报告内容摘要

In this talk we will report our recent studies on the double diffusive convection. First we will briefly review the turbulence related researches in our group, which includes the multiphase turbulence, the numerical and experimental studies of the Taylor-Couette flow, and the thermal convection flow. Recently, we extend our research to the so-called double diffusive convection flow, which is the buoyancy-driven flow with the fluid density depending on two components. These two components usually has very different molecular diffusivities, such as in the ocean where the ratio of the thermal diffusivity to that of the salinity is around 100. Very rich and interesting phenomena can be found in such flow. Here we conduct a systematically numerical investigation of the double diffusive convection between two parallel plates. We apply the Grossmann-Lohse theory for thermal convection to the current problem and show that the theory can predict the salinity transfer very accurately without introducing any new coefficient. The effects of different boundary condition are also studied. Finally, we will show some preliminary results at very high Rayleigh number.

报告人简介

杨延涛：2004年于2138cn太阳集团古天乐力学与工程科学系获得理学学士学位，2009年于澳门太阳娱乐网站官网获得理学博士学位。2011年4月至2013年4月于2138cn太阳集团古天乐应用物理与技术研究中心”培元学者“博士后。2013年5月至今获荷兰FOM基金会资助在荷兰University of Twente流体物理研究组进行博士后研究。研究领域包括涡动力学、旋转流动、可压缩湍流、浮力驱动对流问题和大规模并行数值计算。至今已在Phys.Rev.Lett.、J. Fluid Mech. 和Phys. Fluids等杂志发表多篇论文，并担任Phys.Rev.Lett.、Phys. Rev. E等杂志审稿人。

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