Journal
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
Volume 76, Issue -, Pages 51-67Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2013.08.012
Keywords
Conjugate natural convection; Surface radiation; Two-dimensional enclosure; Local heat source; Stream function-vorticity formulation
Categories
Funding
- Grants Council (under the President of the Russian Federation) [MK - 5652.2012.8]
- Federal Grant-in-Aid Program Human Capital for Science and Education in Innovative Russia [8345]
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A two-dimensional numerical analysis of combined heat transfer (transient natural convection, surface thermal radiation and conduction) in an air filled square enclosure having heat-conducting solid walls of finite thickness and a local heat source in conditions of convective heat exchange with an environment has been carried out. The governing equations formulated in terms of the dimensionless stream function, vorticity and temperature have been numerically solved using the finite difference method. Particular efforts have been focused on the effects of five types of influential factors such as the Rayleigh number 10(4) <= Ra <= 10(6), the internal surface emissivity 0 <= epsilon < 1, the thermal conductivity ratio 1 <= k(1,2) <= 1000, the ratio of solid wall thickness to cavity spacing 0.1 <= I/L <= 0.3 and the dimensionless time 0 <= tau <= 100 on the fluid flow and heat transfer. Comprehensive Nusselt numbers data are presented as functions of the governing parameters mentioned above. (C) 2013 Elsevier Masson SAS. All rights reserved.
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