Improved steady-state diffusion approximation with an anisotropic point source and the delta-Eddington phase function.
Using the algebra transformation method, we develop and demonstrate the use of the delta-P(1) approximation to improve steady-state radiative-transfer estimates on spatial scales comparable to the mean free path. We show that the delta-P(1) approximation agrees well with Monte Carlo simulation from source to infinity when we choose an appropriate parameter f (fractional portion that scatters directly forward) in the delta-Eddington phase function. We also provide the empirical formula to determine the parameter f.
Chai
Chenggang
C
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China.
Chen
Yaqin
Y
Li
Pengcheng
P
Luo
Qingming
Q