Deduction of slip coefficient in slip and transition regimes from existing cylindrical Couette flow data
DSpace at IIT Bombay
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Title |
Deduction of slip coefficient in slip and transition regimes from existing cylindrical Couette flow data
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Creator |
AGARWAL, AMIT
PRABHU, SV |
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Subject |
computation theory
flow velocity confined flow transition flow |
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Description |
In this paper, we examine the experimental data of Kuhlthau [A.R. Kuhlthau, Air friction on rapidly moving surfaces, Journal of Applied Physics 20 (1949) 217] on two concentric rotating cylinders with a low pressure gas in the gap. The data are used to deduce the slip coefficient in the slip flow and transition flow regimes (0.04less-than-or-equals, slantKnless-than-or-equals, slant8.3). The obtained values of tangential momentum accommodation coefficient for dry air is 1.13 in the slip regime and 1.70 in the transition regime. These results suggest a dependence of slip coefficient on Knudsen number, Kn. Some comments on velocity profile inversion reported in the literature for such flows and calculation of slip velocity on non-planar surfaces are also made. The results are important because they suggest that the Navier–Stokes equation, with slight correction, can be used for analysis of flow in such high Knudsen number regimes.
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Publisher |
Elsevier
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Date |
2009-04-21T07:36:27Z
2011-11-25T20:57:35Z 2011-12-26T13:08:23Z 2011-12-27T05:56:23Z 2009-04-21T07:36:27Z 2011-11-25T20:57:35Z 2011-12-26T13:08:23Z 2011-12-27T05:56:23Z 2008 |
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Type |
Article
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Identifier |
Experimental Thermal and Fluid Science 32(4), 991-996
0894-1777 http://dx.doi.org/10.1016/j.expthermflusci.2007.11.010 http://hdl.handle.net/10054/1169 http://dspace.library.iitb.ac.in/xmlui/handle/10054/1169 |
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Language |
en
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