Abstract Validation of condensation model of CFD code FLUIDYN-MP has been carried out against two experimental data. The influence of turbulence model and grid size on condensation rate has been studied. Models for the simulation of wall condensation in presence of non-condensable have been developed to simulate the typical post-LOCA steam laden atmosphere of the containment of a Nuclear Power Plant (NPP). This model has been incorporated in the general purpose CFD software FLUIDYN-MP. In this work, the concept of heat and mass transfer analogy (Chilton-Colburn analogy) has been used for modelling of wall condensation. In this analogy, the convective heat transfer coefficient is obtained by Reynolds analogy formulation and the mass transfer coefficient is calculated based on Chilton-Colburn empirical analogy. The wall condensation model implemented in FLUIDYN-MP has been validated against experiments conducted in COPAIN facility at CEA, France and the CONAN facility at University of Pisa, Italy. The paper presents details of the wall condensation model, the methodology for its implementation in the CFD code and results of the validation against reported experimental Data. The results of CFD simulations of these experiments compared well with the measured data.

中文翻译：

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验证 CFD 代码 FLUIDYN-MP，用于在存在不可冷凝气体的情况下壁面的蒸汽冷凝

摘要 针对两个实验数据对CFD 代码FLUIDYN-MP 的凝聚模型进行了验证。研究了湍流模型和网格尺寸对凝结率的影响。已经开发了用于模拟存在不凝性物质时壁面冷凝的模型，以模拟核电厂 (NPP) 安全壳的典型 LOCA 后蒸汽负载大气。该模型已被纳入通用 CFD 软件 FLUIDYN-MP。在这项工作中，传热和传质类比（Chilton-Colburn 类比）的概念已用于壁冷凝建模。在这个类比中，对流传热系数通过雷诺类比公式获得，传质系数根据 Chilton-Colburn 经验类比计算。在 FLUIDYN-MP 中实施的壁冷凝模型已根据在法国 CEA 的 COPAIN 设施和意大利比萨大学的 CONAN 设施中进行的实验进行了验证。本文介绍了壁冷凝模型的详细信息、其在 CFD 代码中的实现方法以及针对报告的实验数据的验证结果。这些实验的 CFD 模拟结果与测量数据很好地进行了比较。