Self-Similarity and Universality in Rayleigh-Taylor, Boussinesq Turbulence

Details Self-Similarity and Universality in Rayleigh-Taylor, Boussinesq Turbulence Self-Similarity and Universality in Rayleigh-Taylor, Boussinesq Turbulence

2008-01-18

arxiv.org/abs/0801.2981v2

Physics

Fluid Dynamics

10 pages, 11 figures

Scientific paper

10.1063/1.3054152

We report and discuss case study simulations of the Rayleigh-Taylor instability in the Boussinesq, incompressible regime developed to turbulence. Our main focus is on a statistical analysis of density and velocity fluctuations inside of the already developed and growing in size mixing zone. Novel observations reported in the manuscript concern self-similarity of the velocity and density fluctuations spectra inside of the mixing zone snapshot, independence of the spectra of the horizontal slice level, and universality showing itself in a virtual independence of the internal structure of the mixing zone, measured in the re-scaled spatial units, of the initial interface perturbations.

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