Journal of Plasma and Fusion Research
Print ISSN : 0918-7928
Nonlinear Evolution of Single Spike Structure and Vortex in the Richtmyer-Meshkov Instability
Yuko FUKUDAKatsunobu NISHIHARAMasayo OKAMOTOChihiro MATSUOKARyuichi ISHIZAKIHitoshi SAKAGAMIHideo NAGATOMO
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1999 Volume 75-CD Issue 10_CD Pages 201-210

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Abstract
Nonlinear evolution of single spike structure and vortex in the Richtmyer-Meshkov instability is investigated for two dimensional case, and axial symmetric and non axial symmetric cases with the use of a three-dimensional hydrodynamic code. It is shown that singularity appears in the vorticity left by transmitted and reflected shocks at a corrugated interface. This singularity results in opposite sign of vorticity along the interface that causes double spiral structure of the spike. Difference of nonlinear growth rate and double spiral structure among three cases is also discussed by visualization of simulation data. In a case that there is no slip-off of initial spike axis, vorticity ring is relatively stable, but phase rotation occurs.
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© 1999 by The Japan Society of Plasma Science and Nuclear Fusion Research
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