Near-wall scaling of the Navier-Stokes constitutive relations of accurate micro gas flow simulations

J.M. Reese, Duncan A. Lockerby

Research output: Contribution to conferencePaper

2 Citations (Scopus)

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.
Original languageEnglish
Publication statusPublished - 2007
Event5th International Conference on Nanochannels, Microchannels and Minichannels - Puebla, Mexico
Duration: 18 Jun 200720 Jun 2007

Conference

Conference5th International Conference on Nanochannels, Microchannels and Minichannels
Abbreviated titleICNMM 2007
CountryMexico
CityPuebla
Period18/06/0720/06/07

Keywords

  • gas flow
  • navier-stokes
  • hydrodynamics
  • microchannels

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    Reese, J. M., & Lockerby, D. A. (2007). Near-wall scaling of the Navier-Stokes constitutive relations of accurate micro gas flow simulations. Paper presented at 5th International Conference on Nanochannels, Microchannels and Minichannels , Puebla, Mexico.