期刊
PHYSICAL REVIEW LETTERS
卷 94, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.034501
关键词
-
The large-scale circulation, often called wind, in the confined thermal turbulence of mercury is studied experimentally. The instantaneous velocity profile at 128 points is directly measured using ultrasonic velocimetry. The periodic velocity oscillation is observed in the case of the aspect-ratio Gamma=1,2 but not in Gamma=0.5. Its peak frequency is scaled by f(c)proportional toRa(c)(gamma), where Ra is the Rayleigh number and gamma(c)=0.43,0.45 for Gamma=1,2. f(c) is close to the wind circulation frequency f(p), and has the same order of transit time from the bottom to the top of the convection cell. A single roll circulation is expected in Gamma=1; however, axisymmetric toroidal rings may exist near the upper and lower plate for Gamma=0.5, which are stable up to Ra=7x10(10).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据