Cartesian Cut-Cell and GFM Approaches to Free-Surface and Moving Boundary Interaction
Cartesian Cut-Cell and GFM Approaches to Free-Surface and Moving Boundary Interaction
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DOI：
10.2514/6.2016-0602
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发表时间：
2016-01
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影响因子：
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通讯作者：
W. P. Bennett;L. Michael;N. Nikiforakis
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文献类型：
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作者：
W. P. Bennett;L. Michael;N. Nikiforakis
两相不混相流体流动的精确数值模拟具有广泛的实际工程应用价值。实例包括空间飞行器或汽车/飞机燃料箱中的燃料封闭和液体晃动、车辆涉水、航海液体封闭、船舶水动力学和水溅现象。本文致力于发展数值方法来模拟这类流动，这些流动也涉及边界运动，例如集装箱车辆运动、固体物体的自由面侵彻或油箱碰撞模型。为此，我们实现了两相模型与两种网格生成和网格移动的现代方法的耦合，即量纲分裂的笛卡尔割格法和黎曼鬼流方法。在自由表面液体流动与固体结构相互作用的背景下，比较了这两种方法的相对优点。
The accurate numerical modelling of two-phase, immiscible fluid flows is of interest to a wide range of practical engineering applications. Examples include fuel containment and liquid sloshing in space vehicles or automotive/aircraft fuel tanks, vehicle wading, nautical liquid containment, ship hydrodynamics and water splash phenomena. This paper is concerned with the development of numerical methodologies for the simulation of such flows which also involve boundary movement, e.g. container vehicle movement, free surface penetration by a solid object, or fuel tank impact modelling. To this end we implement the coupling of a two-phase model with two contemporary methods for mesh generation and mesh movement, namely a dimensionally-split Cartesian cut-cell method and a Riemann ghost-fluid method. The relative merits of the two approaches are compared in the context of free surface liquid flows interacting with solid structures.