Name
Title | ||
|---|---|---|
On the use of flux limiters in the discrete ordinates method for 3D radiation calculations in absorbing and scattering media |
Abstract | ||
|---|---|---|
The application of flux limiters to the discrete ordinates method (DOM), S"N, for radiative transfer calculations is discussed and analyzed for 3D enclosures for cases in which the intensities are strongly coupled to each other such as: radiative equilibrium and scattering media. A Newton-Krylov iterative method (GMRES) solves the final systems of linear equations along with a domain decomposition strategy for parallel computation using message passing libraries in a distributed memory system. Ray effects due to angular discretization and errors due to domain decomposition are minimized until small variations are introduced by these effects in order to focus on the influence of flux limiters on errors due to spatial discretization, known as numerical diffusion, smearing or false scattering. Results are presented for the DOM-integrated quantities such as heat flux, irradiation and emission. A variety of flux limiters are compared to ''exact'' solutions available in the literature, such as the integral solution of the RTE for pure absorbing-emitting media and isotropic scattering cases and a Monte Carlo solution for a forward scattering case. Additionally, a non-homogeneous 3D enclosure is included to extend the use of flux limiters to more practical cases. The overall balance of convergence, accuracy, speed and stability using flux limiters is shown to be superior compared to step schemes for any test case. |
Year | DOI | Venue |
|---|---|---|
2010 | 10.1016/j.jcp.2009.12.037 | J. Comput. Physics |
Keywords | Field | DocType |
tvd schemes,heat flux,flux limiter,discrete ordinates method,scattering case,radiative transfer equation (rte),flux limiters,false scattering,radiation calculation,radiation heat transfer,newton–krylov gmres,domain decomposition,discrete ordinates method (dom),newton-krylov iterative method,non-homogeneous 3d media,scattering media,monte carlo solution,isotropic scattering case,distributed memory,exact solution,iteration method,radiative transfer equation,heat transfer,monte carlo,linear equations,radiative transfer,parallel computer,message passing | Discretization,Mathematical optimization,Monte Carlo method,Heat flux,System of linear equations,Mathematical analysis,Scattering,Radiative transfer,Flux limiter,Mathematics,Domain decomposition methods | Journal |
Volume | Issue | ISSN |
229 | 9 | Journal of Computational Physics |
Citations | PageRank | References |
8 | 0.62 | 1 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| William F. Godoy | 1 | 13 | 1.53 |
| Paul E. DesJardin | 2 | 8 | 0.62 |