Improved discretization of the wavelength derivative term in CMF operator splitting numerical radiative transfer

Details Improved discretization of the wavelength derivative term in CMF operator splitting numerical radiative transfer Improved discretization of the wavelength derivative term in CMF operator splitting numerical radiative transfer

2004-01-09

arxiv.org/abs/astro-ph/0401164v1

Astron.Astrophys. 417 (2004) 317-324

Astronomy and Astrophysics

Astrophysics

9 pages, 9 figures, A&A, in press

Scientific paper

10.1051/0004-6361:20034473

We describe two separate wavelength discretization schemes that can be used in the numerical solution of the comoving frame radiative transfer equation. We present an improved second order discretization scheme and show that it leads to significantly less numerical diffusion than previous scheme. We also show that due to the nature of the second order term in some extreme cases it can become numerically unstable. We stabilize the scheme by introducing a mixed discretization scheme and present the results from several test calculations.

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