Theoretical predictions of viscosity ofmethane under confined conditions☆

doi:10.1016/j.cjche.2016.04.009

›› 2016, Vol. 24 ›› Issue (7): 904-908.DOI: 10.1016/j.cjche.2016.04.009

• Chemical Engineering Thermodynamics • 上一篇下一篇

Theoretical predictions of viscosity ofmethane under confined conditions☆

Yingying Liu, Di Zhou, Wancheng Zhu

Department of Chemical Engineering, Qufu Normal University, Qufu 273165, China

收稿日期:2016-01-12 修回日期:2016-04-06 出版日期:2016-07-28 发布日期:2016-08-17
通讯作者: Di Zhou, Wancheng Zhu
基金资助:
Supported by the National Natural Science Foundation of China (21506114, 21276141), the Excellent Middle-Aged and Young Scientist Award Foundation of Shandong (BS2014CL034) and Scientific Research Foundation of Qufu Normal University (BSQD20130116).

Theoretical predictions of viscosity ofmethane under confined conditions☆

Yingying Liu, Di Zhou, Wancheng Zhu

Department of Chemical Engineering, Qufu Normal University, Qufu 273165, China

Received:2016-01-12 Revised:2016-04-06 Online:2016-07-28 Published:2016-08-17
Supported by:
Supported by the National Natural Science Foundation of China (21506114, 21276141), the Excellent Middle-Aged and Young Scientist Award Foundation of Shandong (BS2014CL034) and Scientific Research Foundation of Qufu Normal University (BSQD20130116).

摘要/Abstract

摘要： Density functional theory has been confirmed as a reliable approach in the descriptions of inhomogeneous fluids. By integrating the density functional theory into the revised local average density model, a theoretical approach is constructed to investigate the local shear viscosity in the confined conditions. In the density functional theory, the weighted density approximation for attractive part and the modified fundamental measure theory for repulsion contribution are adopted to accurately describe the inhomogeneous systems. By comparingwith simulation data, the theoretical model is tested. In this work, the shear viscosities of methane are calculated in different external fields (on a hard wall, a solvophobicwall and in slit pores with different widths). In addition, the effects of temperature on the local density and viscosity are also considered. It shows that the effect of temperature on the shear viscosity ismore obvious on solid surfaces. The calculation provides an approach to determine the viscosity under confined conditions, which is extremely significant in real industrial applications.

关键词: Viscosity, Methane, Statistical thermodynamics

Abstract: Density functional theory has been confirmed as a reliable approach in the descriptions of inhomogeneous fluids. By integrating the density functional theory into the revised local average density model, a theoretical approach is constructed to investigate the local shear viscosity in the confined conditions. In the density functional theory, the weighted density approximation for attractive part and the modified fundamental measure theory for repulsion contribution are adopted to accurately describe the inhomogeneous systems. By comparingwith simulation data, the theoretical model is tested. In this work, the shear viscosities of methane are calculated in different external fields (on a hard wall, a solvophobicwall and in slit pores with different widths). In addition, the effects of temperature on the local density and viscosity are also considered. It shows that the effect of temperature on the shear viscosity ismore obvious on solid surfaces. The calculation provides an approach to determine the viscosity under confined conditions, which is extremely significant in real industrial applications.

Key words: Viscosity, Methane, Statistical thermodynamics

Yingying Liu, Di Zhou, Wancheng Zhu. Theoretical predictions of viscosity ofmethane under confined conditions☆[J]. , 2016, 24(7): 904-908.

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Theoretical predictions of viscosity ofmethane under confined conditions☆

Theoretical predictions of viscosity ofmethane under confined conditions☆

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