Results 191 to 200 of about 2,688 (224)

Exponential discretization of the Perfectly Matched Layer (PML) absorbing boundary condition simulation in FD-TD 3D

Optik, 2002
Summary We present the discretized equations of the 12 PML (perfectly matched layer) in the three-dimensional case using the Cartesian geometry. These equations can be used in different fields where Maxwell equations need to be solved.
FRANCISCO Pérez-Ocón
exaly   +2 more sources

A multiaxial perfectly matched layer (M-PML) for the long-time simulation of elastic wave propagation in the second-order equations

Journal of Applied Geophysics, 2014
Abstract In order to conquer the spurious reflections from the truncated edges and maintain the stability in the long-time simulation of elastic wave propagation, several perfectly matched layer (PML) methods have been proposed in the first-order (e.g., velocity–stress equations) and the second-order (e.g., energy equation with displacement unknown ...
Yixian Xu
exaly   +2 more sources

An efficient implementation of Berenger's perfectly matched layer (PML) for finite-difference time-domain mesh truncation

IEEE Microwave and Guided Wave Letters, 1996
An efficient three-dimensional (3-D) implementation of the perfectly matched layer (PML) type of absorbing medium is presented. The technique combines a new eight-unknown time domain formulation in regions in which there is only one nonzero conductivity with the original 12-unknown formulation in the edge and corner regions where nonzero conductivities
R Mittra
exaly   +2 more sources

Mesh truncation in the finite‐element frequency‐domain method with a perfectly matched layer (PML) applied in conjunction with analytic and numerical absorbing boundary conditions

Microwave and Optical Technology Letters, 1995
AbstractThe perfectly matched layer (PML) concept, introduced by Berenger with the aim of synthesizing an absorbing boundary condition (ABC) for the finite‐difference‐time domain (FDTD) method, is modified and extended to finite‐element frequency‐domain (FEFD) applications.
U PEKEL, R Mittra
exaly   +2 more sources

PML (Perfectly Matched Layer) Implementation in the Magic Software

IEEE Conference Record - Abstracts. 2005 IEEE International Conference on Plasma Science, 2005
Summary form only given. The PML (perfectly matched layer) boundary condition of Berenger, is implemented in the MAGIC finite-difference particle-in-cell software, and its behavior is verified and studied. This boundary condition provides a matched electric/magnetic absorber, in a tapered profile, similar to the software's existing "free-space ...
David Smithe, Lars Ludeking
openaire   +1 more source

A robust iterative scheme for FEM applications terminated by the perfectly matched layer (PML) absorbers

Proceedings of the Fifteenth National Radio Science Conference. NRSC '98 (Cat. No.98EX109), 2002
Because of their superior absorption characteristics, the Perfectly Matched Layer (PML) absorbers are used in truncating finite element domains. However, their implementation is equivalent to imposing active elements inside the main mesh. Consequently, the condition number of the resulting systems deteriorates. In this work, an efficient preconditioned
Y.Y. Botros, J.L. Volakis
openaire   +1 more source

The generalized theory of perfectly matched layers (GT-PML): numerical reflection analysis and optimization

IEEE Antennas and Propagation Society International Symposium 1997. Digest, 2002
The use of a perfectly matched layer (PML) has been demonstrated as a highly efficient absorbing boundary condition in FDTD (Berenger 1994). Although the PML is supposed to absorb the outgoing wave totally, its discrete implementation gives rise to numerical reflections.
null Li Zhao, A.C. Cangellaris
openaire   +1 more source

Uniaxial Omega Medium as a Physically Realizable Alternative for the Perfectly Matched Layer (Pml)

Journal of Electromagnetic Waves and Applications, 1998
Summary: Perfectly matched layers suggested for the grid termination in FDTD numerical simulations are active media, thus physically nonrealizable as composite materials with passive inclusions. In this paper we show that spatially dispersive passive media can be in principle used instead of the active PML.
openaire   +2 more sources

The Perfectly Matched Layer (PML) Boundary Condition for the Simulation of Guided-Wave Optical Devices

Integrated Photonics Research, 1996
One of the key issues in implementing a numerical scheme such as the finite-difference method to solve a partial differential equation such as the Helmholtz equation in infinite spatial domain is the numerical boundary condition. Several techniques have been used in the finite-difference beam propagation method.
W. P. Huang, C. L. Xu, W. W. Lui, K. Yokoyama   +3 more
openaire   +1 more source

Non-homogeneous perfectly matched layers (PML) for the analysis of planar radiating structures with TLM method

IEEE Antennas and Propagation Society International Symposium 1997. Digest, 2002
A perfectly matched layer (PML) technique is used to limit the computational domain that includes planar structures and which are analyzed with the transmission-line matrix (TLM) method. The approach uses a coupling algorithm between the TLM symmetrical condensed node (SCN) in the computational domain and a finite-difference time-domain (FDTD ...
N. Pena, M.M. Ney
openaire   +1 more source