Open AccessAdvanced Approach for Radiation Transport Description in 3D Collisional-radiative Models
Author(s) -
Dmitry Kalanov,
Yu. B. Golubovskiǐ,
Dirk Uhrlandt,
Sergey Gortschakow
Publication year - 2017
Publication title -
plasma physics and technology
Language(s) - English
Resource type - Journals
eISSN - 2336-2634
pISSN - 2336-2626
DOI - 10.14311/ppt.2017.2.112
Subject(s) - radiative transfer , discretization , computational physics , physics , radiation transport , range (aeronautics) , convection–diffusion equation , radiation , arc (geometry) , cartesian coordinate system , grid , mechanics , mathematical analysis , mathematics , optics , geometry , materials science , statistics , monte carlo method , composite material
The description of radiation transport phenomena in the frames of collisional-radiative models requires the solution of Holstein-Biberman equation. An advanced solutuion method for 3D plasma obejcts is proposed. The method is applicable for various line contours in a wide range of absorption coecients. Developed approach is based on discretization of the arbitrary plasma volume on a Cartesian voxel grid. Transport of photons between the cells is computed using the ray traversal algorithm by Amanatides [1]. Solution of the particle balance equations with computed in advance radiative transfer matrix is demonstrated for various typical arc shapes, like e.g. free-burning arc and cylindric arc. Results are compared with corresponding calculations using previously developed approaches. As the method is suited for nite geometries and allows for a strict solution of the radiation transport equation, applicability ranges of previous approximations can be specied.