Non-Gaussian Turbulence Field as a Dissipative Structure

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概要

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• The dynamical mechanism producing non-Gaussian (intermittent) turbulence fieldwith a large kurtosis is investigated on the basis of theoretical considerations andfrom the results of full numerical simulations of three-dimensional inviscid truncatedsystem and Navier-Stokes equation. The simulations show that the nonlinearity plusthe viscous dissipation in the Navier-Stokes equation maintain the large kurtosis; theintermittency can be characterized as a dissipative structure produced by a non-equilibrium and nonlinear system. On the other hand, the phase correlation producingthe large kurtosis may contribute to the energy transfer. This result indicates that theintermittency and the energy transfer have a complementary relation to each other.[energy transfer, intermittency, inviscid truncated system, kurtosis, Navier- ll Stokes equationl

• 社団法人日本物理学会の論文
• 1991-09-15

著者

• SANADA Tsutomu

  Institute of Computational Fluid Dynamics

関連論文

• Statistics of Energy-Dissipation Clusters in Three-Dimensional Homogeneous Turbulence : Condensed Matter and Statistical Physics
• Non-Gaussian Turbulence Field as a Dissipative Structure

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