Abstract
The influence of temperature-dependent material properties on Rayleigh–Bénard convection is investigated in three different liquids, ranging from a very small Prandtl number for mercury with Pr = 0.0232, over a moderate one for water with Pr = 4.38, to a very large one for glycerol with Pr = 2548. For this purpose, three-dimensional direct numerical simulations were performed in a cylindrical cell with a unity aspect ratio. Local quantities such as the viscous and thermal boundary layer thicknesses, the centre temperature and the wind velocity show a breakdown of the top-bottom symmetry. The intensity of this asymmetry strongly depends on the respective fluid.
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Horn, S., Shishkina, O., Wagner, C. (2014). Non-Oberbeck-Boussinesq Effects in Rayleigh-Bénard Convection of Liquids. In: Deville, M., Estivalezes, JL., Gleize, V., Lê, TH., Terracol, M., Vincent, S. (eds) Turbulence and Interactions. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 125. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-43489-5_12
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DOI: https://doi.org/10.1007/978-3-662-43489-5_12
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-43488-8
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