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Dynamic Geometrical Analysis of High-Enstrophy Structures in Isotropic Turbulence

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The time evolution of fine-scale tube-like vortical structures in isotropic turbulence is investigated by dynamic geometrical analysis. Our method successfully captures series of events like deformation, creation, extinction, merging and fission of the vortical structures. It is found that extinction and fission are more frequent than creation and merging, respectively.

Author(s):

Yuji Hattori    
IFS, Tohoku University
Japan

Takashi Ishihara    
Graduate School of Engineering, Nagoya University
Japan