Accurate interfacing of heterogeneous structured FDTD grid components

Author

Donderici, Burkay ; Teixeira, Fernando L.

Author_Institution

Dept. of Electr. & Comput. Eng., Ohio State Univ., OH, USA

Volume

54

Issue

6

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

1826

Lastpage

1835

Abstract

We study strategies to interface finite-difference time-domain (FDTD) update equations in heterogeneous structured grid components for overset composite FDTD grids. An overset composite grid (or "chimera" grid) is a heterogeneous grid formed by the combination of structured FDTD subgrid components chosen to better conform to local geometrical features. We study the performance of various analytical filters and phase matching techniques to reduce problems associated with such heterogeneous grid interfacing, including spatial frequency aliasing and (numerical) phase velocity mismatch. We demonstrate the performance of interfacing algorithms in some canonical examples.

Keywords

computational electromagnetics; finite difference time-domain analysis; FDTD; analytical filter; finite-difference time-domain; heterogeneous structured grid component; interfacing algorithm; phase matching technique; spatial frequency aliasing; Computational fluid dynamics; Equations; Finite difference methods; Finite element methods; Frequency conversion; Matched filters; Performance analysis; Scattering; Shape; Time domain analysis; Chimera grid; finite-difference time-domain (FDTD) methods; interpolation; overset composite grid; subgridding;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2006.875502

Filename

1638379