TY - GEN
T1 - Parallel FE-BI-MLFMA for scattering by extremely large targets with cavities
AU - Yang, Ming Lin
AU - Sheng, Xin Qing
PY - 2010
Y1 - 2010
N2 - The finite element-boundary integral-multilevel fast multipole algorithm (FE-BI-MLFMA) has shown to be very general and powerful for 3D scattering. To efficiently model cavity targets, a concave FE-BI-MLFMA is presented in this paper, which can significantly reduce the dispersion error from the FEM and improve the efficiency of FE-BI-MLFMA especially for nonuniform cavities. To eliminate the problem of slow convergence caused by concave surface, an efficient preconditioner based on the sparse approximate inverse (SAI) is constructed in this paper. Numerical experiments demonstrate the accuracy and efficiency of this SAI-preconditioned concave FE-BI-MLFMA for nonuniform deep and large cavites. Furthermore, the FE-BI-MLFMA is parallelized and has successfully compute the scattering from a conducting sphere with 1000 -wavelength diameter using more than 400 million unknowns.
AB - The finite element-boundary integral-multilevel fast multipole algorithm (FE-BI-MLFMA) has shown to be very general and powerful for 3D scattering. To efficiently model cavity targets, a concave FE-BI-MLFMA is presented in this paper, which can significantly reduce the dispersion error from the FEM and improve the efficiency of FE-BI-MLFMA especially for nonuniform cavities. To eliminate the problem of slow convergence caused by concave surface, an efficient preconditioner based on the sparse approximate inverse (SAI) is constructed in this paper. Numerical experiments demonstrate the accuracy and efficiency of this SAI-preconditioned concave FE-BI-MLFMA for nonuniform deep and large cavites. Furthermore, the FE-BI-MLFMA is parallelized and has successfully compute the scattering from a conducting sphere with 1000 -wavelength diameter using more than 400 million unknowns.
UR - https://www.scopus.com/pages/publications/78651330456
U2 - 10.1109/ICEAA.2010.5652281
DO - 10.1109/ICEAA.2010.5652281
M3 - Conference contribution
AN - SCOPUS:78651330456
SN - 9781424473687
T3 - Proceedings - 2010 12th International Conference on Electromagnetics in Advanced Applications, ICEAA'10
SP - 105
EP - 108
BT - Proceedings - 2010 12th International Conference on Electromagnetics in Advanced Applications, ICEAA'10
T2 - 2010 12th International Conference on Electromagnetics in Advanced Applications, ICEAA'10
Y2 - 20 September 2010 through 24 September 2010
ER -