Progress of computability of multi-scale interface problems in gas-liquid two-phase flow
Progress of computability of multi-scale interface problems in gas-liquid two-phase flow
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发表时间：
2014
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通讯作者：
Zhang Wenwe
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作者：
Zhang Wenwe
气液两相流具有复杂的界面结构，在瞬态时间内具有广泛的空间尺度，多尺度界面问题涉及到化工、核安全等诸多领域，其可计算性是研究的重点之一。本文分析了欧拉坐标系下处理相界面不连续性的基本模型，描述了湍流模拟方法与界面之间的影响关系，分析了两类多尺度问题的可计算性困难：分析了离散流中界面的尺度分布和混合流中界面的跨尺度分布，总结了影响跨尺度分布的两个因素，即计算网格的尺度和几何边界与物理边界的损失，介绍了跨尺度分布的计算方法和典型应用。综述了混合流中界面的多尺度问题，提出了多尺度问题的研究策略和发展趋势，为今后的研究提供了有益的指导。
Gas-liquid two-phase flow has complex interface structures with a wide range of spatial scales in the transient time.The multi-scale interface problems are related to various fields,such as chemical engineering,nuclear safety,and so on.Computability of these problems is one of the research priorities.This paper analyzes basic models dealing with the discontinuity of phase interfaces in the Eulerian reference frame,and describes the influence relationship between turbulent simulation methods and interfaces.The difficulties of computability are analyzed for two types of multi-scale problems:scale distribution of interfaces in dispersed flows and cross-scale of interfaces in mixed flow.Two factors including the scale for computational grid and the loss of geometry and physical boundaries are concluded.The computing methods and typical applications in cross-scale of interfaces in mixed flow are summarized.The strategies and trends of the research on those multi-scale problems are proposed,providing useful guides for the research.