Stably stratified flows: A model with no Ri(cr)

被引：78

作者：

Canuto, V. M. ^{[1
,2
]}

Cheng, Y. ^{[3
]}

Howard, A. M. ^{[4
]}

Esau, I. N. ^{[5
]}

机构：

[1] NASA, Goddard Inst Space Studies, New York, NY 10025 USA

[2] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY USA

[3] Columbia Univ, Ctr Climate Syst Res, New York, NY USA

[4] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA

[5] Bjerknes Ctr Climate Res, Nansen Environm & Remote Sensing Ctr, Bergen, Norway

来源：

JOURNAL OF THE ATMOSPHERIC SCIENCES | 2008年 / 65卷 / 07期

关键词：

D O I：

10.1175/2007JAS2470.1

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

A large set of laboratory, direct numerical simulation (DNS), and large eddy simulation (LES) data indicates that in stably stratified flows turbulent mixing exists up to Ri similar to O(100), meaning that there is practically no Ri(cr). On the other hand, traditional local second-order closure (SOC) models entail a critical Ri(cr) similar to O(1) above which turbulence ceases to exist and are therefore unable to explain the above data. The authors suggest how to modify the recent SOC model of Cheng et al. to reproduce the above data for arbitrary Ri.

引用

页码：2437 / 2447

页数：11

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