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サイトウ クニヤス
Kuniyasu Saitoh
齊藤 国靖 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2021 |
| 形態種別 | 研究論文 |
| 標題 | Sound damping in soft particle packings: the interplay between configurational disorder and inelasticity |
| 執筆形態 | その他 |
| 掲載誌名 | Soft Matter |
| 出版社・発行元 | Royal Society of Chemistry ({RSC}) |
| 巻・号・頁 | 17(15),pp.4204-4212 |
| 著者・共著者 | Kuniyasu Saitoh,Hideyuki Mizuno |
| 概要 | We numerically investigate sound damping in disordered two-dimensional soft particle packings. We simulate evolution of standing waves of particle displacements and analyze time correlation functions of particle velocities and power spectra. We control the strength of inelastic interactions between the particles in contact to show how the inelasticity affects anomalous sound characteristics of disordered systems: Increasing the strength of inelastic interactions, we find that (i) sound softening vanishes and (ii) attenuation coefficients exhibit a transition from the Rayleigh law to quadratic growth. We also report (iii) how the Ioffe-Regel limit frequencies depend on the strength of inelasticity as useful information for experiments and applications of the sound in disordered media. Our findings suggest that sound damping in soft particle packings is determined by the interplay between elastic heterogeneities and inelasticity. |
| DOI | 10.1039/D0SM02018D |
| ISSN | 1744-683X/1744-6848 |