ABSTRACT Buildings’ smoke extraction systems are commonly designed according to guidelines and standards. This approach does not take all boundary conditions into account that may occur within the lifespan of a building. We introduce a novel approach for evaluating the robustness of smoke extraction systems that incorporates realistic boundary conditions by means of the Monte Carlo CFD simulation method. We use a large number of simulations with randomly generated boundary conditions and an evaluation criterion based on visibility range to assess the performance. Based on this novel approach, we compare a natural and a mechanical smoke extraction system. The simulation results show that the mean visibility range with the natural smoke extraction system is 1.3 times higher. However, the mechanical smoke extraction system works sufficiently at a wider range of boundary conditions within the first five minutes after the start of a fire, which is the crucial phase of an evacuation.

中文翻译：

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建筑物自然和机械排烟系统的数值鲁棒性分析

摘要 建筑物的排烟系统通常是根据指南和标准设计的。这种方法没有考虑建筑物寿命内可能出现的所有边界条件。我们介绍了一种评估烟雾提取系统稳健性的新方法，该方法通过蒙特卡罗 CFD 模拟方法结合了现实边界条件。我们使用大量具有随机生成的边界条件的模拟和基于可见度范围的评估标准来评估性能。基于这种新颖的方法，我们比较了自然和机械排烟系统。仿真结果表明，采用自然排烟系统的平均能见度范围提高了 1.3 倍。然而，