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Near-wall scaling of the Navier-Stokes constitutive relations for accurate micro gas flow simulations
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Lockerby, Duncan A. and Reese, Jason M. (2007) Near-wall scaling of the Navier-Stokes constitutive relations for accurate micro gas flow simulations. In: ICNMM2007: 5th International Conference on Nanochannels, Microchannels, and Minichannels, Puebla, Mexico, 18-20 Jun 2007. Published in: Proceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007 pp. 357-363. ISBN 978079184272X. doi:10.1115/ICNMM2007-30061
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Official URL: http://dx.doi.org/10.1115/ICNMM2007-30061
Abstract
A new model is described for micro gas flows that combines a second-order slip boundary condition with a near-wall scaling of the Navier-Stokes constitutive relations. This scheme, which is easily implemented within a conventional CFD framework, is shown to be far more accurate than the conventional second-order slip model at predicting high Knudsen number micro Couette and Poiseuille flows. It is also of equivalent computational cost, and as such, represents a more attractive alternative to the conventional slip approach. It is also shown that the current model is capable of accurately predicting combined Couette/Poiseulle flows at a much higher Knudsen number than second-order slip conditions, which bodes well for the applicability of the scheme to more general configurations.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology |
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| Divisions: | Faculty of Science > Engineering | ||||
| Journal or Publication Title: | Proceedings of the 5th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2007 | ||||
| Publisher: | American Society for Chemical Engineers | ||||
| ISBN: | 978079184272X | ||||
| Official Date: | 2007 | ||||
| Dates: |
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| Number of Pages: | 7 | ||||
| Page Range: | pp. 357-363 | ||||
| DOI: | 10.1115/ICNMM2007-30061 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | ICNMM2007: 5th International Conference on Nanochannels, Microchannels, and Minichannels | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Puebla, Mexico | ||||
| Date(s) of Event: | 18-20 Jun 2007 |
Data sourced from Thomson Reuters' Web of Knowledge
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