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Role of thermal and flow characteristics on entropy generation during natural convection in porous enclosures with curved walls subjected to Rayleigh-Bénard heating

par Biswal, Pratibha ;Basak, Tanmay
Référence International Journal of Heat and Mass Transfer, 109, page (1261-1280)
Publication Publié, 2017

Article révisé par les pairs

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Résumé :

The comprehensive analysis of natural convection within various enclosures with the concave and convex horizontal walls involving the classical Rayleigh-Bénard heating (hot bottom wall, cold top wall and adiabatic side walls) is carried out via the entropy generation approach. Galerkin finite element method is employed to obtain the solutions in terms of the isotherms (θ), streamlines (ψ), entropy generation (Sθ,Sψ and Stotal) and average heat transfer rates (Nut‾) for a selected range of Darcy numbers (10-5⩽Dam⩽10-2), Prandtl numbers (Prm