Simultaneous visualization is carried out for settling fine copper particles and fluorescent tracer particles in turbulent water flow in an open channel. PIV and PTV techniques are applied to the images of the scattered light from the copper particles and those of the fluorescent light of the tracer particles, respectively. In order to mine the hairpin vortices from the images, the motion of tracer particles around the hairpin vortices has been predicted by using the database obtained by direct numerical simulation (DNS) for turbulent channel flow. It is found that the lift-up of hairpin vortices is attenuated by the depositing copper particles. The clusters of copper particles are found to be sustained in convergence-dominant regions of main flow.
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ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
July 6–10, 2003
Honolulu, Hawaii, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3696-7
PROCEEDINGS PAPER
An Experimental Study on the Interaction Between Settling Particles and Near-Wall Hairpin Vortices in Turbulent Liquid-Solid Open-Channel Flow
Takumi Fukawa,
Takumi Fukawa
Kyoto Institute of Technology, Kyoto, Japan
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Kenji Nansaka,
Kenji Nansaka
Kyoto Institute of Technology, Kyoto, Japan
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Yoshimichi Hagiwara
Yoshimichi Hagiwara
Kyoto Institute of Technology, Kyoto, Japan
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Takumi Fukawa
Kyoto Institute of Technology, Kyoto, Japan
Kenji Nansaka
Kyoto Institute of Technology, Kyoto, Japan
Yoshimichi Hagiwara
Kyoto Institute of Technology, Kyoto, Japan
Paper No:
FEDSM2003-45497, pp. 865-870; 6 pages
Published Online:
February 4, 2009
Citation
Fukawa, T, Nansaka, K, & Hagiwara, Y. "An Experimental Study on the Interaction Between Settling Particles and Near-Wall Hairpin Vortices in Turbulent Liquid-Solid Open-Channel Flow." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 1: Fora, Parts A, B, C, and D. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 865-870. ASME. https://doi.org/10.1115/FEDSM2003-45497
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