Mathematical properties of the SimpleX algorithm

Details Mathematical properties of the SimpleX algorithm Mathematical properties of the SimpleX algorithm

2010-02-24

arxiv.org/abs/1002.4586v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

18 pages, 17 figures, accepted for publication in A&A

Scientific paper

Context. Analytical and numerical analysis of the SimpleX radiative transfer algorithm, which features transport on a Delaunay triangulation. Aims. Verify whether the SimpleX radiative transfer algorithm conforms to mathematical expectations, to develop error analysis and present improvements upon earlier versions of the code. Methods. Voronoi-Delaunay tessellation, classical Markov theory. Results. Quantitative description of the error properties of the SimpleX method. Numerical validation of the method and verification of the analytical results. Improvements in accuracy and speed of the method. Conclusions. It is possible to transport particles such as photons in a physically correct manner with the SimpleX algorithm. This requires the use of weighting schemes or the modification of the point process underlying the transport grid. We have explored and applied several possibilities.

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