首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Contrasting turbulence in stably stratified flows and thermal convection
【24h】

Contrasting turbulence in stably stratified flows and thermal convection

机译:稳定分层流动和热对比的对比湍流

获取原文
获取原文并翻译 | 示例
           

摘要

The properties of stably stratified turbulence and turbulent thermal convection are contrasted in this paper. A key difference between theses flows is the sign of the kinetic energy feed by buoyancy F-B. For SST, F-B < 0 due to its stable nature; consequently, the kinetic energy flux Pi(u)(k) decreases with wavenumber k that leads to a steep kinetic energy spectrum, E-u(k) similar to k(-11/5). Turbulent convection is unstable, hence F-B > 0 that leads to an increase of Pi(u)(k) with k; this increase however, is marginal due to relatively weak buoyancy, hence E-u(k) similar to k(-5/3), similar to that in hydrodynamic turbulence. This paper also describes the conserved fluxes for the above systems.
机译:本文对稳定分层湍流和湍流热对比的性质形成对比。 这些流量之间的关键差异是浮力F-B的动能饲料的标志。 对于SST,F-B <0由于其稳定的性质; 因此,动能通量Pi(u)(k)随着波数k而导致陡峭的动能谱,类似于k(-11/5)的e-u(k)。 湍流对流不稳定,因此F-B> 0导致PI(u)(k)的增加; 然而,由于浮力相对较弱,因此与k(-5/3)相似的E-u(k),这种增加是边缘的,类似于水动力湍流中的e-u(k)。 本文还描述了上述系统的保守助护剂。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号