Results 171 to 180 of about 144,214 (212)

Perfectly matched layers and transformation optics

2009 IEEE Antennas and Propagation Society International Symposium, 2009
The perfectly matched layer (PML) is a very versatile and effective absorbing boundary condition. The PML was first introduced by Berenger [1] for the finite-difference time-domain (FDTD) method. The general purpose of the PML is to produce reflectionless absorption of waves in the continuum limit.
Teixeira, FL, Chew, WC
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Using perfectly matched layers for elastodynamics

IEEE Antennas and Propagation Society International Symposium. 1996 Digest, 2002
The simulation of elastic waves in inhomogeneous media is important in many applications such as seismic survey, acoustic well logging, and other nondestructive evaluation applications. The perfectly matched layers (PML) has been introduced by Berenger (see Computational Physics, vol.114, p.185-200, 1994) as a material absorbing boundary condition (ABC)
Liu, QH, Chew, WC
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Perfectly matched layer in cylindrical coordinates

IEEE Antennas and Propagation Society International Symposium 1997. Digest, 2002
A cylindrical perfectly matched layer is developed based on the complex coordinate system approach. By an analytic continuation of the radial coordinate to complex values, the fields can be attenuated in the radial direction with no reflection (in the continuum space) for all angles of incidence and all frequencies.
Teixeira, FL, Chew, WC
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Ellipsoidal perfectly matched layers for acoustics

Journal of the Acoustical Society of America, 2016
In this talk, we present a novel ellipsoidal formulation and massively parallel implementation of a perfectly matched layer (PML) for acoustics and structural acoustics. Perfectly matched layers and infinite elements are commonly used for finite element simulations of acoustic waves on unbounded domains.
Greg Bunting, Arun Prakash, Clark Dohrmann, Timothy F. Walsh   +3 more
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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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Guided elastic waves and perfectly matched layers

Wave Motion, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Skelton, Elizabeth A., Adams, Samuel D. M., Craster, Richard V.   +2 more
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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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