Non-Oberbeck-Boussinesq effects on the boundary-layer thicknesses

ORAL

Abstract

A measure characterizing non-Oberbeck-Boussinesq effects in Rayleigh-Benard convection is the ratio $\lambda_{bottom}/\lambda_{top}$ between the thicknesses of the boundary-layers formed at the thermal plates (bottom and top). In the present work, we discuss an extension of Prandtl-Pohlhausen theory accounting for height-dependent viscosities and thermal diffusivities.

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Authors

  • Francisco Fontenele Araujo

    • University of Twente

  • Siegfried Grossmann

    • University of Marburg

  • Detlef Lohse

    • University of Twente