Astrophysical Validation
Abstract
We present examples of validating components of an astrophysical simulation code. Problems of stellar astrophysics are multi-dimensional and involve physics acting on large ranges of length and time scales that are impossible to include in macroscopic models on present computational resources. Simulating these events thus necessitates the development of sub-grid-scale models and the capability to post-process simulations with higher-fidelitymethods.We present an overview of the problem of validating astrophysical models and simulations illustrated with two examples. First, we present a study aimed at validating hydrodynamicswith high energy density laboratory experiments probing shocks and fluid instabilities. Second, we present an effort at validating code modules for use in both macroscopic simulations of astrophysical events and for post processing Lagrangian tracer particles to calculate detailed abundances from thermonuclear reactions occurring during an event.
Cite
@article{arxiv.1809.02180,
title = {Astrophysical Validation},
author = {A. C. Calder and D. M. Townsley},
journal= {arXiv preprint arXiv:1809.02180},
year = {2018}
}
Comments
29 pages, 6 figures, To appear in Computer Simulation Validation. Fundamental Concepts, Methodological Frameworks, Philosophical Perspectives. Claus Beisbart and Nicole J. Saam. Eds. (forthcoming). Cham: Springer International Publishing