Article ID Journal Published Year Pages File Type
1896507 Physica D: Nonlinear Phenomena 2010 6 Pages PDF
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.

Related Topics
Physical Sciences and Engineering Mathematics Applied Mathematics
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