THE QUASIDIFFUSION METHOD FOR TRANSPORT PROBLEMS ON ADAPTIVE-LIKE ARBITRARY QUADRILATERAL MESHES IN 2D R-Z GEOMETRY

摘要

In multiphysics settings, such as coupled radiative transfer and hydrodynamics, spatialmeshes are often not dictated by the radiation transport problem. Such meshes can becomeunstructured, highly complicated, and can change over time. This requires either mappingbetween the grids used for hydrodynamics and radiation transport or that the discretizationmethod used for transport be able to treat the grids arising from hydrodynamics. We presenta Quasidiffusion (QD) method for solving steady state transport problems in r-z geometryon unstructured quadrilateral meshes based on an advanced cell-local discretization ofthe low-order QD equations. Results are given to demonstrate the performance of thedeveloped method.