Document Type

Article

Publication Date

1-1-1992

Publication Title

Physical Review A

Volume

15

Issue Number

46

First Page

5279

Last Page

5281

DOI

10.1103/PhysRevA.46.5279

Keywords

dilute, gas

Disciplines

Other Astrophysics and Astronomy | Other Physics

Abstract

We study the phenomenon of slip length using molecular dynamics and direct simulation Monte Carlo simulations of a dilute gas. Our work extends the range of Knudsen numbers that have been previously studied. In a recent paper, Bhattacharya and Lie [Phys. Rev. 43, 761 (1991)] suggest a logarithmic dependence of slip length on Knudsen number. By a simple redefinition of the mean free path, we obtain good agreement between simulation results and Maxwell theory for slip length. The anomalies seen by Bhattacharya and Lie appear to be due to their definition of the mean free path.

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