Abstract A numerical methodology is used to track the interfacial dynamics of the dryout mechanism for flow boiling around the heated cylindrical rod. The mathematical model is based on the Volume of Fluid interface capturing technique for two-phases of fluids. A single set of Navier-Stokes equations with an added source term to take care of vapor mass flux generation due to phase change is utilized. The simulations are carried out for various combinations of flow parameters and heating conditions at a representative higher working pressure of 40 bar, which is usually observed in Boiling Water Reactors (BWR). Various mechanisms of dryout, such as disturbance wave generation, droplet entrainment, deposition, rewetting, nucleation beneath the thin annular film, and its dynamics are illustrated with pictorial representations. The liquid phase fraction distribution across radial and axial planes, wall temperature, and heat transfer coefficient are used to quantify the dryout characteristics.

中文翻译：

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通过在温度和热通量控制加热棒周围沸腾的环形流中的连续界面动力学，在干燥途中

摘要 一种数值方法用于跟踪加热圆柱棒周围流动沸腾的干燥机制的界面动力学。数学模型基于两相流体的流体体积界面捕获技术。使用了一组 Navier-Stokes 方程，其中添加了一个源项来处理由于相变而产生的蒸汽质量通量。模拟是针对流动参数和加热条件的各种组合在 40 bar 的代表性较高工作压力下进行的，这通常在沸水反应堆 (BWR) 中观察到。干燥的各种机制，如干扰波的产生、液滴夹带、沉积、再润湿、环形薄膜下方的成核，及其动力学都用图形表示。