湍流热对流中的若干问题

对流是自然界中的一种常见现象，与人们的日常生产、生活息息相关。作为湍流和非线性系统的一个简单模型，在20世纪90年代以后，人们对热对流进行了系统而深入的研究。然而，直到现在，人们对湍流热对流的规律和本质仍然所知有限。文章主要从湍流传热、相干结构、大尺度环流和湍流中脉动量的小尺度统计等四个方面，简要地介绍了近年来湍流热对流的一些新进展。

Various issues in turbulent thermal convection

Thermal convection, which has attracted much attention in the past two decades, is a common phenomenon occurring in nature and in many engineering applications. Despite extensive studies of various aspects of convection, our knowledge about its nature remains incomplete. This paper presents an overview of new advances in the studies of turbulent thermal convection mainly from four areas: turbulent heat transport, coherent structures, large-scale circulation, and turbulent fluctuations in small-scale turbulence.