@Article{CiCP-8-5, author = {}, title = {Derivation of a Non-Local Model for Diffusion Asymptotics — Application to Radiative Transfer Problems}, journal = {Communications in Computational Physics}, year = {2010}, volume = {8}, number = {5}, pages = {1139--1182}, abstract = {
In this paper, we introduce a moment closure which is intended to provide a macroscopic approximation of the evolution of a particle distribution function, solution of a kinetic equation. This closure is of non-local type in the sense that it involves convolution or pseudo-differential operators. We show it is consistent with the diffusion limit and we propose numerical approximations to treat the non-local terms. We illustrate how this approach can be incorporated in complex models involving a coupling with hydrodynamic equations, by treating examples arising in radiative transfer. We pay a specific attention to the conservation of the total energy by the numerical scheme.
}, issn = {1991-7120}, doi = {https://doi.org/10.4208/cicp.211009.100310a}, url = {https://global-sci.com/article/81066/derivation-of-a-non-local-model-for-diffusion-asymptotics-application-to-radiative-transfer-problems} }