Validation of DEM simulations for a drum-type agitation mill using particle velocities measured by 3D PTV

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2024-11-04 DOI:10.1016/j.apt.2024.104693

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Abstract

We found that the impact energy calculated by discrete element method (DEM) simulation can be used to explain the liberation of materials from electronic scrap (e-scrap) in a previous study; however, the absolute value of the impact energy had not been validated. Thus, we attempted to confirm the reliability by considering the particle velocity, which is highly related to impact energy. The comminution experiment was conducted using a drum-type agitation mill, and the particle velocity was measured by 3D particle tracking velocimetry (PTV) based on moving body analysis. The particle velocities for both the DEM simulation and PTV were compared for two types of particles, a non-breakable steel component and a connecting component that represents a breakable form of e-scrap. As a result, the particle velocities obtained from the two methods were within a relative error of 10% for the steel component, and thus the reliability of the impact energy was indirectly confirmed. In contrast, for the connecting component, the particle velocity from the DEM simulations was more than 50% higher, suggesting the influence of fracture energy. By calibrating the DEM simulation based on the particle velocity from PTV, the energy efficiency of fracture was estimated to be approximately 60%.

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利用 3D PTV 测量的颗粒速度验证滚筒式搅拌磨机的 DEM 模拟

我们在之前的研究中发现，离散元素法（DEM）模拟计算出的冲击能量可以用来解释电子废料（e-scrap）中材料的释放；但是，冲击能量的绝对值尚未得到验证。因此，我们尝试通过考虑与冲击能量高度相关的颗粒速度来确认其可靠性。粉碎实验是使用鼓式搅拌磨进行的，颗粒速度是通过基于移动体分析的三维颗粒跟踪测速仪（PTV）测量的。DEM 模拟和 PTV 的颗粒速度针对两种类型的颗粒进行了比较，一种是不可破碎的钢部件，另一种是代表电子废料可破碎形式的连接部件。结果显示，对于钢制部件，两种方法得出的颗粒速度相对误差在 10%以内，从而间接证实了冲击能量的可靠性。相反，对于连接部件，DEM 模拟得出的颗粒速度要高出 50%以上，这表明断裂能量的影响。根据 PTV 的颗粒速度对 DEM 模拟进行校准，估计断裂能量效率约为 60%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)