Open this publication in new window or tab >>2025 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]
Hermite finite element methods, or Hermite FEM, use a set of basis functions that parameterise derivative values as well as function values at various points over a computational domain. This allows the use of function spaces that are continuous in derivatives as well as value over the computational domain. Doing this is shown to have computational benefits, such as allowing a larger stable time-step in time-dependent problems, and solving equations with higher spatial derivatives. This is particularly useful for modifying equations with higher derivative terms to increase the order of accuracy of a time-stepping scheme.
A limitation of these methods is that basis functions corresponding to derivatives in 2D or higher are more dependent on the shape of grid elements than basis functions corresponding to value. By using cut finite element methods (cutFEM), problems can be solved on domains without the exact shape of the domain being represented in the grid. This allows the benefits of Hermite FEM to be gained, without placing restrictions on the computational domain or deriving a new basis for every grid.
Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2025. p. 41
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 2579
Keywords
finite element method, Hermite interpolation, numerical analysis, wave equation, cutFEM, modified equation
National Category
Computational Mathematics
Research subject
Mathematics
Identifiers
urn:nbn:se:uu:diva-565886 (URN)978-91-513-2572-9 (ISBN)
Public defence
2025-10-24, Ångström house 10, room 101195 (Heinz-Otto Kreiss), Uppsala, 10:00 (English)
Opponent
Supervisors
Funder
Swedish Research Council, 2018- 05279
2025-10-022025-08-272025-10-02