Inertial-range anisotropy in Rayleigh-Taylor turbulence

被引：32

作者：

Soulard, Olivier ^{[1
]}

Griffond, Jerome ^{[1
]}

机构：

[1] CEA, DAM, DIF, F-91297 Arpajon, France

来源：

PHYSICS OF FLUIDS | 2012年 / 24卷 / 02期

关键词：

flow simulation; mixing; numerical analysis; Rayleigh-Taylor instability; turbulence; DYNAMICAL MODEL; PASSIVE SCALARS; SHEAR-FLOW; SPECTRUM; DRIVEN;

D O I：

10.1063/1.3680871

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In this work, the spectral equilibrium theory of Ishihara [Phys. Rev. Lett. 88, 154501 (2002)] is applied to Rayleigh-Taylor turbulence. With the help of Canuto and Dubovikov's model [V. Canuto and M. Dubovikov, Phys. Fluids 8, 571 (1996)] closed expressions for the anisotropic spectra of velocity and density, valid in the inertial range, are derived. Based on this result, the main properties of Rayleigh-Taylor turbulence at small scales are discussed. These theoretical results are compared against a direct numerical simulation of a Rayleigh-Taylor mixing zone. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3680871]

引用

页数：25

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