Velocity correlations and accommodation coefficients for gas-wall interactions in nanochannels

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Abstract

In order to understand the behavior of a gas close to a channel wall, it is important to model the gas-wall interactions correctly. When using Molecular Dynamics (MD) simulations these interactions are modeled explicitly, but the computations are time consuming. Replacing the explicit wall with an appropriate wall model reduces the computational time, but should still remain the same characteristics. In this paper the focus lies with an argon gas confined between two platinum walls at different temperature. Several wall models are investigated for their feasibility as a replacement of the MD simulations and are mainly compared using the velocity correlations between impinging and reflecting particles. Moreover, a new method to compute the accommodation coefficient using the velocity correlations is demonstrated.

Original languageEnglish
Title of host publication26th International Symposium on Rarefied Gas Dynamics (RGD26), July 21 - 25, 2008. Kyoto
EditorsT. Abe
Place of PublicationNew York
PublisherAmerican Institute of Physics
Pages659-664
Number of pages6
ISBN (Print)978-0-7354-0615-5
DOIs
Publication statusPublished - 2008
Event26th International Symposium on Rarefied Gas Dynamics, RGD 2008 - Kyoto, Japan
Duration: 21 Jul 200825 Jul 2008
Conference number: 26

Publication series

NameAIP Conference Proceedings
PublisherAmerican Institute of Physics
Volume1084
ISSN (Print)0094-243X

Conference

Conference26th International Symposium on Rarefied Gas Dynamics, RGD 2008
Abbreviated titleRGD 2008
Country/TerritoryJapan
CityKyoto
Period21/07/0825/07/08

Keywords

  • Accommodation coefficient
  • Gas-wall interactions
  • Molecular dynamics
  • Velocity correlation

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