An NG-based algorithm for a combined-field integral formulation

Author

Chernokozhin, Evgeny ; Brick, Yaniv ; Boag, Amir

Author_Institution

Sch. of Electr. Eng., Tel Aviv Univ., Tel Aviv, Israel

fYear

2015

fDate

13-17 April 2015

Firstpage

1

Lastpage

2

Abstract

A fast and stable algorithm for solving external problems of scalar scattering is implemented. The method employs a combined-field formulation, which provides stable convergence of the iterative solver, and a multilevel nonuniform grid (NG) based algorithm for the fast evaluation of field integrals to overcome the O(N²) computational complexity of the direct computation. The method is used for calculating the scattered fields by fairly large scatterers, including non convex bodies with piece-wise smooth surfaces.

Keywords

acoustic wave scattering; computational complexity; iterative methods; surface acoustic waves; NG-based algorithm; combined-field formulation; combined-field integral formulation; computational complexity; iterative solver; multilevel nonuniform grid; nonconvex bodies; piecewise smooth surfaces; scalar scattering; scattered fields; Algorithm design and analysis; Convergence; Finite element analysis; Gradient methods; Integral equations; Mathematical model; Scattering; MLNG algorithm; combined-field equation; computational complexity; scalar scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EuCAP), 2015 9th European Conference on

Conference_Location

Lisbon

Type

conf

Filename

7228281