2D and 3D Properties of Stably Stratified Turbulence

被引：2

作者：

Kimura, Yoshifumi ^{[1
]}

Sullivan, Peter P. ^{[2
]}

机构：

[1] Nagoya Univ, Grad Sch Math, Furo Cho,Chikusa Ku, Nagoya 4648602, Japan

[2] Natl Ctr Atmospher Res, Meoscale & Microscale Meteorol, Boulder, CO 80301 USA

来源：

ATMOSPHERE | 2024年 / 15卷 / 01期

基金：

日本学术振兴会;

关键词：

stratified turbulence; buoyancy scale; Ozmidov scale; Kolmogorov scale; Craya-Herring decomposition; temperature front; cliff-ramp structures; VELOCITY STRUCTURE FUNCTIONS; UPPER TROPOSPHERE; DIFFUSION; SIMULATION; SPECTRA;

D O I：

10.3390/atmos15010082

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Through interactions between the modes of "waves" and "vortices", stably stratified turbulence exhibits characteristic features both in 2D and 3D. Using DNS of the Navier-Stokes equations coupled to an equation for temperature (the Bousinessq system), we investigate dynamical properties of stably stratified turbulence. After reviewing the importance of three characteristic length scales and their relations in stably stratified turbulence, we present numerical results showing how structures and spectra develop with the growth of the length scales. It is demonstrated that the temperature fluctuations make sharp fronts vertically which result in non-symmetric PDFs of the vertical derivative partial differential z theta.

引用

页数：13

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