Turbulence in a stably stratified fluid: onset of global anisotropy as a function of the Richardson number

Bhattacharjee Jayanta K.; Kumar Abhishek; Verma Mahendra K.

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Turbulence in a stably stratified fluid: onset of global anisotropy as a function of the Richardson number

机译：稳定分层流体中的湍流：作为Richardson号的函数的全局各向异性发作

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It is necessary to introduce an external force to induce turbulence in a stably stratified fluid. The Heisenberg eddy viscosity technique should in this case suffice to calculate a space-time averaged quantity like the global anisotropy parameter as a function of the Richardson number. We find analytically that the anisotropy increases linearly with the Richardson number, with a small quadratic correction. A numerical simulation of the complete equations shows the linear behaviour.

机译：有必要引入外力以诱导稳定分层的流体中的湍流。在这种情况下，Heisenberg涡粘度技术应该足以计算像Richardson号的函数一样的全局各向异性参数等时空平均量。我们在分析上发现各向异性与Richardson号码线性增加，具有小的二次校正。完整方程的数值模拟显示了线性行为。

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《Physica Scripta: An International Journal for Experimental and Theoretical Physics》 |2019年第12期|共10页
作者
Bhattacharjee Jayanta K.; Kumar Abhishek; Verma Mahendra K.;
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作者单位

Indian Assoc Cultivat Sci Dept Theoret Phys Kolkata 700032 India;

Coventry Univ Ctr Fluid &

Complex Syst Coventry CV1 5FB W Midlands England;

Indian Inst Technol Kanpur Dept Phys Kanpur 208016 Uttar Pradesh India;

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原文格式 PDF
正文语种 eng
中图分类物理学;
关键词
turbulence in stratified fluids; Kolmogorov theory; Bolgiano-Obukhov scaling;

机译：分层流体中的湍流;Kolmogorov理论;Bolgiano-Obukhov缩放;

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1. Turbulence in a stably stratified fluid: onset of global anisotropy as a function of the Richardson number [J] . Bhattacharjee Jayanta K., Kumar Abhishek, Verma Mahendra K. Physica Scripta: An International Journal for Experimental and Theoretical Physics . 2019,第12期

机译：稳定分层流体中的湍流：作为Richardson号的函数的全局各向异性发作
2. EXPERIMENTS ON DENSITY-GRADIENT ANISOTROPIES AND SCALAR DISSIPATION OF TURBULENCE IN A STABLY STRATIFIED FLUID [J] . Thoroddsen ST., Vanatta CW. Journal of Fluid Mechanics . 1996,第0期

机译：稳定分层流体中密度梯度各向异性和湍流标量耗散的实验
3. Spectra of internal waves and turbulence in stratified fluids 1. General discussion and indications from measurements in stably stratified atmosphere and ocean [J] . Yih-Ho Pao Radio Science . 1969,第12期

机译：分层流体中的内部波谱和湍流谱1.在稳定的分层大气和海洋中的测量的一般讨论和指示
4. Establishment a criterion for the Onset of Multi Layer Formation in a Circular Cavity Containing Stably Stratified Fluid under Partial Heating Boundary Condition [C] . Jamshid POURESFANDIARY CHAM, Shigeru HINATA, Nobuhiro HIMENO, 14th Annual Conference of the Computational Fluid Dynamics Society of Canada 2006 . 2006

机译：局部加热边界条件下含稳定分层流体的圆腔中多层形成开始的建立标准
5. Settling-driven and double-diffusive instabilities in two-component, stably stratified fluids. [D] . Alsinan, Ahmad A. 2016

机译：两组分稳定分层流体中的沉降驱动和双扩散不稳定性。
6. The instability of stratified flows at large Richardson numbers [O] . Andrew J. Madja, Michael Shefter 1998

机译：理查森数大时分层流动的不稳定性
7. Small-scale anisotropy in stably stratified turbulence [O] . Yukio Kaneda, Kyo Yoshida 2004

机译：小规模各向异性稳定分层湍流
8. Spectra of Internal Waves and Turbulence in Stratified Fluids. Part I. General Discussion and Indications from Measurements in Stably Stratified Atmosphere and Ocean [R] . Pao, Y. H. 1969

机译：分层流体中内波和湍流的光谱。第一部分。稳定分层大气和海洋测量的一般讨论和指示

Turbulence in a stably stratified fluid: onset of global anisotropy as a function of the Richardson number

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