Origin of the Temperature Oscillation in Turbulent Thermal Convection
Fluid Dynamics
2009-11-13 v2
Abstract
We report an experimental study of the three-dimensional spatial structure of the low frequency temperature oscillations in a cylindrical Rayleigh-B\'{e}nard convection cell. It is found that thermal plumes are not emitted periodically, but randomly and continuously, from the top and bottom plates. We further found that the oscillation of the temperature field does not originate from the boundary layers, but rather is a result of the horizontal motion of the hot ascending and cold descending fluids being modulated by the twisting and sloshing motion of the bulk flow field.
Keywords
Cite
@article{arxiv.0806.4882,
title = {Origin of the Temperature Oscillation in Turbulent Thermal Convection},
author = {Heng-Dong Xi and Sheng-Qi Zhou and Quan Zhou and Tak-Shing Chan and Ke-Qing Xia},
journal= {arXiv preprint arXiv:0806.4882},
year = {2009}
}
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5 figures