An onset of micromixing flow utilizing marangoni force

Takashi Yamada, Naoki Ono

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Many kinds of micromixer have been proposed and studied in this decade. The mixing mechanism of most of them has been mainly dependent on molecular diffusion. Therefore, adopting small diffusive distance has been primary measure of mixing enhancement. In this study, we have investigated a novel mixing process with two liquids having difference in surface tension, by the onset of Marangoni effect. Marangoni effect is typical phenomenon on gas-liquid free interface when there is the variation in surface tension. We conducted basic experiments in a microchannel using an air-bubble surface as the gas-liquid interface for the onset of Marangoni covection. We also performed CFD simulation to compare with the experiments. In the experiments, we successfully observed vortex flow which can contribute to species mixing, on the bubble in a few seconds after the moment of contact of the two liquids. Moreover, the CFD simulation could reproduce the vortex flow successfully.

Original languageEnglish
Pages (from-to)888-899
Number of pages12
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume79
Issue number801
DOIs
Publication statusPublished - 2013

Fingerprint

Liquids
liquids
charge flow devices
Surface tension
interfacial tension
Computational fluid dynamics
Vortex flow
bubbles
vortices
molecular diffusion
Experiments
microchannels
Microchannels
Bubbles (in fluids)
Gases
gases
Contacts (fluid mechanics)
simulation
moments
augmentation

Keywords

  • Computational fluid dynamics
  • Gas-liquid free interface
  • Marangoni effect
  • Micromixing
  • Vortex flow

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

An onset of micromixing flow utilizing marangoni force. / Yamada, Takashi; Ono, Naoki.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 79, No. 801, 2013, p. 888-899.

Research output: Contribution to journalArticle

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