Abstract To further understand and monitor the thermal–hydraulic (TH) status of large domain of pressurized water reactor (PWR) core, an applicable engineering approach with high efficiency and high spatial resolution is critical. Traditional engineering computational fluid dynamics (CFD) computation needs too many computing resources to effectively analyze large domain engineering application for PWR core. In this study, a distributed-parallel (DP) CFD scheme is presented. This scheme separates the large domain into some sub-domains in order to optimize computing time and resources. The design completely retains the complex structures and fine-scale CFD mesh. In addition, it also significantly reduces the computing resources and time, and a fine-scale, full-height CFD analysis can be done in hours for all assemblies. Moreover, important design requirements such as energy consumption ratio, relative computing domain, relative assembly number, and the ranking method of important locations are also designed to optimize the applications of DP scheme to satisfy different engineering demands. The performance of the proposed scheme is evaluated using the CFD computation of a representative region from all 121 assemblies in a PWR core. This research serves to advance the development of engineering CFD computation for PWR core.

中文翻译：

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压水堆堆芯中所有燃料组件的分布式并行 CFD 计算

摘要 为了进一步了解和监测压水堆（PWR）堆芯大域的热工水力（TH）状态，一种具有高效率和高空间分辨率的适用工程方法至关重要。传统的工程计算流体动力学 (CFD) 计算需要太多的计算资源来有效分析 PWR 核心的大领域工程应用。在本研究中，提出了分布式并行 (DP) CFD 方案。该方案将大域分成一些子域，以优化计算时间和资源。该设计完全保留了复杂的结构和精细尺度的 CFD 网格。此外，它还显着减少了计算资源和时间，并且可以在数小时内对所有组件进行精细的全高度 CFD 分析。而且，还设计了能耗比、相对计算域、相对装配数、重要位置排序方法等重要设计要求，优化DP方案的应用，以满足不同的工程需求。使用来自 PWR 堆芯中所有 121 个组件的代表性区域的 CFD 计算来评估所提议方案的性能。这项研究有助于推动 PWR 堆芯工程 CFD 计算的发展。使用来自 PWR 堆芯中所有 121 个组件的代表性区域的 CFD 计算来评估所提议方案的性能。这项研究有助于推动 PWR 堆芯工程 CFD 计算的发展。使用来自 PWR 堆芯中所有 121 个组件的代表性区域的 CFD 计算来评估所提议方案的性能。这项研究有助于推动 PWR 堆芯工程 CFD 计算的发展。