Welcome to my personal webpage. Here, you will find highlights and information about my research.
About me
I'm originally from the Jutland countryside in Denmark; however, I've been living in Copenhagen since 2016. I appreciate traveling and enjoy spending my spare time cycling around the outskirts of Zealand and wherever I travel.
Research at the moment
Currently, I'm doing my PhD at the Technical University of Denmark (DTU). My project, "New advanced simulation techniques for wave energy converters", is funded by a DTU PhD scholarship at the Department of Applied Mathematics and Computer Science (Compute) and will continue until January 29, 2026. My main interest - at the moment - is related to unfitted/embedded/immersed boundary methods, i.e. simple ways to circumvent cumbersome mesh generation for finite element methods. That is, of course, connected to problems of wave propagation and wave-structure interactions.
Contact information
Emails: jvis@dtu.dk (DTU) and jenshaakon@gmail.com (private). Phone: +45 60 17 05 72.
Links: ResearchGate, DTU Orbit and Google Scholar.
Publication list
Journal papers
- Visbech, J, Engsig-Karup, AP, Ricchiuto, M. A Spectral Element Solution of the Poisson Equation with Shifted Boundary Polynomial Corrections: Influence of the Surrogate to True Boundary Mapping and an Asymptotically Preserving Robin Formulation. J. Sci. Comput. 2025; 102(11). doi.org/10.1007/s10915-024-02713-z.
- Visbech, J, Bingham, HB, Eskilsson, C, Palm, J, Engsig-Karup, AP. A high-order accurate spectral element-based time-domain simulation of a model-scale floating offshore wind turbine. Int. J. Offshore Polar. 2024; 34(3): 254-262. doi.org/10.17736/ijope.2024.sv17.
- Visbech, J, Engsig-Karup, AP, Bingham, HB. Solving the complete pseudo-impulsive radiation and diffraction problem using a spectral element method. Comput. Methods Appl. Mech. Eng. 2024; 423: 116871. doi.org/10.1016/j.cma.2024.116871.
- Visbech, J, Engsig-Karup, AP, Bingham, HB. A spectral element solution of the two-dimensional linearized potential flow radiation problem. Int. J. Numer. Methods Fluids. 2023; 95(3): 453–471. doi:10.1002/fld.5157.
Conference papers
All conference papers have undergone some peer-review process.
- Visbech, J, Engsig-Karup, AP, Bingham, HB, Amini-Afshar, M, Ricchiuto, M. A high-order shifted boundary method for water waves and floating bodies. Proceedings of IWWWFB39. 2024. Available on ResearchGate.
- Visbech, J, Bingham, HB, Eskilsson, C, Palm, J, Engsig-Karup, AP. A high-order spectral element based time-domain simulation of a model-scale floating offshore wind turbine. Proceedings of ISOPE-2023. 2023. Available on ResearchGate.
- Visbech, J, Engsig-Karup, AP, Bingham, HB. Efficient computation of the linear radiation problem using a spectral element method. Proceedings of IWWWFB37. 2022. Available on ResearchGate.
Conference contributions and participations
| Year | Name | Location | Title of talk(s) | Link(s) |
|---|---|---|---|---|
| 2025 | DNV | Kgs. Lyngby, Denmark | (planned) | |
| 2024 | ICCFD12 | Kobe, Japan | An unfitted high-order spectral element method for incompressible Navier-Stokes equations with a free surface: The pressure problem. | Abstract |
| IWWWFB39 | St Andrews, Scotland | A high-order shifted boundary method for water waves and floating bodies. | Proceedings | |
| 2023 | ISOPE2023 | Ottawa, Canada | A high-order spectral element based time-domain simulation of a model-scale floating offshore wind turbine. | Proceedings Abstract |
| CFC2023 | Cannes, France | Solving the linear radiation problem in 3D using the spectral element method. | Abstract | |
| Reduced order modelling for wave-structure modelling. (co-authored) | Abstract | |||
| SIAM CSE23 | Amsterdam, The Netherlands | The shifted boundary method for embedded domain computations using a high-order Spectral Element method for the 2D Poisson problem. | Abstract | |
| 2022 | IWWWFB37 | Giardini Naxos, Italy | Efficient computation of the linear radiation problem using a spectral element method. | Proceedings |
Other
Seminars and talks
- Simulation of water waves and floating bodies on simple high-order unfitted meshes, May 2024, Maynooth, Ireland, chair: John Ringwood.
- A high-order shifted boundary method for water waves and floating bodies, April 2024, Kgs. Lyngby, Denmark, chair: Harry Bingham.
- A high-order accurate shifted boundary method for room acoustics, October 2023, Kgs. Lyngby, Denmark, chair: Cheol-Ho Jeong.
- New advanced simulation techniques for wave energy converters, September 2023, Maynooth, Ireland, chair: John Ringwood.
Lecturing
- DTU course 02689, Advanced numerical methods for differential equations. Lecture on: The shifted boundary method for boundary value problems, November 2023 and October 2024.
- DTU course 02687, Scientific computing for ordinary and partial differential equations. Lecture on: Parabolic partial differential equations, April 2023.
Teaching Assistant
- DTU course 02623, The finite element method for partial differential equations.
- DTU course 02601, Introduction to numerical algorithms.
Research projects
- A new digital twin concept for floating offshore structures. COWIfonden (Grant no. A-165.19).
- Efficient added mass calculations for large and complex floating offshore structures. COWIfonden (Grant no. A-159.15).
- New advanced simulation techniques for wave energy converters. Current PhD project.
Acquired financial support from
- Thomas B. Thriges Fond for ICCFD12 (July 2024).
- Skibsteknisk Selskabs Fond for IWWWFB39 (April 2024) and ICCFD12 (July 2024).
- William Demant Fonden for IWWWFB39 (April 2024).
- Otto Mønsteds Fond for IWWWFB37 (April 2022) and ISOPE2023 (June 2023).