An extension of the hard-sphere particle–particle collision model to study agglomeration
An extension of the hard-sphere particle–particle collision model to study agglomeration
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DOI：
10.1016/j.ces.2010.02.012
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发表时间：
2010-05
影响因子：
4.7
通讯作者：
P. Kosinski;A. Hoffmann
中科院分区：
文献类型：
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作者：
P. Kosinski;A. Hoffmann
在进行欧拉-拉格朗日粒子流体流动模拟时，需要考虑粒子之间的碰撞。其中一种方法是硬球模型。然而，这个模型没有考虑到颗粒之间的内聚力，因此它不能模拟真实流动的许多方面，比如团块的形成。文献中有一些尝试处理颗粒流动模拟中的内聚力，但这些方法实际上都没有直接实现到硬球模型中，而是作为数值方案的一部分单独求解。在本文中，我们展示了如何将标准的硬球模型以一种有效和适当的方式扩展以包含这些重要的相互作用。详细介绍了扩展模型，并给出了一些数值结果。
When performing Eulerian–Lagrangian simulations of particle–fluid flows collisions between the particles need to be accounted for. One of the methods used for this is the hard-sphere model. This model, however, does not take into account cohesive forces between the particles, and for this reason it is not able to simulate many aspects of real flows, such as the formation of agglomerates. There have been some attempts in literature to treat cohesive forces in simulations of particulate flows but none of these methods were actually implemented directly into the hard-sphere model but rather have been solved separately as a part of the numerical scheme. In this paper we show how the standard hard-sphere model may be extended to include these important interactions in an efficient and proper way. The extended model is presented in detail and some numerical results are shown.