Title :
Implementing a boundary condition for incident waves in FE calculations
Author :
Xu, Xiaoming ; Zhou, Hai ; Emson, C.R.I. ; Trowbridge, C.W.
Author_Institution :
Sch. of Electr. Eng., South Bank Univ., London, UK
fDate :
5/1/1996 12:00:00 AM
Abstract :
An boundary condition for three dimensional scattering and diffraction problems is presented. On the exterior boundary, where a finite element mesh has to be truncated, a surface integral is introduced to incorporate the incident wave into the finite element scheme, while an absorbing boundary condition is applied to absorb the outgoing scattered wave. The boundary condition can be easily included in the finite element formulation, but some pitfalls are highlighted. Three dimensional numerical examples show the accuracy of the method
Keywords :
boundary-value problems; electromagnetic wave absorption; electromagnetic wave diffraction; electromagnetic wave scattering; finite element analysis; integral equations; 3D diffraction problems; 3D numerical examples; 3D scattering problems; FE calculations; absorbing boundary condition; accuracy; boundary condition; exterior boundary; finite element mesh truncation; incident wave; incident waves; outgoing scattered wave; surface integral; three dimensional scattering problems; Acoustic scattering; Boundary conditions; Diffraction; Electromagnetic scattering; Finite element methods; Geometry; Integral equations; Iron; Magnetic materials; Scattering; Surface waves;
Journal_Title :
Magnetics, IEEE Transactions on
