The gauge polyvalence of a new numerical code is tested, both in harmonic-coordinate simulations (gauge-waves testbed) and in singularity-avoiding coordinates (simple Black-Hole simulations, either with or without shift). The code is built upon an adjusted first-order flux-conservative version of the Z4 formalism and a recently proposed family of robust finite-difference high-resolution algorithms. An outstanding result is the long-term evolution (up to 1000M) of a Black-Hole in normal coordinates (zero shift) without excision.
@article{arxiv.0811.1691,
title = {Towards a gauge-polyvalent Numerical Relativity code},
author = {Daniela Alic and Carles Bona and Carles Bona-Casas},
journal= {arXiv preprint arXiv:0811.1691},
year = {2009}
}