On the formulation of hybrid finite-element and boundary-integral methods for 3D scattering using multi-level fast multipole algorithm

The renewed interest in the finite-element and boundary-integral (FE-BI) method originated from the development of the fast multipole method (FMM) and the multilevel fast multiple algorithm (MLFMA). To remove the bottleneck for 3D scattering problems, MLFMA is applied to boundary integral equations (BIE). In applying MLFMA to BIE, several problems associated with the efficiency and accuracy of the FE-BI method implemented using the edge-based elements and combined field integral equation (CFIE) are encountered. These problems and the implementation of MLFMA in the FE-BI method are studied.link_to_subscribed_fulltex