Show simple item record

dc.contributor.authorMalas, T.en_US
dc.contributor.authorGürel, Leventen_US
dc.date.accessioned2016-02-08T10:11:39Z
dc.date.available2016-02-08T10:11:39Z
dc.date.issued2007en_US
dc.identifier.issn1064-8275
dc.identifier.urihttp://hdl.handle.net/11693/23297
dc.description.abstractIterative solution of large-scale scattering problems in computational electromagnetics with the multilevel fast multipole algorithm (MLFMA) requires strong preconditioners, especially for the electric-field integral equation (EFIE) formulation. Incomplete LU (ILU) preconditioners are widely used and available in several solver packages. However, they lack robustness due to potential instability problems. In this study, we consider various ILU-class preconditioners and investigate the parameters that render them safely applicable to common surface integral formulations without increasing the script O sign(n log n) complexity of MLFMA. We conclude that the no-fill ILU(O) preconditioner is an optimal choice for the combined-field integral equation (CFIE). For EFIE, we establish the need to resort to methods depending on drop tolerance and apply pivoting for problems with high condition estimate. We propose a strategy for the selection of the parameters so that the preconditioner can be used as a black-box method. Robustness and efficiency of the employed preconditioners are demonstrated over several test problems.en_US
dc.language.isoEnglishen_US
dc.source.titleSIAM Journal on Scientific Computingen_US
dc.relation.isversionofhttps://doi.org/10.1137/060659107en_US
dc.subjectIncomplete LU preconditionersen_US
dc.subjectMultilevel fast multipole algorithmen_US
dc.subjectElectromagnetic scatteringen_US
dc.titleIncomplete LU preconditioning with the multilevel fast multipole algorithm for electromagnetic scatteringen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spage1476en_US
dc.citation.epage1494en_US
dc.citation.volumeNumber29en_US
dc.citation.issueNumber4en_US
dc.identifier.doi10.1137/060659107en_US
dc.publisherSociety for Industrial and Applied Mathematicsen_US
dc.contributor.bilkentauthorGürel, Levent
dc.identifier.eissn1095-7197


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record