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首页> 外文期刊>Advanced Powder Technology: The internation Journal of the Society of Powder Technology, Japan >Coupled DEM-SPH simulations of wet continuous screening
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Coupled DEM-SPH simulations of wet continuous screening

机译：耦合湿连续筛选的DEM-SPH模拟

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摘要

During screening, a liquid stream, besides the vibration, can be applied for the acceleration of the separation. The discrete element method coupled with the smoothed particle hydrodynamics (DEM-SPH) is used to numerically analyse wet continuous screening here. Within the applied DEM-SPH a new simple model for the representation of the screening surface is suggested in this study. In this model, the influence of the screening surface on the fluid is represented using external forces, which act on the SPH particles in close vicinity of the screen. A required validation of the DEM-SPH method for the analysis of a vibrated particle-laden system is performed by comparing obtained DEM-SPH results with the results derived using the DEM coupled with finite volume method. The performed simulations of dry and wet continuous screening demonstrate that flowing water, in most simulated cases, accelerates the separation of particles. The presented study demonstrates the potential of the coupled DEM-SPH method for the analysis of wet screening processes. To our best knowledge, the simulation of wet screening using a two-way coupled numerical DEM-SPH approach not resolving the flow around individual particles is demonstrated in the scientific literature for the first time. (C) 2019 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
机译：在筛选期间，除了振动之外，液体流可以应用于分离的加速度。与平滑粒子流体动力学（DEM-SPH）耦合的离散元件方法用于在此处分析湿连续筛选。在应用的DEM-SPH内，在本研究中提出了一种用于筛选表面表示的新简单模型。在该模型中，使用外力表示筛选表面对流体上的影响，该外力表示在屏幕附近的SPH颗粒上。通过使用使用DEM与有限体积法耦合的DEM耦合的结果，通过比较所需的DEM-SPH来执行用于分析振动粒子升起系统的DEM-SPH方法的所需验证。干湿连续筛选的表现模拟表明，流动的水在大多数模拟情况下加速颗粒的分离。本研究表明，耦合DEM-SPH方法的潜力用于分析湿筛分过程。为了我们的最佳知识，使用双向耦合数值DEM-SPH方法的湿筛分的模拟未解决单个颗粒周围的流动。 （c）2019年日本粉末技术学会。由elsevier b.v发表。和日本粉末科技会。版权所有。

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