Thermal radiation, convection, and conduction in porous media contained in two-dimensional vertical cavities

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910538· OSTI ID:5640696

Bouallou, C; Sacadura, J F ^[1]

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1. Institut National des Sciences Appliquees de Lyon (France)

This publication deals with the modeling of heat transfer by thermal radiation and natural convection in a fluid-saturated semitransparent porous medium contained within a inclinable two-dimensional cavity whose larger boundaries are isothermal and gray, whereas the small boundaries are insulated and reflecting. Applications are mainly relevant to the thermal insulation technologies, due to the wide use of high-porosity insulation in many engineering systems. The model used here is entirely two-dimensional and is based on the P1 approximation for the treatment of thermal radiation in an isotropically scattering semitransparent medium. Such a model is necessary when dealing with small-aspect-ratio cavities or when the convective heat transfer is less important than the radiative transfer.

• OSTI ID: 5640696
• Journal Information: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 113:1; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CAVITIES
CONVECTION
ELECTROMAGNETIC RADIATION
ENERGY TRANSFER
HEAT TRANSFER
ISOTROPY
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
POROUS MATERIALS
RADIANT HEAT TRANSFER
RADIATIONS
THERMAL CONDUCTION
THERMAL INSULATION
THERMAL RADIATION