| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Effect of the confinement on two-dimensional complex plasmas with the shear force |
| Haoyu Qi(齐颢与)1,2,†, Yang Liu(刘阳)1,3,†, Shaohuang Bian(卞少皇)4, Runing Liang(梁儒宁)1, Dan Zhang(张丹)1, and Feng Huang(黄峰)1,‡ |
1 College of Science, China Agricultural University, Beijing 100083, China;
2 Office for Science and Technology, Northwest University, Xi'an 710069, China;
3 Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universit?t, D-24098 Kiel, Germany;
4 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China |
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Abstract Langevin molecular dynamics simulations reveal the impact of confinement strength on the structure and dynamics of a two-dimensional complex plasma under constant shear force. Structural analysis via Voronoi diagrams and the local bond-order parameter $|\varPsi_6|$ shows that stronger confinement enhances hexagonal order and mitigates shear-induced disorder. Dynamical properties, determined by mean-square displacement (MSD) and the velocity autocorrelation function (VACF), indicate that the shear-induced superdiffusion weakens with increasing confinement strength. The entropy change ($\Delta{S}$) shows that strong confinement ($\omega > 1$) balances particle dynamics between shear and shear-free regions, thereby stabilizing the system. These findings highlight the interplay between confinement and shear force.
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Received: 26 February 2025
Revised: 04 July 2025
Accepted manuscript online: 18 July 2025
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PACS:
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52.27.Lw
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(Dusty or complex plasmas; plasma crystals)
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83.50.Ax
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(Steady shear flows, viscometric flow)
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05.10.Gg
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(Stochastic analysis methods)
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52.58.Qv
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(Electrostatic and high-frequency confinement)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 12075315). |
Corresponding Authors:
Feng Huang
E-mail: 05033@cau.edu.cn
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Cite this article:
Haoyu Qi(齐颢与), Yang Liu(刘阳), Shaohuang Bian(卞少皇), Runing Liang(梁儒宁), Dan Zhang(张丹), and Feng Huang(黄峰) Effect of the confinement on two-dimensional complex plasmas with the shear force 2025 Chin. Phys. B 34 105203
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