Stability and conditioning of immersed finite element methods: analysis and remedies

F de Prenter, CV Verhoosel, EH van Brummelen… - … Methods in Engineering, 2023 - Springer
This review paper discusses the developments in immersed or unfitted finite element
methods over the past decade. The main focus is the analysis and the treatment of the …

Anisotropic variational mesh adaptation for embedded finite element methods

S Rahmani, J Baiges, J Principe - Computer Methods in Applied Mechanics …, 2025 - Elsevier
Embedded or immersed boundary methods (IBM) are powerful mesh-based techniques that
permit to solve partial differential equations (PDEs) in complex geometries circumventing the …

High order unfitted finite element discretizations for explicit boundary representations

PA Martorell, S Badia - Journal of Computational Physics, 2024 - Elsevier
When modeling scientific and industrial problems, geometries are typically modeled by
explicit boundary representations obtained from computer-aided design software. Unfitted …

[HTML][HTML] Robust numerical integration of embedded solids described in boundary representation

M Meßmer, S Kollmannsberger, R Wüchner… - Computer Methods in …, 2024 - Elsevier
Embedded and immersed methods have become essential tools in computational
mechanics, as they allow discretizing arbitrarily complex geometries without the need for …

Space-time unfitted finite element methods for time-dependent problems on moving domains

S Badia, H Dilip, F Verdugo - Computers & Mathematics with Applications, 2023 - Elsevier
We propose a space-time scheme that combines an unfitted finite element method in space
with a discontinuous Galerkin time discretisation for the accurate numerical approximation of …

A robust cut‐cell finite element method for Poisson's equation in three dimensions

D Li, P Papadopoulos - International Journal for Numerical …, 2024 - Wiley Online Library
This article documents a cut‐cell finite element method for solving Poisson's equation in
smooth three‐dimensional domains using a uniform, Cartesian axis‐aligned grid. Neumann …

[HTML][HTML] Space–time unfitted finite elements on moving explicit geometry representations

S Badia, PA Martorell, F Verdugo - Computer Methods in Applied …, 2024 - Elsevier
This work proposes a novel variational approximation of partial differential equations on
moving geometries determined by explicit boundary representations. The benefits of the …

Conditioning of a hybrid high-order scheme on meshes with small faces

S Badia, J Droniou, L Yemm - Journal of Scientific Computing, 2022 - Springer
We conduct a condition number analysis of a Hybrid High-Order (HHO) scheme for the
Poisson problem. We find the condition number of the statically condensed system to be …

Neural Level Set Topology Optimization Using Unfitted Finite Elements

CN Mallon, AW Thornton, MR Hill, S Badia - arXiv preprint arXiv …, 2023 - arxiv.org
To facilitate widespread adoption of automated engineering design techniques, existing
methods must become more efficient and generalizable. In the field of topology optimization …

Topologically Correct Intersection Curves of Two Trimmed Quadrics with Tolerance Control

W Shao, F Chen - Journal of Systems Science and Complexity, 2024 - Springer
Surface/surface intersection is a fundamental problem in Compute Aided Design and
Geometric Modeling since it is essential to solid modeling, numerically controlled machining …