On molecular and continuum boundary conditions for a miscible binary fluid

Preprint

7 September 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0105383

Abstract

We show that molecular dynamics simulations can furnish useful boundary conditions at a solid surface bounding a two-component fluid. In contrast to some previous reports, convective-diffusive flow is consistent with continuum equations down to atomic scales. However, concentration gradients can produce flow without viscous dissipation that is inconsistent with the commonly used Navier slip condition. Also, differential wetting of the two components coupled to a concentration gradient can drive convective flows that could be used to make nano-pumps or motors.

Keywords

MOLECULAR DYNAMICS SIMULATIONS
CONCENTRATION GRADIENT
FLOW WITHOUT VISCOUS
BOUNDARY CONDITIONS
CONTINUUM BOUNDARY
MISCIBLE BINARY
BINARY FLUID
FLUID

All Related Versions

Version 1, 2001-05-19, ArXiv
Version 2, 2001-09-07, ArXiv
Published version: Physical Review Letters, 87 (17), 178302.

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