Étude numérique de la convection mixte dans une cavité en forme de « T » soumise à un flux de chaleur constant et ventilée par le bas à l'aide d'un jet d'air vertical

Abstract

A numerical study of the mixed convection is presented in a “T” form cavity, heated with constant heat flux and submitted to a vertical jet of fresh air from below. The heating blocks are identical and the system presents a symmetry with respect to a vertical axis passing by the middle of the openings. The governing equations are solved using the finite difference method. The parameters of control are the Rayleigh number (0⩽Ra⩽10⁶), the Reynolds number (1⩽Re⩽1000), the Prandtl number (Pr=0.72), the relative height of the heating blocks (B=h/H=0.5), the dimension C of admission and evacuation openings (C=l/L=0.15) and the relative distance D between the blocks (D=d/L=0.50). The results obtained, with H/L=1, show the existence of multiple solutions on which the resulting heat transfer depends significantly. To cite this article: M. Najam et al., C. R. Mecanique 330 (2002) 461–467.