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Rayleigh-Bénard convection in binary-gas mixtures: Thermophysical properties and the onset of convection

1997
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Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
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We present an experimental investigation of Rayleigh-Bénard convection in binary-gas mixtures. In order to interpret the results quantitatively, we determined the necessary thermodynamic and transport properties for six mixtures ͑He-CO 2 , He-SF 6 , He-Xe, Ne-Ar, Ar-CO 2 , and H 2 -Xe͒ by a combination of data from the literature, molecular-theory calculations, and thermal-conductivity measurements. All six mixtures have positive separation ratios ⌿. The Lewis number L ͑the ratio of the mass to

doi:10.1103/physreve.55.6950
fatcat:xz75lbf6hrc7xhzqyu244t4ldq