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Combined heat transfer of radiation and forced convection flow of participating gases in a three-dimensional recess

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Abstract

This research work presents a numerical investigation of three-dimensional combined convection-radiation heat transfer over a recess including two inclined steps in a horizontal duct. To simulate the inclined surface boundaries, the blocked off method is employed for both fluid mechanic and radiation problems. The fluid is treated as a gray, absorbing, emitting and scattering medium. In numerical solution of the governing equations including conservation of mass, momentum and energy, the three-dimensional Cartesian coordinate system is used. These equations are solved numerically using the CFD techniques to obtain the temperature and velocity fields. Discretized forms of the governing equations are obtained by the finite volume method and solved using the SIMPLE algorithm. Since the gas is considered as a radiating medium, all of the convection, conduction and radiation terms are presented in the energy equation. For computation of radiative term in energy equation, the radiative transfer equation (RTE) is solved numerically by the discrete ordinates method (DOM) to find the divergence of radiative heat flux distribution inside the radiating medium. The effects of radiation-conduction parameter, optical thickness and albedo coefficient on heat transfer behavior of the system are presented. Comparison of numerical results with the available data published in open literature shows a good agreement.

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Authors and Affiliations

  1. Mechanical Engineering Department, School of Engineering, Shahid Bahonar University, Kerman, Iran

    Meysam Atashafrooz & Seyyed Abdolreza Gandjalikhan Nassab

Authors
  1. Meysam Atashafrooz
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  2. Seyyed Abdolreza Gandjalikhan Nassab
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Correspondence to Seyyed Abdolreza Gandjalikhan Nassab.

Additional information

Recommended by Associate Editor Jae Dong Chung

Meysam Atashafrooz is a Ph.D candidate in mechanical engineering in the Faculty of Engineering, Shahid Bahonar University, Kerman, Iran. He received his B.Sc. and M.Sc. degrees from Shahid Bahonar University of Kerman in 2009 and 2011, respectively. Now, he is working on his Ph.D thesis which is about radiation heat transfer.

Seyyed Abdolreza Gandjalikhan Nassab is a professor in mechanical engineering in the Faculty of Engineering, Shahid Bahonar University, Kerman, Iran. He received his Ph.D degree from Shiraz University, Shiraz, Iran in 1999. He has several published papers about radiation heat transfer and also in the CFD research area.

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Atashafrooz, M., Nassab, S.A.G. Combined heat transfer of radiation and forced convection flow of participating gases in a three-dimensional recess. J Mech Sci Technol 26, 3357–3368 (2012). https://doi.org/10.1007/s12206-012-0804-x

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  • DOI: https://doi.org/10.1007/s12206-012-0804-x

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