| Summary: | In this paper is reported an analytical and numerical study on double-diffusive natural convection in a non-Newtonian
power-law fluid confined in a shallow horizontal rectangular enclosure submitted to uniform heat and mass fluxes
along its short vertical sides, while the horizontal ones are insulated and impermeable. Here, the cases of aiding and
opposing thermal and solutal buoyancy forces of equal intensities are considered. In the first part of the work the full
governing equations are solved and the effects of the power-law behavior index, n, and the generalized thermal
Rayleigh number, RaT , are examined and analyzed. In the second part, an analytical solution, based on the parallel
flow approximation valid in the case of a shallow cavity, is proposed and an excellent agreement of results between
the two approaches is observed, which validates them mutually.
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