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A new dissipation term for finite-difference simulations in Relativity

Published online by Cambridge University Press:  30 September 2008

D. Alic
Affiliation:
Departament de Fisica, Universitat de les Illes Balears Institute for Applied Computation with Community Code (IAC)
C. Bona
Affiliation:
Departament de Fisica, Universitat de les Illes Balears Institute for Applied Computation with Community Code (IAC)
C. Bona-Casas
Affiliation:
Departament de Fisica, Universitat de les Illes Balears Institute for Applied Computation with Community Code (IAC)
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Abstract

We present a new numerical dissipation algorithm, which can be efficiently used in combination with centered finite-difference methods. We start from a formulation of centered finite-volume methods for Numerical Relativity, in which third-order space accuracy can be obtained by employing just piecewise-linear reconstruction. We obtain a simplified version of the algorithm, which can be viewed as a centered finite-difference method plus some “adaptive dissipation”. The performance of this algorithm is confirmed by numerical results obtained from 3D black hole simulations.

Type
Research Article
Copyright
© EAS, EDP Sciences, 2008

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References

Alcubierre, M., et al., 2004, Class. Quant. Grav., 21, 589613 CrossRef
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Gustafson, B., Kreiss, H.O., & Oliger, J., 1995, Time dependent problems and difference methods (Wiley, New York)