A Stokesian dynamics approach for simulation of magnetic particle suspensions
A Stokesian dynamics approach for simulation of magnetic particle suspensions
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DOI：
10.1016/j.mineng.2015.10.015
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发表时间：
2016-05
影响因子：
4.8
通讯作者：
A. Sand;Jan F. Stener;M. Toivakka;J. Carlson;Bertil I. Pålsson
中科院分区：
文献类型：
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作者：
A. Sand;Jan F. Stener;M. Toivakka;J. Carlson;Bertil I. Pålsson
μm级铁磁颗粒在悬浮液中的动态行为对各种选矿工艺具有重要意义。然而，在粒子水平上对这种过程进行实验研究是困难的。在这些情况下，采用合适的粒子模拟方法是有利的。斯托克动力学是一种无网格的数值技术，用于纳米到毫米大小的颗粒悬浮液。该方法本身考虑了水动力相互作用，但根据所研究的系统，可以包括额外的相互作用模型。我们在这里提出了一个斯托克动力学（SD）实现，它允许在存在外部磁场的情况下模拟悬浮磁性颗粒的运动。磁相互作用模型包括粒子-场相互作用和磁化粒子之间的成对相互作用。仿真结果与实验结果进行了比较。结果表明，该方法对研究铁磁悬浮液在选矿中的应用是可行的，并可用于了解和预测选矿过程的效率。
The dynamic behaviour of μm-scale ferromagnetic particles in suspension is of interest for various mineral beneficiation processes. It is, however, difficult to experimentally study such processes at the particle-level. In these instances it can be advantageous to resort to suitable particle simulation methods.Stokesian dynamics is a mesh-free numerical technique developed for suspensions of nm to mm size particles. The method inherently considers hydrodynamic interactions, but additional interaction models can be included depending on the system under investigation. We here present a Stokesian dynamics (SD) implementation, which allows for simulation of the motion of suspended magnetic particles in presence of an external magnetic field. The magnetic interaction model includes particle-field interactions as well as pairwise interactions between magnetised particles.Simulations are compared with experiments using a laboratory-scale flow cell. The method is shown to be realistic for studying ferromagnetic suspensions in mineral processing applications, and can be useful in understanding and predicting the efficiency of mineral separation processes.