Experimental measurement on tangential momentum accommodation coefficient in a single microtube

Hiroki Yamaguchi*, Tsuneo Hanawa, Oto Yamamoto, Yu Matsuda, Yasuhiro Egami, Tomohide Niimi


研究成果: Article査読

60 被引用数 (Scopus)


The tangential momentum accommodation coefficient (TMAC) was investigated experimentally fromthe mass flow rate through a single microtube under the slip flow and the early part of the transition regime. The measurements were carried out by the constant-volume method under the meanKnudsen number smaller than 0.3,which is based on the mean pressure of the inlet and the outlet of the microtube, to apply the second-order slip boundary condition. To measure TMACs on various materials, quite large microtube was employed,which require the reduction in leakage. TMACwas obtained from the slip coefficient determined by the relation of the mass flow rate to the mean Knudsen number. The obtained mass flow rate was well explained by the theoretical equation. TMACs of deactivated-fused silica with argon, nitrogen, and oxygen were measured, showing the tangential momentum was not accommodated completely to the surface, and the values showed good agreement with previous studies. Fromthe comparison between microtubes with different inner diameter, it is showed that TMAC is determined mainly by gas species and surface material.

ジャーナルMicrofluidics and Nanofluidics
出版ステータスPublished - 2011 7月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 材料化学


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