Results 231 to 240 of about 10,426 (266)

Perfectly matched layers in static fields

IEEE Transactions on Magnetics, 1998
A perfectly matched layer technique is proposed in the paper for taking unbounded regions in static fields into account by means of the finite element method. The absorbing layer is an anisotropic medium having a nonphysical relative permittivity below one in the direction normal to the boundary with the relative permittivity in the tangential ...
I. Bardi, O. Biro, K. Preis
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Perfectly matched layer based multilayer absorbers

SPIE Proceedings, 2015
Broadband layered absorbers are analysed theoretically and experimentally. A genetic algorithm is used to opti- mize broadband and wide-angle of incidence metal-dielectric layered absorbers. An approximate representation of the perfectly matched layer with a spatially varied absorption strength is discussed.
Tomasz Stefaniuk, Marcin Stolarek, Anna Pastuszczak, Piotr Wróbel, Bartosz Wieciech, Tomasz J. Antosiewicz, Rafał Kotyński   +6 more
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Well-posed Perfectly Matched Layers for Advective Acoustics

Journal of Computational Physics, 1999
Using a mathematical framework originally design for the development of perfectly matched layer (PML) schemes in computational electromagnetics, the authors develop a set of strongly well-posed PML equations for the absorption of acoustic and vorticity waves in two-dimensional convective acoustics under the assumption of a spatially constant mean flow.
Abarbanel, S., Gottlieb, D., Hesthaven, J. S.   +2 more
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Stability Analysis for Perfectly Matched Layered Absorbers

Electromagnetics, 1996
Abstract Stability issues involved with using a time domain formulation of the perfectly matched layer (PML) absorbers are considered. We consider one time domain form of the anisotropic PML and show that it is dynamically unstable. Numerical stability of Berenger's formulation is next considered.
John W. Nehrbass, Jin-Fa Lee, Robert Lee
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Perfectly matched layer absorbing boundary

2016
Because computational storage space is finite, the finite-difference time-domain (FDTD) problem space size is finite and needs to be truncated by special boundary conditions. In the previous chapters we discussed some examples for which the problem space is terminated by perfect electric conductor (PEC) boundaries.
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Curved perfectly matched layer in frequency domain

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2000
Summary: In this paper, the basic principle that a Perfectly Matched Layer (PML) is viewed as a complex change of variables is applied to curvilinear co-ordinates. We give a general model based on tensor analysis, which is able to design any shape of PML. Some applications of the model and results of the numerical analysis are presented.
Fontaine, V., Aubourg, M., Guillon, P.
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Conformal perfectly matched layer

2013
An analytic derivation of the true three-dimensional conformal perfectly matched layer (PML) on a general orthogonal curvilinear coordinate system is presented. The conformal PML can be expressed in terms of an anisotropic constitutive tensor depending on the local principal radii of the curvatures of the termination surfaces.
Teixeira, FL, Chew, WC
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The Perfectly Matched Layer for Computational Acoustics

1995
Recently, Berenger [1] formulated, for the finite difference — time domain solution of Maxwell’s equations in two dimensions, a new absorbing boundary, which he called a perfectly matched layer (PML). His demonstration that the PML possesses extraordinary energy-absorbing properties was verified by Katz, et al. [2], who also extended the formulation to
Quan Qi, Thomas L. Geers
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Stabilized Perfectly Matched Layer for Advective Acoustics

2003
In this paper we present a stabilized Perfectly Matched Layer (PML) for the subsonic aeroacoustics equations. The PML method was introduced by Berenger [2] to compute the solution of Maxwell’s equations in unbounded domain. This method was adapted by Hu [4] to the aeroacoustics equations.
Julien Diaz, Patrick Joly
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Discretization of Continuous Spectra Based on Perfectly Matched Layers

SIAM Journal on Applied Mathematics, 2004
The author gives a detailed analysis of the fact that the condition of perfectly matched layer (PML) changes the character of an open waveguide, whose mathematical description has its spectrum with continuous part into the character of the closed waveguide (bounded in the transversal plane) whose mathematical description has a discrete spectrum.
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