کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1896507 1044435 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mean wind: Its velocity and temperature fluctuation in low-Prandtl-number thermal convection
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات کاربردی
پیش نمایش صفحه اول مقاله
Mean wind: Its velocity and temperature fluctuation in low-Prandtl-number thermal convection
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica D: Nonlinear Phenomena - Volume 239, Issue 14, 15 July 2010, Pages 1353–1358
نویسندگان
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