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Radiation heat transfer in a complex geometry containing anisotropically-scattering mie particles

Ettaleb, A., Abbassi, M.A., Farhat, H., Guedri, K., Omri, A., Borjini, M.N., Goodarzi, M. and Sarafraz, M.M. 2019, Radiation heat transfer in a complex geometry containing anisotropically-scattering mie particles, Energies, vol. 12, no. 20, pp. 1-22, doi: 10.3390/en12203986.

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Title Radiation heat transfer in a complex geometry containing anisotropically-scattering mie particles
Author(s) Ettaleb, A.
Abbassi, M.A.
Farhat, H.
Guedri, K.
Omri, A.
Borjini, M.N.
Goodarzi, M.
Sarafraz, M.M.ORCID iD for Sarafraz, M.M. orcid.org/0000-0002-6347-0216
Journal name Energies
Volume number 12
Issue number 20
Article ID 3986
Start page 1
End page 22
Total pages 22
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2019
ISSN 1996-1073
Keyword(s) Science & Technology
Technology
Energy & Fuels
radiation
blocked-off-region procedure
heat recuperation
anisotropic scattering
mie particles
FINITE-VOLUME METHOD
3-D RADIATION
MEDIA
ENCLOSURES
SIMULATION
NANOFLUID
Summary 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.
Language eng
DOI 10.3390/en12203986
Indigenous content off
Field of Research 02 Physical Sciences
09 Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30142884

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.