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査読

86 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)466-475
ページ数10
ジャーナルExperiments in Fluids
38
4
DOI
出版ステータスPublished - 2005 4

ASJC Scopus subject areas

  • 計算力学
  • 材料力学
  • 物理学および天文学(全般)
  • 流体および伝熱

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