Numerical predictions are compared with the experiments of swirling turbulent flows in a pipe where the swirl is driven by the pipe wall rotating around the pipe axis. The laminarization phenomena, that is, the deformation of the axial velocity profile into a shape similar to the laminar one and the decrease of the friction factor, caused by the pipe rotation can be predicted by the calculations applying the stress equation turbulence model. However, calculations applying two types of the k-ε two-equation models with and without the modification by the Richardson number, cannot predict the laminarization phenomena and the characteristic behaviors due to the swirl. The interpretations of the laminarization phenomena and the applicability of the turbulence models are presented.
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December 1988
Research Papers
Predictions of the Laminarization Phenomena in an Axially Rotating Pipe Flow
Shuichiro Hirai,
Shuichiro Hirai
Department of Mechanical Engineering, Osaka Univ., Suita, Osaka, 565, Japan
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Toshimi Takagi,
Toshimi Takagi
Department of Mechanical Engineering, Osaka Univ., Suita, Osaka, 565, Japan
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Masaharu Matsumoto
Masaharu Matsumoto
Sanyo Electric Company, Tottori, 680, Japan
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Shuichiro Hirai
Department of Mechanical Engineering, Osaka Univ., Suita, Osaka, 565, Japan
Toshimi Takagi
Department of Mechanical Engineering, Osaka Univ., Suita, Osaka, 565, Japan
Masaharu Matsumoto
Sanyo Electric Company, Tottori, 680, Japan
J. Fluids Eng. Dec 1988, 110(4): 424-430 (7 pages)
Published Online: December 1, 1988
Article history
Received:
November 21, 1986
Online:
October 26, 2009
Citation
Hirai, S., Takagi, T., and Matsumoto, M. (December 1, 1988). "Predictions of the Laminarization Phenomena in an Axially Rotating Pipe Flow." ASME. J. Fluids Eng. December 1988; 110(4): 424–430. https://doi.org/10.1115/1.3243573
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