Paper presented at the 8th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Mauritius, 11-13 July, 2011.
The present problem deals with the numerical study of twodimensional,
steady, incompressible, laminar natural
convection in air filled cavity with a centrally heated bottom
wall and cooled upper wall. The vertical walls and the rest of
the bottom walls are assumed to be insulated. Results are
presented for Ra = 103 - 3´106, A = 1-3, W = 0.25 - 1 and
Pr = 0.7. The governing equations, written in terms of streamfunction-
vorticity formulation, are solved using a finite
volume method. The influence of heated surface dimension
on the fluid flow and thermal patterns is also presented by
comparing the present results against those obtained by the
author in an earlier study within a square cavity heated from
below. Based on numerical data a correlation has been
developed for convective heat transfer.