ISSN Online: 2377-424X
International Heat Transfer Conference 12
Natural convection in rectangular enclosures heated from below and symmetrically cooled from the top and both sides
摘要
A numerical analysis of steady natural convection in air-filled, 2-D rectangular enclosures heated from below
and symmetrically cooled from the top and both sides is conducted. The temperature and velocity fields are
solved for steady laminar flow under the assumption of isothermal boundary walls. A specifically developed
numerical model based on the SIMPLE algorithm is used for the solution of the mass, momentum and energy
transfer governing equations. Simulations are performed for several values of both the aspect ratio and the
Rayleigh number of the enclosure, whose influence upon the flow structure type and the heat transfer rate are
analyzed and discussed. In addition, the heat transfer rate results obtained are expressed through a dimensionless
correlation.