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arXiv · 2210.12542

Integral Equation Methods for the Morse-Ingard Equations

Xiaoyu Wei·Andreas Klöckner·Robert C. Kirby
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Abstract

We present two (a decoupled and a coupled) integral-equation-based methods for the Morse-Ingard equations subject to Neumann boundary conditions on the exterior domain. Both methods are based on second-kind integral equation (SKIE) formulations. The coupled method is well-conditioned and can achieve high accuracy. The decoupled method has lower computational cost and more flexibility in dealing with the boundary layer; however, it is prone to the ill-conditioning of the decoupling transform and cannot achieve as high accuracy as the coupled method. We show numerical examples using a Nystr\"om method based on quadrature-by-expansion (QBX) with fast-multipole acceleration. We demonstrate the accuracy and efficiency of the solvers in both two and three dimensions with complex geometry.

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Xiaoyu Wei, Andreas Klöckner, Robert C. Kirby. 2022-10-22. Integral Equation Methods for the Morse-Ingard Equations. https://arxiv.org/abs/2210.12542

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