null

论文期刊

论文标题    Centrifugal-Force-Induced Flow Bifurcations in Turbulent Thermal Convection
作者    Yun-Bing Hu, Shi-Di Huang, Yi-Chao Xie (谢毅超), and Ke-Qing Xia
发表/完成日期    2021-12-09
期刊名称    Physical Review Letters
期卷    127
相关文章    PhysRevLett.127.244501.pdf   
论文简介    An important and unresolved issue in rotating thermal turbulence is when the flow starts to feel the centrifugal effect. This onset problem is studied here by a novel experiment in which the centrifugal force can be varied over a wide range at fixed Rossby numbers by offsetting the apparatus from the rotation axis. Our experiment clearly shows that the centrifugal force starts to separate the hot and cold fluids at the onset Froude number 0.04. Additionally, this flow bifurcation leads to an unexpected heat transport enhancement and the existence of an optimal state. Based on the dynamical balance and characteristics of local flow structures, both the onset and optimal states are quantitatively explained.
返回