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Effect of Liquid-Solid Interaction on Liquid Transport Properties in a Nanometer Capillary Tube

[+] Author Affiliations
Cunkui Huang, K. Nandakumar, Daniel Y. Kwok

University of Alberta, Edmonton, AB, Canada

Paper No. ICMM2005-75178, pp. 621-626; 6 pages
doi:10.1115/ICMM2005-75178
From:
  • ASME 3rd International Conference on Microchannels and Minichannels
  • ASME 3rd International Conference on Microchannels and Minichannels, Part B cont’d
  • Toronto, Ontario, Canada, June 13–15, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4185-5 | eISBN: 0-7918-3758-0
  • Copyright © 2005 by ASME

abstract

In the present paper, molecular dynamics is applied to study the effect of interaction between liquid-solid on liquid transport properties, especially a stagnant layer to a slip layer, in a circular nano tube under a constant injection flow rate boundary condition. In simulations, a full 12-6 Lennard-Jones potential, truncated at 2.2σ, is used to govern the interaction between liquid-liquid and liquid-solid molecules. Six cases with different interactions (or energy scales) between liquid-solid are carried out. The non-equilibrium molecular dynamics (NEMD) simulation results show that the interaction between liquid-solid causes a wavelike density distribution in normal wall direction and the amplitude of wave is proportional to the interaction between liquid-solid; the interaction between liquid-solid dominates the motion of first liquid layer close to the solid substrate, i.e., the strong interaction between liquid-solid can result in the a stagnant layer; the weak interaction between liquid-solid produces a slip layer and the intermediate interaction between liquid-solid made a slip and sub-slip layers.

Copyright © 2005 by ASME

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