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Third Symposium on Turbulence and Shear Flow Phenomena
June, 25-27, 2003, International Center, Sendai, Japan

DOI: 10.1615/TSFP3

SUPPRESSION OF VORTEX STRETCHING AND GENERATION OF ACOUSTIC/KELVIN WAVES IN COMPRESSIBLE HOMOGENEOUS TURBULENCE

pages 1115-1120
DOI: 10.1615/TSFP3.1860
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ABSTRACT

Vortex structures in compressible isotropic turbulence are compared to those in incompressible isotropic turbulence in order to elucidate compressibility effects on vortices. It is shown that vortex cross-sections, vortex circulations, and some other quantities which characterize strength of swirling motions of vortices are suppressed by compressibility. The suppressions are attributed to effects of the density variations in the initial stage of vortex formation and succeeding reduction of the vortex stretching. It is also shown that waves excited on vortices are considerably changed by existence of compressibility.

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