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arXiv · 2403.09178

High-order numerical integration on regular embedded surfaces

Gentian Zavalani·Michael Hecht
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Abstract

We present a high-order surface quadrature (HOSQ) for accurately approximating regular surface integrals on closed surfaces. The initial step of our approach rests on exploiting square-squeezing--a homeomorphic bilinear square-simplex transformation, re-parametrizing any surface triangulation to a quadrilateral mesh. For each resulting quadrilateral domain we interpolate the geometry by tensor polynomials in Chebyshev--Lobatto grids. Posterior the tensor-product Clenshaw-Curtis quadrature is applied to compute the resulting integral. We demonstrate efficiency, fast runtime performance, high-order accuracy, and robustness for complex geometries.

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Gentian Zavalani, Michael Hecht. 2024-03-14. High-order numerical integration on regular embedded surfaces. https://arxiv.org/abs/2403.09178

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