侧加热腔内的自然对流

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doi:10.6052/1000-0992-14-003

徐丰^,,
崔会敏

北京交通大学土建学院, 北京100044

基金项目:国家自然科学基金(11142015 和11272045) 及高等学校学科创新引智111 计划(B13002) 资助

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通讯作者:
徐丰, 北京交通大学土建学院教授, 博士生导师. 先后在中国科学院力学研究所和澳大利亚詹姆士库克大学及悉尼大学等学术机构任职, 现主要从事有关自然对流方面的理论、实验和计算等研究工作.

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出版历程
- 收稿日期:2014-01-06
- 刊出日期:2014-11-30

Natural convection in a differentially heated cavity

Feng XU^,,
Huimin CUI

School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China

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Corresponding author:Feng XU

摘要

摘要:开展侧加热腔内自然对流的研究具有重大的环境及工业应用背景. 总结侧加热腔内水平温差驱动的自然对流的最新研究进展, 并概述相应的流动性质、动力机制和传热特性以及对不同无量纲控制参数的依赖也有重要的科学价值. 已取得的研究结果显示突然侧加热的腔内自然对流的发展可包括初始阶段、过渡阶段和定常或准定常阶段. 不同发展阶段的流动依赖于瑞利数、普朗特数及腔体的高宽比, 且定常或准定常阶段的流态可以是定常层流流动、非定常周期性流动或者湍流流动. 此外, 回顾了对流流动失稳机制的研究成果以及湍流自然对流方面的新进展. 最后, 展望了侧加热腔内的自然对流研究的前景.
- 自然对流/
- 侧加热腔/
- 时间依赖
Abstract:The study of natural convection in a differentially heated cavity is of practical significance in nature and industry. It is of scientific value to review the studies of natural convection flows, their flow properties, dynamical mechanisms, dimensional controlling parameter dependencies and heat transfer driven by the horizontal temperature gradient in the cavity. As shown by previous studies, the development of natural convection suddenly enforced by the horizontal temperature gradient between the sidewalls of the cavity includes an initial stage, a transitional stage and a steady or a quasi-steady stage. The transient flows in the different stages are determined by the Rayleigh number, the Prandtl number and the aspect ratio. The flow in the steady or quasi-steady stage could be a steady laminar, a periodic or a turbulent flow. In addition, the studies of instability and turbulence of natural convection in the cavity are reviewed, and the prospects for the study of natural convection in the cavity are presented.
- natural convection/
- a differentially heated cavity/
- time-dependent

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