Innovative absorbing-boundary conditions for the efficient FDTD analysis of lightning-interaction problems

Author

Sarto, Maria Sabrina

Author_Institution

Dept. of Electr. Eng., Rome Univ., Italy

Volume

43

Issue

3

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

368

Lastpage

381

Abstract

Absorbing boundary conditions are developed for the efficient truncation of three-dimensional finite-difference time-domain (3-D FDTD) meshes, used for the analysis of low-frequency transient problems, such as the lightning interaction with an aircraft. The proposed boundary conditions are combined with an innovative time-marching scheme in order to assure numerical stability of the FDTD procedure for millions of time-iterations. The main advantage of the developed approach consists in the great computer saving allowed in the analysis of FDTD problems in which the space discretization step is several thousands of times smaller than the minimum wavelength excited by the transient source. Numerical applications are included in order to demonstrate the accuracy and efficiency of the proposed method

Keywords

aircraft; electromagnetic pulse; electromagnetic wave absorption; finite difference time-domain analysis; iterative methods; lightning; mesh generation; numerical stability; transient analysis; 3-D FDTD meshes; absorbing-boundary conditions; aircraft; efficient FDTD analysis; lightning-interaction problems; low-frequency transient problems; minimum wavelength; numerical stability; space discretization step; three-dimensional finite-difference time-domain meshes; time-iteration; time-marching scheme; transient source; Aircraft; Application software; Boundary conditions; Computational modeling; Finite difference methods; Helium; Lightning; Numerical stability; Time domain analysis; Transient analysis;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.942608

Filename

942608