On fundamental of Rayleigh-Taylor turbulent mixing: Correlations and fluctuations in statistically unsteady turbulent processes

Research output: Chapter in Book/Conference paperConference paper

Abstract

We present the physics-based theoretical analysis of the mechanisms and the properties of Rayleigh-Taylor turbulent mixing, and focus on the consideration of correlations and fluctuations of the statistically unsteady turbulent mixing dynamics. The analysis extends to non-canonical circumstances the ideas of Kolmogorov theory on symmetries of turbulent dynamics, accounts for the essentially multi-scale character of the flow evolution, and identifies the transport of momentum as a better indicator of turbulent mixing dynamics than the transport of energy. The invariance of the rate of momentum loss leads to essentially non-Kolmogorov invariant, scaling and spectral properties of turbulent mixing flow. Rayleigh-Taylor turbulent mixing exhibits more order compared to isotropic turbulence. Its viscous and dissipation scales are finite and set by the flow acceleration. We discuss the outcomes of theoretical results for practical applications and for the methods of flow mitigation and control.

Original languageEnglish
Title of host publication6th AIAA Theoretical Fluid Mechanics Conference
Place of PublicationHonolulu
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
ISBN (Print)9781624101441
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event6th AIAA Theoretical Fluid Mechanics Conference - Honolulu, United States
Duration: 27 Jun 201130 Jun 2011

Conference

Conference6th AIAA Theoretical Fluid Mechanics Conference
CountryUnited States
CityHonolulu
Period27/06/1130/06/11

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    Abarzhi, S. I. (2011). On fundamental of Rayleigh-Taylor turbulent mixing: Correlations and fluctuations in statistically unsteady turbulent processes. In 6th AIAA Theoretical Fluid Mechanics Conference American Institute of Aeronautics and Astronautics Inc. (AIAA). https://doi.org/10.2514/6.2011-4026