Advances in modelling in CFD simulations of turbulent gaseous pool fires
Advances in modelling in CFD simulations of turbulent gaseous pool fires
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DOI：
10.1016/j.combustflame.2017.03.012
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发表时间：
2017-07
影响因子：
4.4
通讯作者：
G. Maragkos;T. Beji;B. Merci
中科院分区：
文献类型：
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作者：
G. Maragkos;T. Beji;B. Merci
大涡模拟（LES）使用先进的建模方法有关的热物理，湍流和燃烧建模和他们的优势相比，在消防界使用的一些标准模型进行了分析。更具体地说，FireFOAM 2.2.x的修改版本中包含了对非统一刘易斯数和Hirschfelder-Curtiss扩散模型的考虑、微分扩散和Soret效应的纳入、具有可变湍流Prandtl数公式的动态湍流模型的应用以及沿着EDC燃烧模型。新的和标准模型的预测之间的比较，可在代码对实验数据的中型24.6千瓦甲醇池火灾。与代码中的标准模型相比，高级建模方法的预测在质量和数量上都更好，而计算成本仅增加20%。
Large eddy simulations (LES) using advanced modelling approaches related to thermophysical, turbulence and combustion modelling are presented and their advantages when compared to some of the standard models used in the fire community are analyzed. More specifically, the consideration of a non-unity Lewis number and the Hirschfelder–Curtiss diffusion model, the inclusion of differential diffusion and Soret effects, the application of a dynamic turbulence model with a variable turbulent Prandtl number formulation, along with the EDC combustion model, have been included in a modified version of FireFOAM 2.2.x. A comparison between the predictions of the new and the standard models available in the code against experimental data of a medium-scale 24.6 kW methanol pool fire is presented. The predictions with the advanced modelling approaches are qualitatively and quantitatively better when compared to the standard models in the code, while having only a 20% increased computational cost.