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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/34601
Record Status
Checked
Record Id
34601
Title
Velocity slip in microscale cylindrical Couette flow : The Langmuir model
Contributors
RS Myong (Strathclyde U. and Gyeongsang National U., Chinju)
,
JM Reese (Strathclyde U.)
,
RW Barber (CCLRC Daresbury Lab.)
,
DR Emerson (CCLRC Daresbury Lab.)
Abstract
The velocity slip on the solid surfaces of microscale cylindrical Couette flow is investigated using the Langmuir adsorption model for the gas-surface molecular interaction. The accommodation coefficient in the Maxwell model, which is a free parameter based on the concept of diffusive reflection, is replaced by a physical parameter of heat adsorption in the Langmuir model. The phenomenon of velocity inversion is then clearly explained by introducing a velocity polar on the hodograph plane. It is also shown that the quantity used to determine the momentum slip in a concentric cylindrical geometry should be based upon the angular velocity, not the velocity itself. Finally, and despite their totally independent considerations of the gas-surface molecular interaction, the Maxwell and Langmuir slip models are shown to be in qualitative agreement with direct simulation Monte Carlo data in capturing the general features of the flow field.
Organisation
CCLRC
,
CSE
,
CSE-CEG
Keywords
Rarefied gas dynamics
,
Cylindrical Couette flow
,
Non continuum
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Phys Fluids
17, no. 8 (2005): 087105.
doi:10.1063/1.2003154
2005
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