TY - JOUR

T1 - Viscosity of Gases in Nanochannels

AU - Rudyak, V. Ya

AU - Lezhnev, E. V.

N1 - Funding Information: This work was supported by the Russian Foundation for Basic Research, grants nos. 19-01-00399 and 20-01-00041. Publisher Copyright: © 2020, Pleiades Publishing, Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/10

Y1 - 2020/10

N2 - The viscosity of a rarefied gas in nanochannels under normal conditions is studied. The viscosity coefficient is calculated from the Green–Kubo formula using the stochastic molecular method. The interaction of gas molecules with the wall is described by the specular, diffuse, or specular-diffuse laws. Gas temperature and channel height are varied. It is shown that the viscosity in the nanochannel is essentially anisotropic. Along the channel, it almost always coincides with its corresponding bulk viscosity. By varying the accommodation coefficient, the total viscosity of the gas can be either reduced or increased several-fold.

AB - The viscosity of a rarefied gas in nanochannels under normal conditions is studied. The viscosity coefficient is calculated from the Green–Kubo formula using the stochastic molecular method. The interaction of gas molecules with the wall is described by the specular, diffuse, or specular-diffuse laws. Gas temperature and channel height are varied. It is shown that the viscosity in the nanochannel is essentially anisotropic. Along the channel, it almost always coincides with its corresponding bulk viscosity. By varying the accommodation coefficient, the total viscosity of the gas can be either reduced or increased several-fold.

KW - modeling

KW - nanochannel

KW - rarefied gas

KW - viscosity

UR - http://www.scopus.com/inward/record.url?scp=85095762736&partnerID=8YFLogxK

U2 - 10.1134/S1063785020100260

DO - 10.1134/S1063785020100260

M3 - Article

AN - SCOPUS:85095762736

VL - 46

SP - 1045

EP - 1048

JO - Technical Physics Letters

JF - Technical Physics Letters

SN - 1063-7850

IS - 10

ER -