Combined particle image velocimetry of turbulence modification in a microbubble channel flow

Atsuhide Kitagawa, Koichi Hishida, Yoshiaki Kodama

研究成果: Article

1 引用 (Scopus)

抜粋

The turbulence structure of flow field including microbubbles in a horizontal channel is experimentally investigated using an image processing technique in order to clarify the mechanism for drag reduction caused by microbubbles. A new system for the simultaneous measurement of liquid and dispersed gas phases is proposed, which is based on the combination of Particle Tracking Velocimetry, Laser Induced Fluorescence and Shadow Image Technique (PTV/LIF/SIT). To accurately detect the velocity vectors of the liquid phase in the two coexistent phases, the tracer particles overlapped with bubble shadow images are almost entirely eliminated in the post-processing stage. Finally, turbulence characteristics of the objective flow field are presented with the measurements for both phases obtained by the proposed system. The local interaction between bubbles and surrounding liquid is clarified.

元の言語English
ページ(範囲)44-51
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
71
発行部数701
DOI
出版物ステータスPublished - 2005 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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