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Combined effect of natural convection and non-gray gas radiation with partial heating

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Abstract

The present paper reports numerical results of combined effects of non-gray gas radiation and natural convection between two vertical plates with partial heating at walls. The plates are symmetrical and made of two equal zones alternately isotherm and insulated. The idea is to predict that thermal radiation will attenuate the difference pre-established in the literature, between choosing a partial heating from the top and the bottom of the wall. Computations are carried out to establish flow and temperature fields of the fluid in the enclosure. The effect of enclosure dimensions and boundary conditions are analyzed. Using the computed temperature fields, the mean Nusselt number is calculated. The results show that there is no major influence of two-dimensional radiation to reduce the difference between the reported top and bottom heating for the chosen gas.

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Authors and Affiliations

  1. The Institute of Applied Sciences and Technology of Mahdia, University of Monastir, Sidi Messaoud, 5111, Mahdia, Tunisia

    A Mazgar

  2. The Research Unit of Ionized and Reactive Media Study, The Preparatory Institute for Engineering Studies of Monastir, University of Monastir, 5019, Monastir, Tunisia

    A Mazgar & F Ben Nejma

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  1. A Mazgar
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  2. F Ben Nejma
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Correspondence to A Mazgar.

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Mazgar, A., Ben Nejma, F. Combined effect of natural convection and non-gray gas radiation with partial heating. Sādhanā 41, 805–815 (2016). https://doi.org/10.1007/s12046-016-0514-7

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  • DOI: https://doi.org/10.1007/s12046-016-0514-7

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