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Two - dimensional modeling of a two - layer porous burner for household applications
#1
Two - dimensional modeling of a two - layer porous burner for household
applications under the influence of a radiation field
M M Keshtkar
Assistant Professor
Islamic Azad University, Kerman Branch
Mkeshtkar54@yahoo.com
Abstract
This work presents a numerical study to investigate the heat transfer characteristics of a 2-D rectangular
composite porous radiant burner (CPRB). In the construction of porous burner, the porous layer is
considered to be composite consisting of upstream and downstream layers with equal thickness but with
different physical and radiative properties. In the present work, a two dimensional rectangular model is
used to solve the governing equations for porous medium and gas flow. In order to analyze the thermal
characteristics of the CPRB, the coupled energy equations for the gas and porous medium are solved
numerically and the discrete ordinates method is used to obtain the distribution of radiative heat flux in
the porous media. Finally, the effects of the various factors on the performance of CPRB are determined.
Computational results show that the high porosity and low scattering coefficient for downstream porous
layer are desirable for maximizing the CPRB efficiency in comparison to homogeneous one. Comparison
between the present results with those obtained by other investigators shows a good agreement.
Keywords: composite porous radiant burners, discrete ordinates method, 2-D radiation field
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