Determination of the surfaces radiosity temperatures in a square cavity with a square inner centred obstacle and a non-isothermal absorbing-emitting medium
| Autor: | J.S. Djeumegni, V. Le Dez, M. Lazard |
|---|---|
| Přispěvatelé: | Institut Pprime (PPRIME), ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers, Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Opacity Inner obstacle 020209 energy Semi-analytical Radiosity (computer graphics) 02 engineering and technology 01 natural sciences Isothermal process Square (algebra) 010305 fluids & plasmas symbols.namesake [SPI]Engineering Sciences [physics] 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Radiative transfer Radiosity temperatures [PHYS]Physics [physics] General Engineering Condensed Matter Physics Computational physics Obstacle Attenuation coefficient symbols Diffusely reflecting surfaces Absorbing-emitting medium Gaussian quadrature |
| Zdroj: | International Journal of Thermal Sciences International Journal of Thermal Sciences, Elsevier, 2021, 165, pp.106953. ⟨10.1016/j.ijthermalsci.2021.106953⟩ |
| ISSN: | 1290-0729 |
| DOI: | 10.1016/j.ijthermalsci.2021.106953⟩ |
| Popis: | International audience; An exact semi-analytical determination of the radiosity temperatures on the diffusely reflecting surfaces of a square cavity filled with a non-isothermal absorbing and emitting semi-transparent medium containing a centred reflecting opaque obstacle is proposed. One develops first the obstacle's surfaces radiosity temperatures formulation before detailing all the different possible configurations existing for the cavity's surfaces radiosity temperatures determination. Thanks to the radiosity technique, the integrals solutions of the radiative transfer equation are calculated for all listed cases. Then, the numerical results of the radiosity temperatures are obtained from a Gauss quadrature and an adequate meshing grid, following an iterative scheme. The effects of different parameters such as the size of the internal obstacle, the emissivities and the absorption coefficient on the cavity's radiosity temperatures behaviour have also been investigated. |
| Databáze: | OpenAIRE |
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