ePubs
The open archive for STFC research publications
Home
About ePubs
Content Policies
News
Help
Privacy/Cookies
Suggest an Enhancement
Contact ePubs
Full Record Details
Persistent URL
http://purl.org/net/epubs/work/11164411
Record Status
Checked
Record Id
11164411
Title
On the degree of boundary slip over nonplanar surfaces
Contributors
A Dinler (Istanbul Medeniyet U., Turkey)
,
RW Barber (STFC Daresbury Lab.)
,
DR Emerson (STFC Daresbury Lab.)
,
SK Stefanov (Bulgarian Acad. Sci.)
,
K Orucoglu (Istanbul Medeniyet U., Turkey)
Abstract
The breakdown of the no-slip boundary condition at a fluid–solid interface has been recognized in micro/nanofluidics for many years. However, the relationship between the curvature of the surface and the degree of boundary slip has not been understood sufficiently well. The present study reveals that the degree of slip depends effectively on the surface curvature, which is having an opposing effect over rotating concave and convex surfaces. The results show that as surface curvature increases, the boundary slip becomes negligible over a concave surface, while it becomes increasingly important over a convex surface. In addition, boundary slip formulae are proposed that can accurately predict the boundary slips over convex and concave surfaces. These formulae are found to be in very good agreement with DSMC data for a range of accommodation coefficients and boundary curvatures. The present study then explains the mechanism of the intriguing phenomenon of velocity inversion which has, until the present study, often been mistakenly attributed solely to the effects of boundary curvature.
Organisation
STFC
,
SCI-COMP
,
SCI-COMP-EE
Keywords
Boundary slip
,
Velocity inversion
,
Curvature effects
,
Gas microflows
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Microfluid Nanofluid
15, no. 6 (2013): 807-816.
doi:10.1007/s10404-013-1183-z
2013
Showing record 1 of 1
Recent Additions
Browse Organisations
Browse Journals/Series
Login to add & manage publications and access information for OA publishing
Username:
Password:
Useful Links
Chadwick & RAL Libraries
SHERPA FACT
SHERPA RoMEO
SHERPA JULIET
Journal Checker Tool
Google Scholar