COI code: JR_ADMTL-13-1_004
Paper Language: English
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Authors Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped FurnaceAmin Al Taha - Department of Mechanical Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran
MohamadMehdi Keshtkar - Department of Mechanical Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran
Abstract:Radiative heat transfer has an important role in many industrial equipment; i.e. furnaces, boilers and high temperature heat exchangers. In this paper, combination of Weighted Sum of Gray Gas Method (WSSGM) and Discrete Ordinate Method (DOM) are used together in order to numerically study the radiative heat transfer behavior in a non-gray participating medium. Moreover, the concept of Blocked-off region for irregular geometries is used to simulate the T-shaped furnace. The effect of different radiative parameters, i.e. scattering coefficient and wall emissivity on thermal behavior and wall heat fluxes is investigated and compared for both gray and non-gray media. The results show thatwhen scattering coefficient increases, more radiation is scattered in the medium and therefore less heat flux reaches the walls such that by increasing scattering coefficient from 1.0 to 5.0, the incident radiative heat flux decreases up to 15% in some parts of bottom wall. It is seen that by increasing wall emissivity from 0.5 to 1.0, wall heat flux increases more than 60%. Moreover, results show that, by increasing the temperature, the maximum error strongly increases which indicates that in many engineering problems, the gray medium assumption leads to great error in results.
Keywords:Blocked-Off, Discrete Ordinate Method, Non-Gray Media, Radiative Heat Transfer, Weighted Sum of Gray Gas Method
COI code: JR_ADMTL-13-1_004
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Al Taha, Amin & MohamadMehdi Keshtkar, 2020, Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped Furnace, International Journal of Advanced Design and Manufacturing Technology 13 (1), https://www.civilica.com/Paper-JR_ADMTL-JR_ADMTL-13-1_004.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Al Taha, Amin & MohamadMehdi Keshtkar, 2020)
Second and more: (Al Taha & Keshtkar, 2020)
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The University/Research Center Information:
Type: Azad University
Paper No.: 6755
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