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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Comparison between longitudinal viscoelastic relaxation and sound dispersion of molecular liquids on the molecular scale

http://hdl.handle.net/2237/0002004223
http://hdl.handle.net/2237/0002004223
f490301d-b629-48c1-9105-e81c5a970134
名前 / ファイル ライセンス アクション
5_0098098.pdf 5_0098098.pdf (5.2 MB)
Item type itemtype_ver1(1)
公開日 2022-11-29
タイトル
タイトル Comparison between longitudinal viscoelastic relaxation and sound dispersion of molecular liquids on the molecular scale
言語 en
著者 Yamaguchi, Tsuyoshi

× Yamaguchi, Tsuyoshi

en Yamaguchi, Tsuyoshi

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 Copyright 2022 Author(s). Published under an exclusive license by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.The following article appeared in (J. Chem. Phys. 156, 244505 (2022)) and may be found at (https://doi.org/10.1063/5.0098098).
内容記述
内容記述タイプ Abstract
内容記述 Molecular dynamics simulation on some molecular liquids was performed to study sound dispersion on the molecular scale. The sound velocity was determined from the intermediate scattering function, and the relation between the longitudinal modulus and frequency was compared with the frequency-dependent longitudinal modulus in the q = 0 limit evaluated by the Kubo–Green theory. The sound dispersion of a monoatomic liquid up to qσ ≅ 2 was almost quantitatively explained by the viscoelasticity in the q = 0 limit when the wavenumber dependence of the heat capacity ratio was taken into account. The situation was similar for a polyatomic molecular liquid for which the intramolecular degrees of freedom were fixed. For a polyatomic liquid with intramolecular degrees of freedom, the sound dispersion on the molecular scale was connected to the high-frequency limit of the ultrasonic relaxation mode assigned to the vibrational energy relaxation. After subtracting the contribution of the vibrational energy relaxation, both the longitudinal viscoelasticity and the sound dispersion depended little on the presence of intramolecular degrees of freedom.
言語 en
出版者
出版者 AIP Publishing
言語 en
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1063/5.0098098
収録物識別子
収録物識別子タイプ PISSN
収録物識別子 0021-9606
書誌情報 en : The Journal of Chemical Physics

巻 156, 号 24, p. 244505, 発行日 2022-06-29
ファイル公開日
日付 2023-06-29
日付タイプ Available
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