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Generalized Combined Field Integral Equations for the iterative solution of the three-dimensional Helmholtz equation

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Academic year: 2021

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Figure 1: Sound-hard sphere: Eigenvalues of the usual (left) and generalized (right) Brakhage- Brakhage-Werner integral operators for a frequency k = 25 and m = 24.
Figure 3: Sound-hard unit sphere: number of matrix-vector products for the four integral formulations with respect to the wave number k (left: n λ = 10 and zero degree incidence) and
Figure 4: Sound-hard ellipsoidal scatterer: number of matrix-vector products for the four inte- inte-gral formulations with respect to the wave number k (left: n λ = 10 and zero degree incidence)
Figure 5: Sound-hard unit cube: number of matrix-vector products for the four integral formu- formu-lations with respect to the wave number k (left: n λ = 10 and incidence (0, 30)) and the density
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