Statistics of Energy-Dissipation Clusters in Three-Dimensional Homogeneous Turbulence : Condensed Matter and Statistical Physics
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概要
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The concept of energy-dissipation clusters is introduced for investigating an intermittent turbulence field, which is obtained by a direct numerical simulation of the three-dimensional incompressible Navier-Stokes equation. The statistics of the clusters characterize some intermittent properties, such as the degrees of concentration and connectivity of highly energy-dissipated regions. The concentration may not depend on the Reynolds number, while the connectivity becomes weaker as the number increases: The higher Reynolds number field appears more spotty. Moreover the cluster size suggests the power-law distribution with a universal exponent.
- 1991-03-25
著者
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Ishii Katsuya
Institute Of Space And Astronautical Science
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ISHII Kikujiro
Department of Chemistry, Gakushuin University
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Kuwahara Kunio
Institute Of Astronautical Science Jaxa
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Kuwahara Kunio
Institute Of Computational Fluid Dynamics
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SANADA Tsutomu
Institute of Computational Fluid Dynamics
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ISHII Kazushige
Department of Biology, Faculty of Science Kyushu University
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