In this paper, the three-dimensional (3D) structures of a micellar solution flow in the curvilinear microchannel have been investigated by means of confocal micro particle image velocimetry (PIV). The working fluid is aqueous solution of CTAC/NaSal (cetyltrimethylammonium / Sodium Salysilate). As the flow rate increases, the flow gradually gets into the irregular motion. It is found that the inside flow seems not completely chaotic, but in a manner of oscillation. To be specific, the flow nonlinearity grows as the flow rate increases, the inside flow shows different structures near the wall region and in the bulk due to the elongation of viscoelastic surfactant. Typically, two sub-streams were twisted together, and their flow directions change at the locations where the signs of geometric curvature change. The oscillation stripes represented the area of high extensional stress in the viscoelastic fluid, and were further identified by using polarized high-speed camera. Moreover, statistics shows that the viscoelastic flow field inside the curved microchannel shares the main features of elastic turbulence.
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ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems
July 6–9, 2015
San Francisco, California, USA
Conference Sponsors:
- Heat Transfer Division
- Fluids Engineering Division
ISBN:
978-0-7918-5687-1
PROCEEDINGS PAPER
On the 3D Structure of Elasticity-Induced Unstable Flow in the Curved Microchannel by Using Confocal Micro-PIV and Polarized Camera Available to Purchase
Xiao-Bin Li,
Xiao-Bin Li
Harbin Institute of Technology, Harbin, China
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Masamichi Oishi,
Masamichi Oishi
The University of Tokyo, Tokyo, Japan
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Marie Oshima,
Marie Oshima
The University of Tokyo, Tokyo, Japan
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Feng-Chen Li,
Feng-Chen Li
Harbin Institute of Technology, Harbin, China
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Song-Jing Li
Song-Jing Li
Harbin Institute of Technology, Harbin, China
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Xiao-Bin Li
Harbin Institute of Technology, Harbin, China
Masamichi Oishi
The University of Tokyo, Tokyo, Japan
Marie Oshima
The University of Tokyo, Tokyo, Japan
Feng-Chen Li
Harbin Institute of Technology, Harbin, China
Song-Jing Li
Harbin Institute of Technology, Harbin, China
Paper No:
ICNMM2015-48190, V001T04A037; 8 pages
Published Online:
November 18, 2015
Citation
Li, X, Oishi, M, Oshima, M, Li, F, & Li, S. "On the 3D Structure of Elasticity-Induced Unstable Flow in the Curved Microchannel by Using Confocal Micro-PIV and Polarized Camera." Proceedings of the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. San Francisco, California, USA. July 6–9, 2015. V001T04A037. ASME. https://doi.org/10.1115/ICNMM2015-48190
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