1. 上海大学 力学与工程科学学院,上海市应用数学和力学研究所,上海,200072
2. 西北工业大学 航空学院,西安,710072
3. 西北工业大学 极端力学研究院,西安,710072
陈鑫(1993-),男,江苏人,博士后,研究方向:热湍流,实验流体力学. E-mail:xinchen99@shu.edu.cn
郗恒东*,教授,研究方向:热湍流,高聚物湍流,实验流体力学. E-mail:hengdongxi@nwpu.edu.cn
纸质出版:2022
移动端阅览
陈鑫, 郗恒东. 瑞利-伯纳德热湍流中的多湍流态现象[J]. 空气动力学学报, 2022, 40(2): 147−155.
CHEN Xin, XI Hengdong. Multiple flow states in turbulent Rayleigh-Bénard convection[J]. 2022, 40(2): 147-155.
陈鑫, 郗恒东. 瑞利-伯纳德热湍流中的多湍流态现象[J]. 空气动力学学报, 2022, 40(2): 147−155. DOI: 10.7638/kqdlxxb-2022.0002
CHEN Xin, XI Hengdong. Multiple flow states in turbulent Rayleigh-Bénard convection[J]. 2022, 40(2): 147-155. DOI: 10.7638/kqdlxxb-2022.0002.
热湍流现象是自然界以及生产生活中很普遍的现象,它源于温差导致的密度差引起的自然对流。瑞利-伯纳德(Rayleigh-Bénard,RB)热湍流系统是从众多自然现象、工程实际中抽象出来的研究热湍流的经典流体力学模型系统。在过去的几十年间,瑞利-伯纳德热湍流系统被广泛用来研究湍流热输运、流动结构演化等特性。最近的研究发现即使在相同的控制参数下,RB热湍流系统中的大尺度流动存在不同的湍流态(结构),且不同的湍流态对应着不同的热输运效率。因此,理解不同的湍流态(结构)的产生机制有助于调控系统的热输运效率。本文就RB热湍流系统中的多湍流态现象
着重评述近年来的若干研究新进展
并对今后的研究工作进行展望。
Thermal turbulence is ubiquitous in nature and industry
which is a kind of convection driven by density difference due to the temperature gradient. Turbulent Rayleigh-Bénard (RB) convection is a basic research paradigm subtracting from the actual complicate problems. In the past decades
RB convection had been widely used to study the turbulent heat transport
flow structure evolution and other fundamental mechanisms. Recently
it is found that under the same control parameters
the RB convection exhibits different turbulent flow states (structures) and there is a one-to-one correspondence between the turbulent flow states and heat transport efficiencies. Thus
uncovering the mechanism of the emergence of different turbulent flow states (structures) is beneficial to control the heat transport efficiency of RB convection. In this paper
we focus on the multiple flow states phenomena in turbulent RB convection and review recent progresses. We also point out the issues and challenges and give an outlook on the future research.
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