INFLUENCE OF THE GEOMETRIC PARAMETER ON THE REGIMES OF NATURAL CONVECTION AND THERMAL SURFACE RADIATION IN A CLOSED PARALLELEPIPED

We have performed a numerical analysis of the stationary regimes of thermogravitational convection and thermal surface radiation in a closed differentially heated parallelepiped. The mathematical model formulated in dimensionless natural velocity–pressure–temperature variables was realized numerically in the control volume approach. Analysis of the radiative heat exchange was carried out on the basis of the surface radiation approach with the use of the balance method in the Polyak variant. We have obtained three-dimensional temperature and velocity fi elds, as well as dependences for the mean Nusselt number refl ecting the infl uence of the geometric parameter, the Rayleigh number, and the reduced emissive factor of the walls on the fl ow structure and the heat transfer.
   
Author:  S. G. Martyushev, I. V. Miroshnichenko, and M. A. Sheremetb,
Keywords:  natural convection, thermal surface radiation, diathermal medium, parallelepiped, control volume approach
Page:  1522