0
research-article

A study on slip characteristics using hybrid particle-continuum method

[+] Author and Article Information
Jiandong Yang

Department of Modern Mechanics University of Science and Technology of China China, Hefei 230027
yjdjjy@mail.ustc.edu.cn

ZhenHua Wan

Department of Modern Mechanics University of Science and Technology of China China, Hefei 230027
wanzh@ustc.edu.cn

Liang Wang

Department of Modern Mechanics University of Science and Technology of China China, Hefei 230027
alanwang@mail.ustc.edu.cn

DeJun Sun

Department of Modern Mechanics University of Science and Technology of China China, Hefei 230027
dsun@ustc.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4039862 History: Received November 08, 2017; Revised March 25, 2018

Abstract

An effective boundary potential has been proposed to solve non-periodic boundary condition (NPBC) of hybrid method. The optimized hybrid method is applied to investigate the influences of the channel height and solid-liquid interaction parameters on slip characteristics of Couette flows in micro/nanochannels. By changing the channel height, we find that the relative slip lengths show the obvious negative correlation with the channel height and fewer density oscillations are generated near the solid wall in the larger channel height. Moreover, we continue to investigate the solid-liquid interaction parameters, including the solid-liquid energy scales ratio (C1) and solid-liquid size scales ratio (C2). The results show that the solid-liquid surface changes from hydrophobic to hydrophilic with the increase of C1, the arrangement of liquid particles adjacent to the solid particles is more disorganized over the hydrophobic solid-liquid surface compared with the hydrophilic surface, and the probability of the liquid particles appear near the solid particles becomes smaller. Meanwhile, the relative slip lengths are minimum when the liquid and solid particles have the same diameter. Furthermore, the relative slip lengths follow a linear relationship with the shear rate when the solid-liquid interaction parameters change. The plenty computational time has been saved by the present hybrid method compared with the full molecular dynamics simulation (FMD) in this paper.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In