A conjugate gradient method for the solution of the non-LTE line radiation transfer problem

Details A conjugate gradient method for the solution of the non-LTE line radiation transfer problem A conjugate gradient method for the solution of the non-LTE line radiation transfer problem

2009-05-20

arxiv.org/abs/0905.3258v2

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

Research note: 4 pages, 5 figures, accepted to A&A

Scientific paper

This study concerns the fast and accurate solution of the line radiation transfer problem, under non-LTE conditions. We propose and evaluate an alternative iterative scheme to the classical ALI-Jacobi method, and to the more recently proposed Gauss-Seidel and Successive Over-Relaxation (GS/SOR) schemes. Our study is indeed based on the application of a preconditioned bi-conjugate gradient method (BiCG-P). Standard tests, in 1D plane parallel geometry and in the frame of the two-level atom model, with monochromatic scattering, are discussed. Rates of convergence between the previously mentioned iterative schemes are compared, as well as their respective timing properties. The smoothing capability of the BiCG-P method is also demonstrated.

Affiliated with

Also associated with

No associations

Rating

A conjugate gradient method for the solution of the non-LTE line radiation transfer problem does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A conjugate gradient method for the solution of the non-LTE line radiation transfer problem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A conjugate gradient method for the solution of the non-LTE line radiation transfer problem will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-242483