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3D Numerical simulation of Rayleigh–Taylor instability using MAH-3 code

Published online by Cambridge University Press:  07 March 2001

N.N. ANUCHINA ,
V.I. VOLKOV ,
V.A. GORDEYCHUK ,
N.S. ES'KOV ,
O.S. IIYUTINA  and
O.M. KOZYREV
N.N. ANUCHINA
Affiliation:
Russian Federal Nuclear Center, All-Russian Scientific Research Institute of Technical Physics, P.O. 245, Snezhinsk Chelyabinsk Region, Russia 456770
V.I. VOLKOV
Affiliation:
Russian Federal Nuclear Center, All-Russian Scientific Research Institute of Technical Physics, P.O. 245, Snezhinsk Chelyabinsk Region, Russia 456770
V.A. GORDEYCHUK
Affiliation:
Russian Federal Nuclear Center, All-Russian Scientific Research Institute of Technical Physics, P.O. 245, Snezhinsk Chelyabinsk Region, Russia 456770
N.S. ES'KOV
Affiliation:
Russian Federal Nuclear Center, All-Russian Scientific Research Institute of Technical Physics, P.O. 245, Snezhinsk Chelyabinsk Region, Russia 456770
O.S. IIYUTINA
Affiliation:
Russian Federal Nuclear Center, All-Russian Scientific Research Institute of Technical Physics, P.O. 245, Snezhinsk Chelyabinsk Region, Russia 456770
O.M. KOZYREV
Affiliation:
Russian Federal Nuclear Center, All-Russian Scientific Research Institute of Technical Physics, P.O. 245, Snezhinsk Chelyabinsk Region, Russia 456770
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Abstract

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A 3D numerical study of the turbulent phase of the evolution of Rayleigh–Taylor instability (RTI) was undertaken using the MAH-3 code. A criterion and a technique have been developed that can be used for diagnostics in computational experiments studying flow transition to self-similar turbulence. It has been found that a criterion of the flow transition to the self-similar turbulence is Kolmogorov's self-similar distribution of the turbulent kinetic energy together with the square law of mixing zone extension. The technique is based on the analysis of the evolution of the dimensionless power spectrum of specific kinetic energy. Three phases of nonlinear mixing are found: “relict chaos”, “formation of classical energy spectrum” and “spectrum degradation.” Determination of a proportionality factor for a square law within the time range incorporating inertial interval gives the value of α ≈ 0.07.

Type
ZABABAKHIN SPECIAL PAPERS
Information
Laser and Particle Beams , Volume 18 , Issue 2 , April 2000 , pp. 175 - 181
Copyright
© 2000 Cambridge University Press