Flow structure of microbubble-laden turbulent channel flow measured by PIV combined with the shadow image technique

Atsuhide Kitagawa, Koichi Hishida, Yoshiaki Kodama

研究成果: Article

75 引用 (Scopus)

抜粋

The turbulence structure of a horizontal channel flow with microbubbles is experimentally investigated using combined particle image velocimetry (PIV) in order to clarify the mechanism of drag reduction caused by microbubbles. A new system which simultaneously measures the liquid phase and the dispersed bubbles is proposed, based on a combination of particle tracking velocimetry (PTV), laser-induced fluorescence (LIF) and the shadow image technique (SIT). To accurately obtain the velocity of the liquid phase, tracer particles which overlap with the bubble shadow images are almost entirely eliminated in the post-processing. Finally, the turbulence characteristics of the flow field are presented, including measurements for both phases, and the bubble effect on the turbulence is quantified.

元の言語English
ページ(範囲)466-475
ページ数10
ジャーナルExperiments in Fluids
38
発行部数4
DOI
出版物ステータスPublished - 2005 4 1

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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