The Surface Wave Instability of Stratified Incompressible Cylinders with Differential Rotation : Astrophysics and Relativity

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概要

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• To proceed to investigations of the stability of nonhomentropic gases with differential rotation to non-axisymmetric perturbations, we examine the incompressible cylinders with a sequence of density distributions. Owing to consideration of the buoyancy, their stability bears an aspect of general influence of the entropy gradients on the stability. We approach the problem in the two different ways: an analytic calculation for the cylinders with the infinitesimally small density gradients and a numerical computation for the cylinders with finite density gradients. We show that the density gradients (i) decrease the maximum of the growth rate of each unstable mode and (ii) extend the unstable region. For the thin cylinders, the density gradient suppresses the instability, while it enhances the instability for the thicker cylinders. The property (ii) can be explained by the description that each of the pattern speeds of the edge waves which interact with each other is diminished by the buoyancy.

• 理論物理学刊行会の論文
• 1989-09-25

著者

• SEKIYA Minoru

  Department of Applied Physics, Tokyo Institute of Technology

• MIYAMA Shoken

  National Astronomical Observatory

• Sekiya M

  Department Of Mechanical And Precision System Teikyo University

• Sekiya Minoru

  Department Of Earth And Planetary Sciences Faculty Of Sciences 33 Kyushu University

• Sekiya Minoru

  Department Of Applied Physics Tokyo Institute Of Technology

• Kojima Yasuaki

  Graduate School Of Engineering Hiroshima University

• KUBOTANI Hirto

  Faculty of Engineering, Kanagawa University

• KOJIMA Yasufumi

  Department of Physics, Tokyo Metropolitan University

• Kojima Y

  Department Of Physics Hiroshima University

• Kojima Yasufumi

  Department Of Physics Hiroshima University

• Kojima Yasufumi

  Department Of Physics University Of Wales

• KUBOTANI Hiroto

  Department of Physics, Kyoto University

• Shoken M.

  National Astronomical Observatory

• Kubotani Hiroto

  Department Of Mathenatics Nara University Of Education

• Kubotani Hiroto

  Department Of Physics Kyoto University

• SEKIYA Makoto

  Department of Physics, Kyoto University

• KOJIMA Yasufumi

  Department of Physics, University of Wales

• SEKIYA Minoru

  Department of Physics, Kyoto University

• SEKIYA Minoru

  Department of Mechanical and Precision System, Teikyo University

• SEKIYA Minoru

  Department of Earth and Planetary Sciences, Faculty of Sciences 33, Kyushu University

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