Discrete numerical analysis of cohesive granular flow in a thin rotating drum: Flow regimes and cohesion estimation

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-10-09 DOI:10.1016/j.powtec.2025.121723

Riccardo Artoni , Benoît Jabaud , Antonio Pol , Patrick Richard , Erwan Le Menn , Gabriel Tobie

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引用次数: 0

Abstract

In this study, we investigate the rheological behavior of cohesive granular flows within a rotating drum geometry using discrete element method (DEM) simulations. By systematically varying particle size, cohesion, and stiffness, we identify the emergence of distinct flow regimes—consistent with prior experimental observations. While the transitions between these regimes are primarily governed by cohesion, particle stiffness is also shown to significantly influence flow dynamics.

To interpret the numerical results, we employ a dimensional analysis rooted in the physics of adhesive particle collisions. This analysis provides a conceptual framework for the remainder of the paper, which explores how “upscaled” discrete simulations can replicate experimental findings and help infer interparticle contact properties such as the adhesive surface energy. Notably, we use it to examine rotating drum experiments involving a unique class of granular materials, ice powders, which holds particular relevance in planetary science applications, and which flowability was shown to be strongly temperature-dependent.

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薄转鼓内粘性颗粒流动的离散数值分析：流动形式和粘性估计

在这项研究中，我们使用离散元法（DEM）模拟研究了旋转鼓几何结构中粘性颗粒流的流变行为。通过系统地改变颗粒大小、凝聚力和刚度，我们确定了不同流动状态的出现——与先前的实验观察一致。虽然这些状态之间的转换主要由内聚控制，但颗粒刚度也显示出对流动动力学的显着影响。为了解释数值结果，我们采用了基于粘性粒子碰撞物理学的量纲分析。这一分析为本文的其余部分提供了一个概念框架，探讨了“升级”离散模拟如何复制实验结果，并帮助推断粒子间接触特性，如粘附表面能。值得注意的是，我们用它来检查旋转鼓实验，涉及一种独特的颗粒材料，冰粉，这在行星科学应用中具有特别的相关性，其流动性被证明与温度密切相关。

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

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.