中国物理B ›› 2019, Vol. 28 ›› Issue (3): 36102-036102.doi: 10.1088/1674-1056/28/3/036102

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Confinement-induced modulation of elastic properties of nano-confined fluids in slit pore

Zong-Li Sun(孙宗利), Yan-Shuang Kang(康艳霜), Yan-Mei Kang(康艳梅)   

  1. 1 Science and Technology College, North China Electric Power University, Baoding 071051, China;
    2 College of Science, Hebei Agricultural University, Baoding 071001, China;
    3 University of International Relations, Beijing 100091, China
  • 收稿日期:2018-10-29 修回日期:2019-01-16 出版日期:2019-03-05 发布日期:2019-03-05
  • 通讯作者: Zong-Li Sun, Yan-Shuang Kang E-mail:sunzl@ncepu.edu.cn;kang_yanshuang@163.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 21503077), the Fundamental Research Fund for the Central Universities of China (Grant No. 2016MS156), and the Research Project from Hebei Education Department, China (Grant No. QN2018119).

Confinement-induced modulation of elastic properties of nano-confined fluids in slit pore

Zong-Li Sun(孙宗利)1, Yan-Shuang Kang(康艳霜)2, Yan-Mei Kang(康艳梅)3   

  1. 1 Science and Technology College, North China Electric Power University, Baoding 071051, China;
    2 College of Science, Hebei Agricultural University, Baoding 071001, China;
    3 University of International Relations, Beijing 100091, China
  • Received:2018-10-29 Revised:2019-01-16 Online:2019-03-05 Published:2019-03-05
  • Contact: Zong-Li Sun, Yan-Shuang Kang E-mail:sunzl@ncepu.edu.cn;kang_yanshuang@163.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 21503077), the Fundamental Research Fund for the Central Universities of China (Grant No. 2016MS156), and the Research Project from Hebei Education Department, China (Grant No. QN2018119).

摘要:

Based on statistical mechanics for classical fluids, the general expressions for the elastic moduli of inhomogeneous fluid are derived and expressed as functionals of density functions. Within the framework of classical density functional theory, the bulk modulus of confined argon in slit pore is calculated under different conditions. The effects of vapor pressure, temperature, and pore width on modulus are calculated and investigated. Obvious confinement-induced effect has been observed in the confined argon. In addition, the solvation pressure dependence of the bulk modulus is also investigated, and the results suggest that the Tait-Murnaghan equation is still valid for the confined fluids.

关键词: elastic modulus, confinement-induced modulation, confined argon, density functional

Abstract:

Based on statistical mechanics for classical fluids, the general expressions for the elastic moduli of inhomogeneous fluid are derived and expressed as functionals of density functions. Within the framework of classical density functional theory, the bulk modulus of confined argon in slit pore is calculated under different conditions. The effects of vapor pressure, temperature, and pore width on modulus are calculated and investigated. Obvious confinement-induced effect has been observed in the confined argon. In addition, the solvation pressure dependence of the bulk modulus is also investigated, and the results suggest that the Tait-Murnaghan equation is still valid for the confined fluids.

Key words: elastic modulus, confinement-induced modulation, confined argon, density functional

中图分类号:  (Theory and models of liquid structure)

  • 61.20.Gy
62.10.+s (Mechanical properties of liquids)