期刊
JOURNAL OF FLUID MECHANICS
卷 919, 期 -, 页码 -出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2021.393
关键词
Benard convection; turbulent convection
资金
- Major Research Plan of National Natural Science Foundation of China for Turbulent Structures [91852107, 91752202]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB42000000]
This study proposes the possibility of spatial decoupling of the thermal boundary layer from the viscous boundary layer in turbulent convection through numerical experiments, demonstrating the corresponding scaling laws under ultimate regime conditions and supporting the physical conjecture of ultimate regime for turbulent convection.
Turbulent convection plays a crucial role in many natural environments and engineering applications. One of the most fundamental questions is how the heat flux depends on the thermal driving and fluid property. It has been proposed that when the fluid layer experiences extremely strong thermal driving, the boundary layers will become fully turbulent and the so-called ultimate regime will emerge. In this work we proposed a numerical experiment in which the thermal boundary layer can be spatially decoupled with the viscous one. We demonstrate that, once the thermal boundary layer is fully decoupled from the viscous boundary layer and locates entirely inside the turbulent bulk, the scaling laws corresponding to the ultimate regime can be obtained, namely and with being the Nusselt number, the Reynolds number, the Rayleigh number and the Prandtl number, respectively. Therefore, our results support the physical conjecture of the ultimate regime for the turbulent convection.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据