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Radiation and conduction in an isotropic scattering rectangular medium with one semitransparent and diffusely reflecting boundary / Jian-Feng Luo in Journal of heat transfer, Vol. 132 N° 11 (Novembre 2010) 

Public ISBD [article]  in Journal of heat transfer > Vol. 132 N° 11 (Novembre 2010) . - pp. [112701-1/11] Titre : Radiation and conduction in an isotropic scattering rectangular medium with one semitransparent and diffusely reflecting boundary Type de document : texte imprimé Auteurs : Jian-Feng Luo, Auteur ; Hong-Liang Yi, Auteur ; Sheng-Li Chang, Auteur Année de publication : 2010 Article en page(s) : pp. [112701-1/11] Note générale : Physique Langues : Anglais (eng) Mots-clés : Ray  tracing-node  analyzing  method  2D  rectangular  semitransparent  medium  Diffuse  reflectivity  Transient  Radiation Index. décimale : 536 Chaleur. Thermodynamique Résumé : Using the ray tracing-node analyzing method, the 2D transient coupled radiative and conductive heat transfer in a rectangular semitransparent medium is investigated. The rectangular medium has one semitransparent and diffuse boundary (the other three boundaries are black) and is isotropically scattering. The transient differential energy equation is discretized by the fully implicit finite difference method, and the radiative source term of the energy equation is expressed by the radiative transfer coefficients (RTCs). The integrality and reciprocity relationships of the RTCs without considering scattering for the 2D physical model are discovered, which are much different from those for the 1D case. When solving the isotropic scattering RTCs, the RTCs without considering scattering are normalized at first, and then the normalized RTCs are used to trace the energy scattered by control volumes. Finally, the isotropic scattering RTCs are solved by reverse calculation. The Patankar's linearization method is used to linearize the radiative source term and the opaque boundary conditions, and the boundary conditions are dealt with an additional source term method. The alternating direction implicit method is applied to solve the nominal linearized equations. The effects of scattering albedo, extinction coefficient, refractive index, etc., on transient coupled heat transfer are studied. The study shows that when the extinction coefficient is so small, the increase in scattering albedo can intensify the cooling of the three black surfaces of the rectangular medium. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Radiation and conduction in an isotropic scattering rectangular medium with one semitransparent and diffusely reflecting boundary [texte imprimé] / Jian-Feng Luo, Auteur ; Hong-Liang Yi, Auteur ; Sheng-Li Chang, Auteur . - 2010 . - pp. [112701-1/11]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 132 N° 11 (Novembre 2010) . - pp. [112701-1/11] Mots-clés : Ray  tracing-node  analyzing  method  2D  rectangular  semitransparent  medium  Diffuse  reflectivity  Transient  Radiation Index. décimale : 536 Chaleur. Thermodynamique Résumé : Using the ray tracing-node analyzing method, the 2D transient coupled radiative and conductive heat transfer in a rectangular semitransparent medium is investigated. The rectangular medium has one semitransparent and diffuse boundary (the other three boundaries are black) and is isotropically scattering. The transient differential energy equation is discretized by the fully implicit finite difference method, and the radiative source term of the energy equation is expressed by the radiative transfer coefficients (RTCs). The integrality and reciprocity relationships of the RTCs without considering scattering for the 2D physical model are discovered, which are much different from those for the 1D case. When solving the isotropic scattering RTCs, the RTCs without considering scattering are normalized at first, and then the normalized RTCs are used to trace the energy scattered by control volumes. Finally, the isotropic scattering RTCs are solved by reverse calculation. The Patankar's linearization method is used to linearize the radiative source term and the opaque boundary conditions, and the boundary conditions are dealt with an additional source term method. The alternating direction implicit method is applied to solve the nominal linearized equations. The effects of scattering albedo, extinction coefficient, refractive index, etc., on transient coupled heat transfer are studied. The study shows that when the extinction coefficient is so small, the increase in scattering albedo can intensify the cooling of the three black surfaces of the rectangular medium. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]