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Chin. Phys. B, 2019, Vol. 28(3): 036102    DOI: 10.1088/1674-1056/28/3/036102
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

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 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
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.

Keywords:  elastic modulus      confinement-induced modulation      confined argon      density functional  
Received:  29 October 2018      Revised:  16 January 2019      Accepted manuscript online: 
PACS:  61.20.Gy (Theory and models of liquid structure)  
  62.10.+s (Mechanical properties of liquids)  
Fund: 

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).

Corresponding Authors:  Zong-Li Sun, Yan-Shuang Kang     E-mail:  sunzl@ncepu.edu.cn;kang_yanshuang@163.com

Cite this article: 

Zong-Li Sun(孙宗利), Yan-Shuang Kang(康艳霜), Yan-Mei Kang(康艳梅) Confinement-induced modulation of elastic properties of nano-confined fluids in slit pore 2019 Chin. Phys. B 28 036102

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