Smiatek, J., Allen, M. P. and Schmid, F. (2008) Tunable-slip boundaries for coarse-grained simulations of fluid flow. European Physical Journal E. Soft Matter, Vol.26 (No.1-2). pp. 115-122. doi:10.1140/epje/i2007-10311-4

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Abstract

On the micro- and nanoscale, classical hydrodynamic boundary conditions such as the no-slip condition no longer apply. Instead, the flow profiles exhibit "slip" at the surface, which is characterized by a finite slip length (partial slip). We present a new, systematic way of implementing partial-slip boundary conditions with arbitrary slip length in coarse-grained computer simulations. The main idea is to represent the complex microscopic interface structure by a spatially varying effective viscous force. An analytical equation for the resulting slip length can be derived for planar and for curved surfaces. The comparison with computer simulations of a DPD (dissipative particle dynamics) fluid shows that this expression is valid from full slip to no slip.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics Q Science > QD Chemistry
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Fluid dynamics, Fluid dynamics -- Mathematical models, Mathematical physics
Journal or Publication Title:	European Physical Journal E. Soft Matter
Publisher:	Springer
ISSN:	1292-8941
Official Date:	May 2008
Dates:	Date Event May 2008 Published
Volume:	Vol.26
Number:	No.1-2
Number of Pages:	8
Page Range:	pp. 115-122
DOI:	10.1140/epje/i2007-10311-4
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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