arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2111.13151math.NAcs.NA
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计算曲线边界单元上的弱奇异和近奇异积分

Computing weakly singular and near-singular integrals over curved boundary elements

Hadrien Montanelli, Matthieu Aussal, Houssem Haddar

摘要:

本文提出了计算弱奇异积分和近奇异积分的算法,这些积分是在用曲线边界单元求解三维Helmholtz方程时产生的。这些是基于使用牛顿法,奇异减法,连续的方法,和移植高斯求积的参考元素的空间中的奇异性的原像的计算。我们证明了我们的方法的二次基函数和二次三角形与几个数值实验,包括两个半球的散射的准确性。

英文摘要:

We present algorithms for computing weakly singular and near-singular integrals arising when solving the 3D Helmholtz equation with curved boundary elements. These are based on the computation of the preimage of the singularity in the reference element's space using Newton's method, singularity subtraction, the continuation approach, and transplanted Gauss quadrature. We demonstrate the accuracy of our method for quadratic basis functions and quadratic triangles with several numerical experiments, including the scattering by two half-spheres.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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