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Local temperature measurements in turbulent rotating Rayleigh-Benard convection

Summary: Local temperature measurements in turbulent rotating
Rayleigh-B´enard convection
Yuanming Liu1, 2,
and Robert E. Ecke1, 2
Center for Nonlinear Studies
Condensed Matter and Thermal Physics Group
Los Alamos National Laboratory, Los Alamos, NM 87545
(Dated: May 9, 2011)
We present local temperature measurements of turbulent Rayleigh-B´enard convection with ro-
tation about a vertical axis. The fluid, water with Prandtl number about 6, was confined in a cell
with a square cross section of 7.3 × 7.3 cm2 and a height of 9.4 cm. Temperature fluctuations and
boundary-layer profiles were measured for Rayleigh numbers 1 × 107 < Ra < 5 × 108 and Taylor
numbers 0 < Ta < 5 × 109. We present statistics of the temperature field measured by a single
thermistor located along the vertical centerline of the cell or by an array of thermistors distributed
laterally from that centerline. The statistics include the mean temperature, standard deviation,
skewness, and the probability distribution functions at various locations in the cell, especially near
and inside the thermal boundary layer. The effects of rotation on these quantities are discussed


Source: Ahlers, Guenter - Department of Physics, University of California at Santa Barbara


Collections: Physics