DIRECTFN

Fully numerical evaluation of 4-D singular integrals arising from Galerkin SIE formulations

Athanasios Polimeridis, Alexandra Tambova, Mikhail Litsarev
Dec 24, 2019

DIRECTFN package is free software for the accurate and efficient evaluation of 4-D singular integrals arising from Galerkin MoM surface integral equation formulations over conforming triangular or quadrilateral meshes. The fully-numerical algorithms of DIRECTFN are suitable for the following applications:

  • Weakly and strongly singular kernels
  • Planar and curvilinear elements
  • Basis/testing functions of arbitrary order
  • Problem-specific Green's functions (e.g. expressed in spectral integral form)
  • From zero frequency to frequencies beyond microwaves
  • Spectral convergence to machine precision

Source code

EM

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