The European Physical Journal E

, 38:127

The importance of chemical potential in the determination of water slip in nanochannels

Regular Article

DOI: 10.1140/epje/i2015-15127-y

Cite this article as:
Sega, M., Sbragaglia, M., Biferale, L. et al. Eur. Phys. J. E (2015) 38: 127. doi:10.1140/epje/i2015-15127-y
Part of the following topical collections:
  1. Multi-scale phenomena in complex flows and flowing matter

Abstract.

We investigate the slip properties of water confined in graphite-like nanochannels by non-equilibrium molecular dynamics simulations, with the aim of identifying and analyze separately the influence of different physical quantities on the slip length. In a system under confinement but connected to a reservoir of fluid, the chemical potential is the natural control parameter: we show that two nanochannels characterized by the same macroscopic contact angle --but a different microscopic surface potential-- do not exhibit the same slip length unless the chemical potential of water in the two channels is matched. Some methodological issues related to the preparation of samples for the comparative analysis in confined geometries are also discussed.

Graphical abstract

Keywords

Topical Issue: Multi-scale phenomena in complex flows and flowing matter 

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Institute of Computational PhysicsUniversity of ViennaViennaAustria
  2. 2.Department of Physics and INFNUniversity of “Tor Vergata”RomeItaly
  3. 3.Istituto per le Applicazioni del Calcolo CNRRomeItaly

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