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Anais da Academia Brasileira de Ciências

Print version ISSN 0001-3765On-line version ISSN 1678-2690

Abstract

PADET, JACQUES; COTTA, RENATO M.; MLADIN, EMILIA C.  and  PADET, COLETTE. Mixed thermal convection: fundamental issues and analysis of the planar case. An. Acad. Bras. Ciênc. [online]. 2015, vol.87, n.3, pp.1865-1885.  Epub Aug 25, 2015. ISSN 1678-2690.  https://doi.org/10.1590/0001-3765201520140254.

This paper aims to renew interest on mixed thermal convection research and to emphasize three issues that arise from the present analysis: (i) a clear definition of the reference temperature in the Boussinesq approximation; (ii) a practical delimitation of the three convective modes, which are the forced convection (FC), mixed convection (MC) and natural (or free) convection (NC); (iii) and, finally, a uniform description of the set FC/MC/NC in the similarity framework. The planar case, for which analytical solutions are available, allows a detailed illustration of the answers here advanced to the above issues.

Keywords : mixed convection; Boussinesq approximation; similarity; buoyancy forces; entropy production; reverse flow.

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