Abstract This study investigates the measurements data attained in Murcia Atrium fire tests (Gutiérrez-Montes, Sanmiguel-Rojas, Viedma, & Rein) using general CFD code, CFX-16.2 ( CFX-16.2, ANSYS, Inc.). Experiments were executed by burning heptane as a fuel for three different fires capacities, (1.32, 2.28 and 2.34 MW). Historically, CFX was validated with experimental data for compartment fires including natural ventilation only. In this paper validation was performed for developing fires during transient period in a large space, including the effect of combined natural and forced ventilation. Two different combustion models i.e. Non-combustion model and Eddy Dissipation Model (EDM) were used to represent the combustion of heptane. Four different approaches were employed to determine the predicted dynamic behavior of the smoke height and to evaluate the accuracy of CFX predictions. The results display CFX predictions have a reasonable concord with the experimental data. Therefore, CFX can be a valid tool for performance-based engineering to evaluate the smoke systems required for complex enclosed structures.

中文翻译：

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用 CFD 对自然通风和强制通风相结合的实验中庭火灾进行数值模拟

摘要 本研究使用通用 CFD 代码 CFX-16.2 (CFX-16.2, ANSYS, Inc.) 调查 Murcia Atrium 火灾测试 (Gutiérrez-Montes、Sanmiguel-Rojas、Viedma 和 Rein) 中获得的测量数据。实验是通过燃烧庚烷作为三种不同火力（1.32、2.28 和 2.34 MW）的燃料来进行的。从历史上看，CFX 仅使用包括自然通风在内的隔间火灾的实验数据进行验证。在本文中，对大空间瞬态期间发生的火灾进行了验证，包括自然通风和强制通风相结合的影响。两种不同的燃烧模型，即非燃烧模型和涡流耗散模型（EDM）被用来表示庚烷的燃烧。采用四种不同的方法来确定烟雾高度的预测动态行为并评估 CFX 预测的准确性。结果显示 CFX 预测与实验数据具有合理的一致性。因此，CFX 可以成为基于性能的工程评估复杂封闭结构​​所需的烟雾系统的有效工具。