Convection and motion characteristics of granular media in horizontal vibratory finishing

IF 2.3 3区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Granular Matter Pub Date : 2023-09-14 DOI:10.1007/s10035-023-01366-3

Jiaming Wang, Xiuhong Li, Wenhui Li, Siyuan Cheng, Hao Li, Shengqiang Yang

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Abstract

To explore the characteristics of the flow field and the movement of granular media in horizontal vibration, the motion behavior of granular media was studied based on the horizontal vibratory finishing blade process. The evolution of the fluidization process of granular media under different frequencies and amplitudes was analyzed. The relationship between granular media's long-term and short-term movements and their effects was clarified. And the results were verified by PIV technology. The results show that increasing the frequency and amplitude can improve the fluidization degree of the particle system. Moreover, increasing the amplitude is more effective than frequency. Due to the blade's obstruction, the flow field's characteristic is an asymmetric double rolls. Granular media's macro-movement is divided into long-term and short-term motion based on particles' movement characteristics. The short-term motion of granular media mainly realizes the polishing and finishing of the blade, while the long-term motion realizes the renewal and replacement of granular media. The long-term and short-term movements are positively correlated. This study provides a reference for selecting process parameters and regulating particle flow fields in horizontal vibration.

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颗粒介质在水平振动整理中的对流及运动特性

为探索水平振动下颗粒介质的流场及运动特性，基于水平振动精加工叶片过程，研究了颗粒介质的运动特性。分析了不同频率和振幅下颗粒介质流化过程的演化规律。阐明了颗粒介质长期和短期运动及其影响的关系。并通过PIV技术对结果进行了验证。结果表明，增加频率和振幅可以提高颗粒系统的流化程度。此外，增加振幅比增加频率更有效。由于叶片的阻碍，流场表现为非对称双辊流。根据颗粒的运动特性，将颗粒介质的宏观运动分为长期运动和短期运动。颗粒介质的短期运动主要实现叶片的抛光和精加工，而长期运动则实现颗粒介质的更新和更换。长期和短期走势呈正相关。该研究为水平振动过程中工艺参数的选择和颗粒流场的调节提供了参考。图形抽象

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来源期刊

Granular Matter Materials Science-General Materials Science

CiteScore

4.60

自引率

8.30%

发文量

审稿时长

6 months

期刊介绍： Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science. These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations. >> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa. The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.