Flux approximation on unfitted meshes and application to multiscale hybrid-mixed methods
Abstract
The flux variable determines the approximation quality of hybridization-based numerical methods. This work proves that approximating flux variables in discontinuous polynomial spaces from the L 2 orthogonal projection is super-convergent on meshes that are not necessarily aligned with jumping coefficient interfaces. The results assume only the local regularity of exact solutions in physical partitions. Based on the proposed flux approximation, we demonstrate that the mixed hybrid multiscale (MHM) finite element method is superconvergent on unfitted meshes, supporting the numerics presented in MHM seminal works.
Fields of Study & Subjects
Advanced Mathematical Modeling in Engineering
Composite Material Mechanics
Advanced Numerical Methods in Computational Mathematics
Publication details
- Journal / source
- Computers & Mathematics with Applications
- Publisher
- Elsevier BV
- Volume
- 209
- Pages
- 16–27
- Publication date
- 13 February 2026
- Language
- EN