Unveiling the role of self-propulsion intensity in the ascent dynamics of an intruder in granular media

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-07-21 DOI:10.1016/j.powtec.2025.121424

Jian Bai , Jian Li , Shibo Wang , Qijun Zheng , Aibing Yu , Xinmeng Ma , Guangyang Hong

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引用次数: 0

Abstract

Self-propulsion intruders in granular media are relevant to both engineering applications, such as powder mixing blades, and natural systems, like sand-swimming lizards. The dynamics of self- propulsion intruders in particles, particularly under non-preset displacements, have received relatively little attention. In this study, we realized a self-propulsion cylindrical intruder using an eccentric rotor module and experimentally investigated its ascent in granular media under various vibration conditions. Our combined experimental and discrete element method simulation results show that the ratio of force amplitude to frequency effectively defines the self-propulsion intensity. This work elucidates the linear correlation between the intruder's ascent rate and self-propulsion intensity, and reveals the mechanism behind its upward motion. We further propose a model based on mass flow rate that describes the dynamics of the ascent, with experimental results in good agreement. This work offers a new perspective for understanding self-propulsion behavior in granular systems and provides theoretical support for the design of bio-inspired locomotion mechanisms.

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揭示自推进强度在颗粒介质中入侵者上升动力学中的作用

颗粒介质中的自推进入侵者既适用于工程应用，如粉末混合叶片，也适用于自然系统，如沙游蜥蜴。粒子中自推进入侵者的动力学，特别是在非预设位移下，得到的关注相对较少。在本研究中，我们利用偏心转子模块实现了一种自推进圆柱形入侵者，并对其在不同振动条件下在颗粒介质中的上升进行了实验研究。实验与离散元法相结合的仿真结果表明，力幅与频率的比值有效地定义了自推进强度。本研究阐明了入侵者的上升速率与自推进强度之间的线性关系，揭示了其向上运动的机制。我们进一步提出了一个基于质量流量的模型来描述上升的动力学，与实验结果吻合得很好。这项工作为理解颗粒系统的自推进行为提供了新的视角，并为仿生运动机制的设计提供了理论支持。

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.