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Experiments in Fluids
Erschienen in: Experiments in Fluids 4/2005

01.04.2005 | Originals

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

verfasst von: Atsuhide Kitagawa, Koichi Hishida, Yoshiaki Kodama

Erschienen in: Experiments in Fluids | Ausgabe 4/2005

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Abstract

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.
Vorheriger Artikel Three-dimensional fluorescent particle tracking at micron-scale using a single camera
Nächster Artikel Particle-wall collision in shear thinning fluids

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Metadaten
Titel
Flow structure of microbubble-laden turbulent channel flow measured by PIV combined with the shadow image technique
verfasst von
Atsuhide Kitagawa
Koichi Hishida
Yoshiaki Kodama
Publikationsdatum
01.04.2005
Erschienen in
Experiments in Fluids / Ausgabe 4/2005
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-004-0926-8

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