Zero-Mean-Absolute-Vorticity State and Vortical Structures in Rotating Channel Flow(Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics and Fluid Mechanics)

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概要

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• The plane-Poiseuille-type flow is numerically investigated in a rotating coordinate system with small system rotation rates for low Reynolds numbers. We obtained two-dimensional and three-dimensional solutions which exhibit characteristic coherent vortical structures by time-evolution calculations of the Fourier and Chebyshev expansions. It is interesting that mean-absolute-vorticity becomes nearly zero in the region where the vortical structures concentrate. We found for relatively small Reynolds number and rotation number ranges that two-dimensional solutions and traveling-wave solutions having the same spatial symmetry are stably maintained. We also found a two-dimensional periodic solution which switches two and four vortices states. The asymptotic states of the time-developing solutions are obtained as steady or traveling-wave solutions by the Newton-Raphson iteration method.

• 社団法人日本物理学会の論文
• 2004-06-15

著者

• YANASE Shinichiro

  Department of Mechanical Engineering, Faculty of Engineering, Okayama University

• Yanase Shinichiro

  Department Of Engineering Sciences Okayama University

• Kaga Yoshito

  Graduate School Of Natural Science And Technology Okayama University

• Yanase Shinichiro

  Department Of Engineering Sciences Faculty Of Engineering Okayama University

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