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Summation by parts and dissipation for domains with excised regions

Gioel Calabrese1,2, Luis Lehner1, Oscar Reula3, Olivier Sarbach1 and Manuel Tiglio1,4,5

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We discuss finite difference techniques for hyperbolic equations in non-trivial domains, as those that arise when simulating black-hole spacetimes. In particular, we construct dissipative and difference operators that satisfy the summation by parts property in domains with excised multiple cubic regions. This property can be used to derive semi-discrete energy estimates for the associated initial-boundary value problem which in turn can be used to prove numerical stability.


PACS

02.60.Lj Ordinary and partial differential equations; boundary value problems

04.25.-g Approximation methods; equations of motion

02.70.Bf Finite-difference methods

02.30.Tb Operator theory

MSC

47B39 Difference operators (See also 39A70)

65M06 Finite difference methods

47B44 Accretive operators, dissipative operators, etc.

65M12 Stability and convergence of numerical methods

Subjects

Mathematical physics

Computational physics

Gravitation and cosmology

Dates

Issue 24 (21 December 2004)

Received 29 July 2004, in final form 8 October 2004

Published 22 November 2004



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