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Hydrodynamics of moving contact lines: macroscopic versus microscopic

Lukyanov, A. V. and Pryer, T. (2017) Hydrodynamics of moving contact lines: macroscopic versus microscopic. Langmuir, 33 (34). pp. 8582-8590. ISSN 0743-7463

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To link to this item DOI: 10.1021/acs.langmuir.7b02409

Abstract/Summary

The fluid-mechanics community is currently divided in assessing the boundaries of applicability of the macroscopic approach to fluid mechanical problems. Can the dynamics of nano-droplets be described by the same macroscopic equations as the ones used for macro-droplets? To the greatest degree, this question should be addressed to the moving contact-line problem. The problem is naturally multiscale, where even using a slip boundary condition results in spurious numerical solutions and transcendental stagnation regions in modelling in the vicinity of the contact line. In this publication, it has been demonstrated through the mutual comparison between macroscopic modelling and molecular dynamics simulations that a small, albeit natural, change in the boundary conditions is all that is necessary to completely regularize the problem and eliminate these nonphysical effects. The limits of macroscopic approach applied to the moving contact-line problem have been tested and validated from the first microscopic principles of molecular dynamic simulations.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Mathematics and Statistics
ID Code:72083
Publisher:American Chemical Society

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