Abstract
The classical Rayleigh-B�nard theory, for the onset of convection
in a horizontal layer uniformly heated from below, has been applied
to a bidisperse porous medium. The linear stability analysis leads
to an expression for the critical Rayleigh number as a function of
a Darcy number, two volume fractions, a permeability ratio, a thermal
capacity ratio, a thermal conductivity ratio, an inter-phase heat
transfer parameter and an inter-phase momentum transfer parameter.
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