Asymmetric perfectly matched layer for the absorption of waves

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The Perfectly Matched Layer (PML) has become a standard for comparison in the techniques that have been developed to close the system of Maxwell equations (more generally wave equations) when simulating an open system. The original Berenger PML formulation relies on a split version of Maxwell equations with numerical electric and magnetic conductivities. They present here an extension of this formulation which introduces counterparts of the electric and magnetic conductivities affecting the term which is spatially differentiated in the equations. they phase velocity along each direction is also multiplied by an additional coefficient. They show that, under certain constraints on ... continued below

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44 pages

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Vay, Jean-Luc February 10, 2002.

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Description

The Perfectly Matched Layer (PML) has become a standard for comparison in the techniques that have been developed to close the system of Maxwell equations (more generally wave equations) when simulating an open system. The original Berenger PML formulation relies on a split version of Maxwell equations with numerical electric and magnetic conductivities. They present here an extension of this formulation which introduces counterparts of the electric and magnetic conductivities affecting the term which is spatially differentiated in the equations. they phase velocity along each direction is also multiplied by an additional coefficient. They show that, under certain constraints on the additional numerical coefficients, this ''medium'' does not generate any reflection at any angle and any frequency and is then a Perfectly Matched Layer. Technically it is a super-set of Berenger's PML to which it reduces for a specific set of parameters and like it, it is anisotropic. However, unlike the PML, it introduces some asymmetry in the absorption rate and is therefore labeled an APML for Asymmetric Perfectly Matched Layer. They present here the numerical considerations that have led them to introduce such a medium as well as its theory. Several finite-different numerical implementations are derived (in one, two and three dimensions) and the performance of the APML is contrasted with that of the PML in one and two dimensions. Using plane wave analysis, they show that the APML implementations lead to higher absorption rates than the considered PML implementations. Although they have considered in this paper the finite-different discretization of Maxwell-like equations only, the APML system of equations may be used with other discretization schemes, such as finite-elements, and may be applied to other equations, for applications beyond electromagnetics.

Physical Description

44 pages

Notes

OSTI as DE00837793

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  • Journal Name: Journal of Computational Physics; Journal Volume: 183; Journal Issue: 2; Other Information: Submitted to Journal of Computational Physics: Volume 183, No.2; Journal Publication Date: 12/10/2002

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  • Report No.: LBNL--49650
  • Report No.: HIFAN 1142
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 837793
  • Archival Resource Key: ark:/67531/metadc788439

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  • February 10, 2002

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • April 4, 2016, 2:52 p.m.

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Vay, Jean-Luc. Asymmetric perfectly matched layer for the absorption of waves, article, February 10, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc788439/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.