Transient radiative heat transfer from a sphere surrounded by a participating medium
- Rice Univ., Houston, TX (United States)
Transient radiative cooling of a solid or liquid sphere in space, surrounded by a radiatively participating vapor cloud, is considered. A quasi-steady assumption is applied to the radiation transfer in the medium, with the unsteadiness being retained at the inner spherical boundary. The problem is solved by applying the third-order (P{sub 3}) spherical harmonics approximation to the radiative transfer equation for the participating cloud, and a finite difference scheme for transient conduction in the sphere. In general, the presence of a participating medium decreases the cooling rate of the sphere, and cooling curves are presented to show this effect. Effective emissivity of the surface in the presence of a surrounding medium is evaluated, and an approximate explicit equation is given.
- OSTI ID:
- 6064003
- Journal Information:
- Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 111:3; ISSN 0022-1481; ISSN JHTRA
- Country of Publication:
- United States
- Language:
- English
Similar Records
A comparison of electromagnetic wave and radiative transfer equation analyses of a coal particle surrounded by a soot cloud
3D radiative transfer in weakly inhomogeneous medium. Part 1: Diffusive approximation