Adaptive Mesh Refinement for Characteristic Codes

Details Adaptive Mesh Refinement for Characteristic Codes Adaptive Mesh Refinement for Characteristic Codes

2003-02-03

arxiv.org/abs/gr-qc/0302003v2

J.Comput.Phys. 198 (2004) 10-34

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

36 pages, 17 figures; updated to coincide with journal version

Scientific paper

10.1016/j.jcp.2004.01.001

The use of adaptive mesh refinement (AMR) techniques is crucial for accurate and efficient simulation of higher dimensional spacetimes. In this work we develop an adaptive algorithm tailored to the integration of finite difference discretizations of wave-like equations using characteristic coordinates. We demonstrate the algorithm by constructing a code implementing the Einstein-Klein-Gordon system of equations in spherical symmetry. We discuss how the algorithm can trivially be generalized to higher dimensional systems, and suggest a method that can be used to parallelize a characteristic code.

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