الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 174 |  |  |
| | | from | 174 | | |
Abstract
The timedependent radiation transfer problems in a planeparallel random medium with anisotropic scattering are proposed. In considering radiation transfer problems in planeparallel media we shall distinguish two cases, namely, the semiinfinite medium and the finite medium. We study the effect of anisotropic scattering on radiation transfer in a planeparallel media for the two types of phase functions, namely, one representing linear scattering and the other is Rayleigh scattering. Rayleigh scattering phase function can be considered to be with or without polarization. In case of semiinfinite media, problems admitted a separable exponential solution to give the ensembleaverage for reflectivity, radiant energy and net flux. Calculations are done for transparent and specularreflecting boundary of the semiinfinite random medium with angulardependent externally incident flux. PomraningEddington approximation is used to obtain the solution of the timedependent radiation transfer problems in finite media via the traveling wave transformation which able to transform the timedependent problem into a stationarylike problem. The random medium is considered to consist of tworandomly mixed immiscible fluids, with the mixing statistics described as a twostate homogeneous Markov process to obtain the ensembleaveraged solution. Results of reflectivity and transmissivity are obtained for isotropic and anisotropic scattering. The problem of timedependent polarized radiation transfer in a finite slab medium is also could be solved by suggesting the PomraningEddington approximation for the two functions describing the polarization, namely, the total intensity and the difference function. Hence the average solution was obtained analytically and calculations are done for reflectivity and transmissivity, for the different degrees of polarization