Considerations on double exponential-based cubatures for the computation of weakly singular Galerkin inner products
Highly accurate and efficient cubatures based on the double exponential quadrature rules are presented for the computation of weakly singular integrals arising in Galerkin mixed potential integral equation formulations. Due to their unique ability to handle non-smooth kernels, the proposed integration schemes can safely replace (in a "plug-n-play" sense) the traditional Gauss-Legendre rules in the existing singularity cancellation and singularity subtraction methods. Numerical examples using RWG basis functions confirm the excellent performance of the proposed method.
Keywords: Double exponential quadrature ; method of moments (MoM) ; mixed potential integral equation (MPIE) ; RWG basis functions ; weakly singular integrals ; Potential Integrals ; Quadrature-Formulas ; Precision
Record created on 2010-10-26, modified on 2016-08-08