Interface‐resolved simulations of normal collisions of spheres on a wet surface
Interface‐resolved simulations of normal collisions of spheres on a wet surface
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DOI：
10.1002/aic.15847
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发表时间：
2017-11
期刊：
影响因子：
3.7
通讯作者：
Yali Tang;Hans Kuipers;B. Buck;S. Heinrich;N. Deen
中科院分区：
文献类型：
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作者：
Yali Tang;Hans Kuipers;B. Buck;S. Heinrich;N. Deen
在液体存在下，单个颗粒碰撞的微观力学的详细知识对于建模/理解在自然界和工业应用中无所不在的湿颗粒流是至关重要的。尽管有许多报告的研究，非常有限的详细的界面解决这种碰撞问题的建模已经进行。本文提出了一种改进的模型，用于直接数值模拟球体与湿表面的正碰撞。该模型结合了浸入边界法和流体体积法，并辅以描述气液固接触线的模型。结果表明，我们的模型不仅正确地描述了湿颗粒的碰撞动力学，但也很好地捕捉碰撞过程中形成的液体桥的动力学。模拟结果和实验数据之间的定量协议。它的结论是，开发的模型构成了一个强大的工具，以补充实验研究，这是具有挑战性的更复杂的湿碰撞系统在实践中。本文受版权保护。All rights reserved.
Detailed knowledge of micro-mechanics of individual particle collisions in the presence of liquid is crucial for modelling/understanding of wet granular flows that are omnipresent in nature and industrial applications. Despite many reported studies, very limited detailed interface-resolved modelling of such collision problems has been conducted. This paper presents an improved model for direct numerical simulations of normal impacts of spheres on wet surfaces. This model combines the immersed boundary method and the volume-of-fluid method supplemented with a model describing gas-liquid-solid contact line. It is demonstrated that our model not only correctly describes the collision dynamics of wet particles, but also well captures the dynamics of the liquid bridge formed during the collision. Quantitative agreement is obtained between the simulation results and the experimental data. It is concluded that the developed model constitutes a powerful tool to complement experimental studies, which are challenging for more complex wet collision systems in practice. This article is protected by copyright. All rights reserved.