Near-wall scaling of the Navier-Stokes constitutive relations for accurate micro gas flow simulations
Lockerby, Duncan A. and Reese, Jason M. (2007) Near-wall scaling of the Navier-Stokes constitutive relations for accurate micro gas flow simulations. In: 5th International Conference on Nanochannels, Microchannels, and Minichannels, Puebla, MEXICO, JUN 18-20, 2007. Published in: ICNMM2007: PROCEEDINGS OF THE 5TH INTERNATIONAL CONFERENCE ON NANOCHANNELS, MICROCHANNELS, AND MINICHANNELS pp. 357-363.Full text not available from this repository.
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 (UNSPECIFIED)|
|Subjects:||T Technology > TJ Mechanical engineering and machinery
|Journal or Publication Title:||ICNMM2007: PROCEEDINGS OF THE 5TH INTERNATIONAL CONFERENCE ON NANOCHANNELS, MICROCHANNELS, AND MINICHANNELS|
|Publisher:||AMER SOC MECHANICAL ENGINEERS|
|Number of Pages:||7|
|Page Range:||pp. 357-363|
|Title of Event:||5th International Conference on Nanochannels, Microchannels, and Minichannels|
|Location of Event:||Puebla, MEXICO|
|Date(s) of Event:||JUN 18-20, 2007|
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