Simulating melt spreading into shallow water using moving particle hydrodynamics with turbulence model
Simulating melt spreading into shallow water using moving particle hydrodynamics with turbulence model
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DOI：
10.1007/s40571-022-00520-7
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发表时间：
2022-10
影响因子：
3.3
通讯作者：
R. Yokoyama;M. Kondo;Shunichi Suzuki;K. Okamoto
中科院分区：
文献类型：
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作者：
R. Yokoyama;M. Kondo;Shunichi Suzuki;K. Okamoto
本文采用运动粒子流体力学（MPH）方法计算了熔融金属在水中的扩散。为预测福岛第一核电站主安全壳内燃料碎片的扩散，对熔融金属的扩散和凝固行为进行了模拟，并与实验结果进行了比较。在不同的水位下进行了计算和实验。为了模拟湍流对金属液和水之间传热的影响，在计算中采用了大涡模拟（LES）模型。通过求解能量方程，建立了基于固体分数的黏度模型来描述熔融金属的凝固行为。通过引入湍流模型，较好地再现了随水位变化的凝固行为。
In this study, molten metal spreading into water is calculated using moving particle hydrodynamics (MPH) which is one of the particle methods. The spreading and solidification behavior of the molten metal is simulated and compared with the experiment, which is for predicting the fuel debris spreading in the primary containment vessel (PCV) in Fukushima Daiichi Nuclear Power Plant (1F NPPs). The calculation and experiments were carried out with various water levels. To simulate the turbulence effect which enhances the heat transfer between the molten metal and water, large eddy simulation (LES) model was taken in the calculation. The solidification behaviors of the molten metal were expressed by the solid fraction-dependent viscosity model together with solving the energy equation. The solidification behavior depending on the water level was well reproduced by the introduction of the turbulence model.