Numerical study on gas-liquid interface in a microchannel

Kou Koga, Ryoji Doihara, Koji Takahashi

研究成果: ジャーナルへの寄稿記事

抄録

A bubble or droplet can be driven in a microchannel due to the thermocapillary force controlled by microheaters, which comes from the surface tension imbalance. Though practical optical switches based on this principle have been developed by micromachining technique, there has been no contribution of fluid dynamics both experimentally and analytically. In order to treat gas-liquid interface accurately in a microchannel, it is necessary to improve the models of surface tension and contact angle. A new numerical scheme is developed based on C-CUP and Level-Set function method with CSF model and is able to calculate the surface tension distribution precisely. It is the first time to simulate the thermally-driven bubble in a microchannel and the obtained results show good agreements with experimental results qualitatively. Comparisons with the conventional numerical schemes and fundamental mechanisms of the thermally-driven interfaces are also discussed.

元の言語英語
ページ(範囲)1344-1351
ページ数8
ジャーナルNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
68
発行部数669
DOI
出版物ステータス出版済み - 1 1 2002

Fingerprint

microchannels
Microchannels
Surface tension
interfacial tension
Liquids
bubbles
liquids
Gases
gases
Optical switches
Micromachining
micromachining
fluid dynamics
Fluid dynamics
Bubbles (in fluids)
Contact angle
switches

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

これを引用

Numerical study on gas-liquid interface in a microchannel. / Koga, Kou; Doihara, Ryoji; Takahashi, Koji.

:: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, 巻 68, 番号 669, 01.01.2002, p. 1344-1351.

研究成果: ジャーナルへの寄稿記事

@article{f2bbab721acf41b8b9d6eb7034eaf044,
title = "Numerical study on gas-liquid interface in a microchannel",
abstract = "A bubble or droplet can be driven in a microchannel due to the thermocapillary force controlled by microheaters, which comes from the surface tension imbalance. Though practical optical switches based on this principle have been developed by micromachining technique, there has been no contribution of fluid dynamics both experimentally and analytically. In order to treat gas-liquid interface accurately in a microchannel, it is necessary to improve the models of surface tension and contact angle. A new numerical scheme is developed based on C-CUP and Level-Set function method with CSF model and is able to calculate the surface tension distribution precisely. It is the first time to simulate the thermally-driven bubble in a microchannel and the obtained results show good agreements with experimental results qualitatively. Comparisons with the conventional numerical schemes and fundamental mechanisms of the thermally-driven interfaces are also discussed.",
author = "Kou Koga and Ryoji Doihara and Koji Takahashi",
year = "2002",
month = "1",
day = "1",
doi = "10.1299/kikaib.68.1344",
language = "English",
volume = "68",
pages = "1344--1351",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "The Japan Society of Mechanical Engineers",
number = "669",

}

TY - JOUR

T1 - Numerical study on gas-liquid interface in a microchannel

AU - Koga, Kou

AU - Doihara, Ryoji

AU - Takahashi, Koji

PY - 2002/1/1

Y1 - 2002/1/1

N2 - A bubble or droplet can be driven in a microchannel due to the thermocapillary force controlled by microheaters, which comes from the surface tension imbalance. Though practical optical switches based on this principle have been developed by micromachining technique, there has been no contribution of fluid dynamics both experimentally and analytically. In order to treat gas-liquid interface accurately in a microchannel, it is necessary to improve the models of surface tension and contact angle. A new numerical scheme is developed based on C-CUP and Level-Set function method with CSF model and is able to calculate the surface tension distribution precisely. It is the first time to simulate the thermally-driven bubble in a microchannel and the obtained results show good agreements with experimental results qualitatively. Comparisons with the conventional numerical schemes and fundamental mechanisms of the thermally-driven interfaces are also discussed.

AB - A bubble or droplet can be driven in a microchannel due to the thermocapillary force controlled by microheaters, which comes from the surface tension imbalance. Though practical optical switches based on this principle have been developed by micromachining technique, there has been no contribution of fluid dynamics both experimentally and analytically. In order to treat gas-liquid interface accurately in a microchannel, it is necessary to improve the models of surface tension and contact angle. A new numerical scheme is developed based on C-CUP and Level-Set function method with CSF model and is able to calculate the surface tension distribution precisely. It is the first time to simulate the thermally-driven bubble in a microchannel and the obtained results show good agreements with experimental results qualitatively. Comparisons with the conventional numerical schemes and fundamental mechanisms of the thermally-driven interfaces are also discussed.

UR - http://www.scopus.com/inward/record.url?scp=0036589672&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036589672&partnerID=8YFLogxK

U2 - 10.1299/kikaib.68.1344

DO - 10.1299/kikaib.68.1344

M3 - Article

AN - SCOPUS:0036589672

VL - 68

SP - 1344

EP - 1351

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 669

ER -