Title :
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
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;
Conference_Titel :
Antennas and Propagation (EuCAP), 2015 9th European Conference on
Conference_Location :
Lisbon
