In this study, confined swirling flows of an aqueous surfactant solution due to a rotating disk in a cylindrical casing were investigated using a sectional flow visualization technique and a two-component laser Doppler velocimetry system. The concentrations of aqueous surfactant solutions are , , and . Rheological properties such as shear viscosity and first normal stress difference of the surfactant solution were measured with a rheometer. The patterns of secondary flow were classified using the Reynolds and elasticity numbers. We revealed that the projection formed near the center of the rotating disk moved up and down at a constant frequency for and , which has not been reported as far as we know. The effects of the Reynolds number, elasticity number, and aspect ratio on the velocity profiles were clarified. It was also found that the region of rigid body rotation existed at the higher Reynolds number tested for .
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August 2008
Research Papers
Confined Swirling Flows of Aqueous Surfactant Solutions Due to a Rotating Disk in a Cylindrical Casing
Shinji Tamano,
Shinji Tamano
Graduate School of Engineering,
e-mail: tamano.shinji@nitech.ac.jp
Nagoya Institute of Technology
, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
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Motoyuki Itoh,
Motoyuki Itoh
Graduate School of Engineering,
Nagoya Institute of Technology
, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
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Mitsunori Yoshida,
Mitsunori Yoshida
Toyota Industries Corporation
, 2-1 Toyoda-cho, Kariya, Aichi 448-8671, Japan
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Kazuhiko Yokota
Kazuhiko Yokota
Graduate School of Engineering,
Nagoya Institute of Technology
, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
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Shinji Tamano
Graduate School of Engineering,
Nagoya Institute of Technology
, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japane-mail: tamano.shinji@nitech.ac.jp
Motoyuki Itoh
Graduate School of Engineering,
Nagoya Institute of Technology
, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
Mitsunori Yoshida
Toyota Industries Corporation
, 2-1 Toyoda-cho, Kariya, Aichi 448-8671, Japan
Kazuhiko Yokota
Graduate School of Engineering,
Nagoya Institute of Technology
, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, JapanJ. Fluids Eng. Aug 2008, 130(8): 081502 (9 pages)
Published Online: July 23, 2008
Article history
Received:
February 27, 2007
Revised:
August 23, 2007
Published:
July 23, 2008
Citation
Tamano, S., Itoh, M., Yoshida, M., and Yokota, K. (July 23, 2008). "Confined Swirling Flows of Aqueous Surfactant Solutions Due to a Rotating Disk in a Cylindrical Casing." ASME. J. Fluids Eng. August 2008; 130(8): 081502. https://doi.org/10.1115/1.2956593
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