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   准教授
言語種別 英語
発行・発表の年月 2015
形態種別 研究論文
査読 査読あり
標題 Hydrodynamic instabilities in shear flows of dry cohesive granular particles
執筆形態 その他
掲載誌名 Soft Matter
出版社・発行元 ROYAL SOC CHEMISTRY
巻・号・頁 11(32),pp.6371-6385
著者・共著者 Saitoh, K.,Takada, S.,Hayakawa, H.
概要 We extend the dynamic van der Waals model introduced by A. Onuki [Phys. Rev. Lett., 2005, 94, 054501] to the description of cohesive granular flows under a plane shear to study their hydrodynamic instabilities. By numerically solving the dynamic van der Waals model, we observed various heterogeneous structures of density fields in steady states, where the viscous heating is balanced with the energy dissipation caused by inelastic collisions. Based on the linear stability analysis, we found that the spatial structures are determined by the mean volume fraction, the applied shear rate, and the inelasticity, where the instability is triggered if the system is thermodynamically unstable, i.e. the pressure, p, and the volume fraction, phi, satisfy partial derivative p/partial derivative phi < 0.
DOI 10.1039/c5sm01160d
ISSN 1744-683X/1744-6848
Put Code(ORCID) 64873720
PermalinkURL http://www.scopus.com/inward/record.url?eid=2-s2.0-84938702976&partnerID=MN8TOARS
researchmap用URL http://orcid.org/0000-0002-3511-2710