Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1896507 | Physica D: Nonlinear Phenomena | 2010 | 6 Pages |
Abstract
Large-scale circulation in the confined thermal turbulence of mercury is studied experimentally. The instantaneous velocity profile at 128 points is directly measured using ultrasonic velocimetry and the temperature fluctuation is simultaneously obtained by a small thermistor at the cell center. The periodic velocity oscillation is observed for aspect ratios Γ=1,2Γ=1,2, but for Γ=0.5Γ=0.5. The temperature oscillation is confirmed only in the Γ=2Γ=2 cell. It is found that the flow patterns depending on the aspect ratio are characterized sufficiently by the joint probability density function up to Ra=4×108Ra=4×108.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Applied Mathematics
Authors
Tomohiro Hayakawa, Yoshiyuki Tsuji,