Curved Mesh Adaptation for High-Order Finite Element Simulations

Aditya Yogesh Joshi; Mark S. Shephard

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arXiv · 2606.10763

Curved Mesh Adaptation for High-Order Finite Element Simulations

Aditya Yogesh Joshi·Mark S. Shephard

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Abstract

The ability to take advantage of computationally efficient high-order finite element methods to perform adaptive finite element analysis of complex engineering problems over general 3D domains requires the ability to adapt meshes with curved elements that maintain the level of geometric approximation of the domain boundary required. This paper presents a conforming curved mesh adaptation procedure aimed at effectively supporting automated adaptive analysis of problems for which the domain geometry is defined in a CAD system. The local mesh modification procedures interact with the CAD geometry to curve the mesh edges and faces representing those boundaries to the order of approximation of the high-order elements being used. The curved mesh edges and faces representing the domain boundaries are based on Bézier approximation geometry, which provides more accurate evaluations of surface-related quantities of interest than the commonly used interpolation methods. To attain computational efficiency during mesh adaptation, the interior mesh entities have their geometric order kept as low as possible while still maintaining control of element shapes. The order of curved mesh entities is limited to no higher than cubic, which allows the definition of an effective procedure to define the shape of the limited number of interior mesh entities that must be curved. The procedures, which are fully parallelized, are demonstrated on the adaptive radio-frequency analysis of a magnetically confined fusion system containing a fully represented radio-frequency antenna.

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Aditya Yogesh Joshi, Mark S. Shephard. 2026-06-09. Curved Mesh Adaptation for High-Order Finite Element Simulations. https://arxiv.org/abs/2606.10763

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