Achievable Efficiency of Numerical Methods for Simulations of Solar Surface Convection
Abstract
We investigate the achievable efficiency of both the time and the space discretisation methods used in Antares for mixed parabolic-hyperbolic problems. We show that the fifth order variant of WENO combined with a second order Runge-Kutta scheme is not only more accurate than standard first and second order schemes, but also more efficient taking the computation time into account. Then, we calculate the error decay rates of WENO with several explicit Runge-Kutta schemes for advective and diffusive problems with smooth and non-smooth initial conditions. With this data, we estimate the computational costs of three-dimensional simulations of stellar surface convection and show that SSP RK(3,2) is the most efficient scheme considered in this comparison.
Keywords
Cite
@article{arxiv.1406.1891,
title = {Achievable Efficiency of Numerical Methods for Simulations of Solar Surface Convection},
author = {Hannes Grimm-Strele and Friedrich Kupka and Herbert J. Muthsam},
journal= {arXiv preprint arXiv:1406.1891},
year = {2015}
}
Comments
17 pages, 7 figures, 25 tables, accepted for publication in Computer Physics Communications (CPC)