Interface modelling between CFD and FEM analysis: the dual-layer post-processing model
Interface modelling between CFD and FEM analysis: the dual-layer post-processing model
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DOI：
10.1108/ec-06-2015-0146
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发表时间：
2017-04
影响因子：
1.6
通讯作者：
D. Pantousa;E. Mistakidis
中科院分区：
文献类型：
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作者：
D. Pantousa;E. Mistakidis
目的：本文的主要目的是发展一个火灾-结构界面（FSI）模型，这是在这项研究中被称为一个简化的“双层”模型。在防火隔室超过规范（EN 1991-1-2）指南定义的“常规”尺寸的情况下，它是为设计目的而定向的。设计/方法/方式该模型可用于计算流体动力学（CFD）分析的后处理阶段，它是基于气体温度场（空间和时间）的防火分区。要使用“双层”模型，首先应通过计算流体动力学分析的输出确定沿防火隔室高度的气体温度（离散）函数（沿着），在离散平面视图点。该模型将点数据“压缩”到（空间）虚拟区域，该虚拟区域被划分为温度均匀的两个层（相对于防火分区的高度）：上层（热）层和下层（冷）层。结果-该模型计算的气体温度的时间演变在每个虚拟区域分为两层（热，冷层）的防火分区。独创性/价值-这种方法的主要优点是，实际上只有三个不同的变量（界面上层温度和下层温度的高度）在后处理阶段的CFD分析，为每个虚拟区域导出。其次，气体温度可用于使用EN 1993-1-2中提出的简单模型确定结构构件的温度分布。
Purpose The primary purpose of this paper is the development of a fire–structure interface (FSI) model, which is referred in this study as a simplified “dual-layer” model. It is oriented for design purposes, in the cases where fire-compartments exceed the “regular” dimensions, as they are defined by the guidelines of the codes (EN 1991-1-2). Design/methodology/approach The model can be used at the post-processing stage of computational fluid dynamics (CFD) analysis and it is based on the gas-temperature field (spatial and temporal) of the fire-compartment. To use the “dual-layer” model, first the gas-temperature (discrete) function along the height of the fire-compartment, at discrete plan–view points should be determined through the output of the CFD analysis. The model “compresses” the point data to (spatial) virtual zones, which are divided into two layers (with respect to the height of the fire-compartment) of uniform temperature: the upper (hot) layer and the lower (cold) layer. Findings The model calculates the temporal evolution of the gas-temperature in the fire compartment in every virtual zone which is divided in two layers (hot and cold layer). Originality/value The main advantage of this methodology is that actually only three different variables (height of interface upper-layer temperature and lower-layer temperature) are exported during the post-processing stage of the CFD analysis, for every virtual zone. Next, the gas-temperature can be used for the determination of the temperature profile of structural members using simple models that are proposed in EN 1993-1-2.