Pseudo-Particle Modeling (PPM)-a particle approach we proposed (Ge and Li, 1996)-is discussed further and applied to the simulation of particle-fluid flows. Existent simulation approaches for these flows are reviewed first, from which we conclude that to improve these approaches, understanding of microscopic flow behavior is necessary, and particle approaches (PA) are suitable tools for this purpose. Compared with other PA, th advantages of PPM lies in that all necessities on the molecular level for comprehensive flow description are maintained but it is still suitable to massive parallel processing and affordable for contemporary computers. A series of 2D simulations in PPM, including that of the flow around a single cylinder, of flow past static particles and of solids clustering in originally uniform suspension are carried out, which demonstrates how microscopic flow behavior leads to the macro-scale heterogeneity in particle-fluid systems. Future developments in this field are also suggested in the article.
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机译:伪粒子建模(PPM)-我们提出的一种粒子方法(Ge and Li,1996)-进一步讨论并应用于粒子流的模拟。首先回顾了这些流动的现有模拟方法,从中我们得出结论,要改进这些方法,必须了解微观流动行为,而粒子方法(PA)是实现此目的的合适工具。与其他PA相比,PPM的优势在于可以保留分子水平上进行全面流动描述的所有必要条件,但它仍然适合大规模并行处理,并且对于现代计算机而言价格可承受。在PPM中进行了一系列2D模拟,包括围绕单个圆柱体的流动,通过静态粒子的流动以及最初均匀悬浮液中的固体聚集的模拟,这证明了微观流动行为如何导致粒子中的宏观异质性-流体系统。本文还建议了该领域的未来发展。
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