Local nonreflecting boundary condition for time-dependent multiple scattering

Starting from from a high-order local nonreflecting boundary condition (NBC) for single scattering [25], we derive a local NBC for time-dependent multiple scattering problems in three space dimensions, which is completely local both in space and time. To do so, we first develop an exterior evaluation formula for a purely outgoing wave field, given its values and those of certain auxiliary functions needed for the local NBC at the artificial boundary. By combining that evaluation formula with the decomposition of the total scattered field into purely outgoing contributions, we obtain a completely local NBC for time-dependent multiple scattering problems. The accuracy and stability of this new local NBC are evaluated by coupling it to a standard finite difference method. (C) 2011 Elsevier Inc. All rights reserved.


Publié dans:
Journal Of Computational Physics, 230, 3135-3154
Année
2011
Mots-clefs:
Laboratoires:




 Notice créée le 2011-12-16, modifiée le 2018-03-17


Évaluer ce document:

Rate this document:
1
2
3
 
(Pas encore évalué)