Anna-Karin Tornberg creator text xx 2020 monographic ng

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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 https://arxiv.org/pdf/2012.12585v1 Open access — freely available to read. 250101 20260901030407.0