01330nam a2200169 a 4500 20260901030407.0 250101s2020 xx o 000 0 eng d Anna-Karin Tornberg Accurate evaluation of integrals in slender-body formulations for fibers in viscous flow arXiv 2020 text online resource A non-local slender body approximation for slender flexible fibers in Stokes flow can be derived, yielding an integral equation along the center lines of the fibers that involves a slenderness parameter. The formulation contains a so-called finite part singular integral, and can in the case of several fibers or evaluation of the flow field require the evaluation of nearly singular integrals. We introduce a numerical technique to accurately and efficiently evaluate the finite part integral. This technique can be applied combined with any panel based quadrature rule and will add no additional cost except for a small precomputation of modified quadrature weights. We also show how a related technique that was recently introduced can be applied for the evaluation of the nearly singular integrals. Open access — freely available to read. https://arxiv.org/pdf/2012.12585v1 Read the full paper (PDF) ERES 702 702 0 0 0 3 GEN MAIN MAIN SCICOMP 2026-09-01 0 YGE000963 2026-09-01 03:04:07 https://arxiv.org/pdf/2012.12585v1 2026-09-01 PAPER