SPH Analysis of Interfacial Flow of the Two Immiscible Melts
SPH Analysis of Interfacial Flow of the Two Immiscible Melts
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两种不混溶熔体界面流动的 SPH 分析
DOI：
10.1002/9781119333197.ch63
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
and Ryosuke O. Suzuki
中科院分区：
文献类型：
--
作者：
Shungo Natsui;Ryota Nashimoto;Tatsuya Kikuchi;and Ryosuke O. Suzuki
采用光滑粒子流体动力学（SPH）模型研究了气泡上升引发的不互溶两相界面的瞬态行为。该数值方法采用完全拉格朗日粒子模型，可以直接跟踪气相和液相的运动。对不同的Eönumber值对应的不同条件进行了数值模拟，验证了预测的拓扑变化以及气泡的理论压力和界面形状.在不混溶的两种液体的情况下，下液相的柱渗透到上液相的影响界面面积，其形状强烈地依赖于气泡的尾流模式。因此，浮力和液-液界面张力之间的动态平衡决定了界面面积。在高表面张力条件下，如金属液-渣系，气泡的波动对液-液界面形状有很大影响。然后，可以观察到非线性变化的界面形状，这表明这种形状变得容易通过曲率的轻微变化而不稳定。
The transient behavior of the immiscible two liquids interface, which is initiated by the rising gas bubble was investigated using Smoothed Particle Hydrodynamics (SPH) model. This developed numerical method is using fully Lagrangian particle-based model, which can track the movement of both the gas and the liquid phase directly. Numerical simulations have been performed for different conditions corresponding to different values ofEönumber, and the predicted topological changes as well as the theoretical pressure and interfacial shape of bubbles are validated. In the case of immiscible two liquids, the column of a lower liquid phase penetrating into the upper liquid phase influences interface area, whose shape strongly depends on the wake flow pattern of a bubble. Thus, the dynamic balance between the buoyancy and the liquid-liquid interfacial tension determines an interface area. Under higher surface tension condition, such as molten metal-slag system, the liquid-liquid interface shape is greatly influenced by the fluctuation of a bubble. Then, non-linearly changed interface shape can be observed, indicating that this shape becomes easily unstable by slight change of the curvature.