Title :
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
fDate :
6/1/2006 12:00:00 AM
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2006.875502
