DocumentCode :
845921
Title :
Transmission-line modeling (TLM) based upon unstructured tetrahedral meshes
Author :
Sewell, Phillip ; Benson, Trevor M. ; Christopoulos, Christos ; Thomas, David W P ; Vukovic, Ana ; Wykes, James G.
Author_Institution :
George Green Inst. for Electromagn. Res., Univ. of Nottingham, UK
Volume :
53
Issue :
6
fYear :
2005
fDate :
6/1/2005 12:00:00 AM
Firstpage :
1919
Lastpage :
1928
Abstract :
This paper presents a transmission-line modeling (TLM) algorithm, which is based upon unstructured tetrahedral meshes. In comparison with the conventional, usually Cartesian, scheme, the use of such meshes provides a significant enhancement in the flexibility and accuracy of the TLM simulations, permitting both smooth boundary approximations and the use of diversely sized elements in multiscale problems. A full theoretical development of the unstructured algorithm is presented for the first time and canonical problems are used to demonstrate the computational advantages available. Particular consideration is given to practical meshing constraints and the merging of adjacent tetrahedra into larger cells used to avoid the use of undesirably small time steps.
Keywords :
mesh generation; transmission line theory; boundary approximations; meshing constraints; transmission-line modeling; unstructured tetrahedral meshes; Computational efficiency; Computational modeling; Electromagnetic scattering; Helium; Merging; Noise generators; Noise reduction; Piecewise linear techniques; Time domain analysis; Transmission lines; Simulation; transmission-line modeling (TLM); unstructured meshes;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2005.848078
Filename :
1440697
Link To Document :
بازگشت