Finite Element Modeling of Anisotropic Half-Space Problems by a Simple Mesh Truncation Scheme

Date

2017-07-14

Author

ÖZGÜN, ÖZLEM
Kuzuoğlu, Mustafa

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

99
views

0
downloads

Anisotropic half-space problems are modeled with finite element method with a simple mesh truncation scheme based on the locally-conformal PML method. The PML is simply implemented by just using complex coordinates inside an anisotropic medium without introducing additional anisotropy and without modifying the finite element formulation. This approach is useful to model electromagnetic radiation and scattering from structures embedded within arbitrary anisotropic media. Simulation results are demonstrated to measure the performance of the model.

Subject Keywords

Finite element method, Locally-conformal PML method, Anisotropic medium, Biaxial, Uniaxial, Electromagnetic scattering, Half-space, Refraction, Buried objects

URI

https://hdl.handle.net/11511/53713

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Recent advances in perfectly matched layers in finite element applications Ozgun, Ozlem; Kuzuoğlu, Mustafa (2008-01-01) We present a comparative evaluation of two novel and practical perfectly matched layer (PML) implementations to the problem of mesh truncation in the finite element method (FEM): locally-conformal PML, and multi-center PML techniques. The most distinguished feature of these methods is the simplicity and flexibility to design conformal PMLs over challenging geometries, especially those with curvature discontinuities, in a straightforward way without using artificial absorbers. These methods are based on spec...
Finite element analysis of electromagnetic scattering problems via iterative leap-field domain decomposition method Ozgun, O.; Kuzuoğlu, Mustafa (2008-01-01) We introduce the Iterative Leap-field Domain Decomposition Method (ILF-DDM), which is based on the dual employment of Finite Element Method and Huygens' Principle iteratively, for the solution of electromagnetic boundary value problems. The method can be applied to cases involving both multiple objects and a single 'challenging' object using the locally-conformal perfectly matched layer technique. We report some numerical results for two-dimensional electromagnetic scattering problems.
Multicenter perfectly matched layer implementation for finite element mesh truncation Ozgun, Ozlem; Kuzuoğlu, Mustafa (Wiley, 2007-04-01) We present the multicenter perfectly matched layer (PML) technique, which is an easy and practical conformal PML implementation, obtained by the complex coordinate stretching, to the problem of mesh truncation in the finite element method. After developing the analytical background of this method. we demonstrate its performance in electromagnetic radiation/scattering problems. (c) 2007 Wiley Periodicals, Inc.
Non-Maxwellian locally-conformal PML absorbers for finite element mesh truncation Ozgun, Ozlem; Kuzuoğlu, Mustafa (Institute of Electrical and Electronics Engineers (IEEE), 2007-03-01) We introduce the locally-conformal perfectly matched layer (PML) approach, which is an easy and straightforward PML implementation, to the problem of mesh truncation in the finite element method (FEM). This method is based on a locally-defined complex coordinate transformation which has no explicit dependence on the differential geometric characteristics of the PML-free space interface. As a result, it is possible to handle challenging PML geometries with interfaces having arbitrary curvature, especially th...
Investigation of nonplanar perfectly matched absorbers for finite-element mesh truncation Kuzuoğlu, Mustafa (1997-03-01) In this paper, we present a detailed theoretical and numerical investigation of the perfectly matched layer (PML) concept as applied to the problem of mesh truncation in the finite-element method (FEM), We show that it is possible to extend the Cartesian PML concepts involving half-spaces to cylindrical and spherical geometries appropriate for closed boundaries in two and three dimensions by defining lossy anisotropic layers in the relevant coordinate systems, By using the method of separation of variables,...

Citation Formats

Ö. ÖZGÜN and M. Kuzuoğlu, “Finite Element Modeling of Anisotropic Half-Space Problems by a Simple Mesh Truncation Scheme,” 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53713.