A Wave Motion on the free surface of the Taylor vortex flow with an asymmetric system. Flow Visualization and FFT Analysis.

The laser-induced fluorescence (LIF) technique carried out the flow visualization for the formation of Taylor vortex, which occurred in the gap between the two coaxial cylinders. The test fluids were tap water and glycerin 60wt% solution as Newtonian fluids. Polyacrilamide (SeparanAP-30) solutions in the concentration range of 10 ppm to 1000 ppm and polyethylene-oxide (PEO15) solutions in the range of 20 ppm to 1000 ppm were tested as non-Newtonian fluids, respectively. The Reynolds number range was 80 < Re < 4.0 × 103 in the experiment. The rotating inner cylinder was accelerated under the slow condition (dRe*/ dt ≤ 1 min−1) in order to obtain a Taylor vortex flow of the stable primary mode. Flow visualization results showed that the Go¨rtler vortices of half the number of Taylor cells occurred in the gap when Taylor vortex flow of the primary mode was formed. In addition, the critical Reynolds number of the polymer solutions case, which Taylor vortices occur, because the generation of the Go¨rtler vortices was retarded. At the higher concentration of the polymer solutions, this effect became remarkable. Measurements of steady-state Taylor cells showed that the upper and the lower cells of polymer solutions became larger in wavelength than that of the Newtonian fluids. The Taylor vortex flow of non-Newtonian fluids was analyzed and the result of the Giesekus model agreed with the experimental result.

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4115 Developing process of Couette-Taylor vortex : Flow visualization and PIV-measurement

The proceedings of the JSME annual meeting ◽

10.1299/jsmemecjo.2006.2.0_421 ◽

2006 ◽

Vol 2006.2 (0) ◽

pp. 421-422

Author(s):

Miho KATO ◽

Hiroyuki FURUKAWA ◽

Yorinobu TOYA ◽

Takasi WATANABE ◽

Ikuo NAKAMURA

Keyword(s):

Flow Visualization ◽

Vortex Flow ◽

Taylor Vortex ◽

Taylor Vortex Flow ◽

Piv Measurement

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An experiment on a taylor vortex flow in a gap with a small aspect ratio. 4th Report. Bifurcation of the flow in an asymmetric system.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.56.3617 ◽

1990 ◽

Vol 56 (532) ◽

pp. 3617-3624 ◽

Cited By ~ 1

Author(s):

Yorinobu TOYA ◽

Ikuo NAKAMURA ◽

Shintaro YAMASHITA ◽

Yoshinori UEKI

Keyword(s):

Aspect Ratio ◽

Vortex Flow ◽

Taylor Vortex ◽

Small Aspect Ratio ◽

Asymmetric System ◽

Taylor Vortex Flow

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Formation of Taylor Vortex Flow of Polymer Solutions

Journal of Fluids Engineering ◽

10.1115/1.2137350 ◽

2005 ◽

Vol 128 (1) ◽

pp. 95-100 ◽

Cited By ~ 6

Author(s):

Keizo Watanabe ◽

Shu Sumio ◽

Satoshi Ogata

Keyword(s):

Reynolds Number ◽

Flow Visualization ◽

Vortex Flow ◽

Polymer Solutions ◽

Newtonian Fluids ◽

Taylor Vortex ◽

Primary Mode ◽

Görtler Vortices ◽

Taylor Vortex Flow ◽

Gortler Vortices

Laser-induced fluorescence (LIF) was applied for the flow visualization of the formation of a Taylor vortex, which occurred in the gap between two coaxial cylinders. The test fluids were tap water and glycerin 60 %wt solution as Newtonian fluids; polyacrilamide (SeparanAP-30) solutions in the concentration range of 10 to 1000ppm and polyethylene-oxide (PEO15) solutions in the range of 20 to 1000ppm were tested as non-Newtonian fluids. The Reynolds number range in the experiment was 80<Re<4.0×103. The rotating inner cylinder was accelerated under the slow condition (dRe*∕dt⩽1min−1) in order to obtain a Taylor vortex flow in stable primary mode. Flow visualization results showed that the Görtler vortices of half the number of the Taylor cells occurred in the gap when the Taylor vortex flow was formed in the primary mode. In addition, the critical Reynolds number of the polymer solutions increased, where Taylor vortices occur, because the generation of the Görtler vortices was retarded. In high concentration polymer solutions, this effect became remarkable. Measurements of steady-state Taylor cells showed that the upper and lower cells of polymer solutions became larger in wavelength than those of the Newtonian fluids. The Taylor vortex flow of non-Newtonian fluids was analyzed and the result obtained using the Giesekus model agreed with the experimental result.

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