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Optimizing the PML in the discrete context
Modave, Axel


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Keywords :
wave propagation; numerical methods; unbounded problem
Abstract :
[en] Perfectly Matched Layers (PML) are widely used for the simulation of unbounded wave-like problems. However their performance depends critically on both an absorption coefficient and the spatial discretization. Tuning the coefficient requires a costly (and case-dependent) optimization procedures... so that in most applications it is set empirically. In this talk we discuss the influence of the absorption coefficient on the PML performance for time-domain simulations, in both continuous and discrete contexts. We present efficient coefficients that allow to avoid any tuning in discrete contexts, and compare those with other frequent choices by means of benchmarks solved with both finite differences and finite elements (continuous and discontinuous). A realistic 3D discontinuous Galerkin benchmark for Maxwell's equations will highlight the advantages of our approach.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Author, co-author :
Modave, Axel  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
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Title :
Optimizing the PML in the discrete context
Publication date :
30 March 2012
Event name :
Journées de Metz 2012 - Recent Advances in Modeling, Analysis and Simulation of Wave Propagation
Event date :
March 29 - March 31, 2012
Audience :
Available on ORBi :
since 19 May 2012


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