Radiation Heat Transfer in a Complex Geometry Containing Anisotropically-Scattering Mie Particles

Ali Ettaleb, Mohamed Ammar Abbassi, Habib Farhat, Kamel Guedri, Ahmed Omri, Mohamed Naceur Borjini, Marjan Goodarzi and M. M. Sarafraz
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Ali Ettaleb: Unité de Recherche «Matériaux, Energie et Energies Renouvelables» (MEER), Faculté des Sciences de Gafsa, B.P.19-2112 Zarroug-Gafsa, Tunisie
Mohamed Ammar Abbassi: Unité de Recherche «Matériaux, Energie et Energies Renouvelables» (MEER), Faculté des Sciences de Gafsa, B.P.19-2112 Zarroug-Gafsa, Tunisie
Habib Farhat: Laboratoire des Etudes des Milieux Ionisés et Réactifs Avenue Ibn-Eljazzar, 5019 Monastir, Tunisie
Kamel Guedri: Mechanical Engineering Department, College of Engineering and Islamic Architecture, Umm Al-Qura University, Makkah 21955, Saudi Arabia
Ahmed Omri: Unité de Recherche «Matériaux, Energie et Energies Renouvelables» (MEER), Faculté des Sciences de Gafsa, B.P.19-2112 Zarroug-Gafsa, Tunisie
Mohamed Naceur Borjini: Unité de Métrologie et des Systèmes Energétiques, Ecole Nationale d’Ingénieurs de Monastir, Université de Monastir, 5000 Monastir, Tunisie
Marjan Goodarzi: Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam
M. M. Sarafraz: School of Mechanical Engineering, University of Adelaide, Adelaide SA 5005, South Australia, Australia

Energies, 2019, vol. 12, issue 20, 1-22

Abstract: This study aims to numerically investigate the radiation heat transfer in a complex, 3-D biomass pyrolysis reactor which is consisted of two pyrolysis chambers and a heat recuperator. The medium assumes to be gray, absorbs, emits, and Mie-anisotropically scatters the radiation energy. The finite volume method (FVM) is applied to solve the radiation transfer equation (RTE) using the step scheme. To treat the complex geometry, the blocked-off-region procedure is employed. Mie equations (ME) are applied to evaluate the scattering phase function and analyze the angular distribution of the anisotropically scattered radiation by particles. In this study, three different states are considered to test the anisotropic scattering impacts on the temperature and radiation heat flux distribution. These states are as: (i) Isotropic scattering, (ii) forward and backward scattering and (iii) scattering with solid particles of different coals and fly ash. The outcomes demonstrate that the radiation heat flux enhances by an increment of the albedo and absorption coefficients for the coals and fly ash, unlike the isotropic case and the forward and backward scattering functions. Moreover, the particle size parameter does not have an important influence on the radiation heat flux, when the medium is thin optical. Its effect is more noticeable for higher extinction coefficients.

Keywords: radiation; blocked-off-region procedure; heat recuperation; anisotropic scattering; mie particles (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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