THERMAL SCIENCE

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Sabar Hamimid

,

Messaoud Guellal

NUMERICAL ANALYSIS OF COMBINED NATURAL CONVECTION-INTERNAL HEAT GENERATION SOURCE-SURFACE RADIATION

ABSTRACT
Numerical study of combined laminar natural convection and surface radiation with internal heat generation is presented in this paper and computations are performed for an air-filled square cavity whose four walls have the same emissivity. Finite volume method through the concepts of staggered grid and SIMPLER algorithm has been applied, and the view factors are determined by analytical formula. A power scheme is also used in approximating advection-diffusion terms. Representative results illustrating the effects of emissivity and the internal heat generation on the streamlines and temperature contours within the enclosure are reported. In addition, obtained results for local and average convective and radiative Nusselt, for various parametric conditions, show that internal heat generation modifies significantly the flow and temperature fields.
KEYWORDS
natural convection, heat generation, surface radiation, numerical simulation
PAPER SUBMITTED: 2014-03-15
PAPER REVISED: 2014-08-17
PAPER ACCEPTED: 2014-08-17
PUBLISHED ONLINE: 2014-10-05
DOI REFERENCE: https://doi.org/10.2298/TSCI140315115H
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Issue 6, PAGES [1879 - 1889]
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Numerical analysis of combined natural convection-internal heat generation source-surface radiation

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