynamics at field scale - An experimentally informed evaluation
Fire Safety Journal ( IF 3.1 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.firesaf.2020.103051
Eric V. Mueller , Nicholas S. Skowronski , Kenneth L. Clark , Michael R. Gallagher , William E. Mell , Albert Simeoni , Rory M. Hadden

Computational Fluid Dynamics (CFD) models are powerful research tools for studying fire dynamics. However, their application to wildland fire scenarios requires evaluation against relevant experimental data. To progress our current understanding of the fidelity of a CFD approach to simulating wildland fire dynamics, a dataset from an experimental fire was used as a test case. First, implications of the level of detail provided to the model, in the form of fuel structure and wind, are evaluated. Second, the predictions of both fire behavior (e.g. spread rate) and the driving combustion processes (e.g. heat flux) are compared to the experiment. It was found that both increasing the detail in canopy fuel structure and implementing turbulent boundary conditions had a minor impact. It was further found that the model reproduced fire behavior in the mid-range of experimental observations and that the representation of local combustion processes was qualitatively consistent. This work demonstrates the promising capabilities of the modeling approach used here, while showing that some of its aspects require further investigation and possibly more development.

中文翻译:

野外火灾动力学的详细物理建模 - 实验性评估

计算流体动力学 (CFD) 模型是研究火灾动力学的强大研究工具。然而,它们在野火场景中的应用需要根据相关实验数据进行评估。为了加深我们目前对模拟荒地火灾动力学的 CFD 方法保真度的理解,使用来自实验火灾的数据集作为测试案例。首先,评估以燃料结构和风的形式提供给模型的详细程度的含义。其次,将火灾行为(例如蔓延率)和驱动燃烧过程(例如热通量)的预测与实验进行比较。结果表明,增加座舱盖燃料结构的细节和实施湍流边界条件的影响很小。进一步发现,该模型在实验观察的中等范围内再现了火灾行为,并且局部燃烧过程的表征在质量上是一致的。这项工作展示了这里使用的建模方法的有前途的能力,同时表明它的某些方面需要进一步调查和可能的更多发展。
更新日期:2020-05-01
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