Mass discharge rate of granular flow in eccentric silos with variable side wall friction

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2024-11-12 DOI:10.1016/j.powtec.2024.120438

Ge Sun , Quan Chen , Ran Li , Tongtong Mu , Hui Yang

引用次数: 0

Abstract

There are many studies on the effect of side wall friction on mass discharge rate (MDR), but the physical mechanism is lacking. In this paper, by changing side wall friction of eccentric silos, the relationship between macroscopic MDR and microscopic frictional coefficient was established, and the regulation of MDR up to a range of 40 % was realized. Furthermore, it is revealed that the variation of MDR is caused by the change in geometric structure of free-fall arch (FFA). In addition, the velocity of particles on FFA is the same under different MDR. The reason is that under high frictional coefficient, the gravitational potential energy of particles is more dissipated in the rotational motion caused by resistance. This work explains for the first time the mechanism of the frictional coefficient on MDR, and provides a data reference for improving the theoretical model of MDR.

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具有可变侧壁摩擦力的偏心料仓中颗粒流的质量排出率

关于侧壁摩擦对排料速率（MDR）影响的研究很多，但缺乏物理机制的研究。本文通过改变偏心筒仓的侧壁摩擦力，建立了宏观 MDR 与微观摩擦系数之间的关系，并实现了对 MDR 在 40% 范围内的调节。此外，研究还发现 MDR 的变化是由自由落体拱（FFA）几何结构的变化引起的。此外，在不同的 MDR 下，颗粒在 FFA 上的速度是相同的。这是因为在高摩擦系数条件下，颗粒的重力势能更多地耗散在由阻力引起的旋转运动中。该研究首次解释了摩擦系数对 MDR 的影响机理，为改进 MDR 理论模型提供了数据参考。

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.