Welcome to my personal webpage. Here, you will find highlights and information about my research.
About me
I have been living in Copenhagen since 2016 with my wife and our son (born in 2025). In my spare time, I enjoy spending time with friends and family and going for a bike ride when time permits.
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 December, 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
- Yu, S, ..., Visbech, J, ..., Lara, J. L. Modelling the hydrodynamic response of a floating offshore wind turbine – a comparative study. Appl. Ocean Res. 2025; 155. doi.org/10.1016/j.apor.2025.104441.
- 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.
Relevant preprints
All preprints are submitted for journal publication and/or are currently undergoing review.
- Minniti, S, Visbech, J, Eskilsson, C, Parolini, N, Engsig-Karup, AP. A High-Order Spectral Element Solver for Steady-State Free Surface Flows. Preprint on arXiv (2512.23648). 2025. Available on arXiv.
- Visbech, J, Melander, A, Engsig-Karup, AP. FNPF-SEM: A parallel spectral element model in Firedrake for fully nonlinear water wave simulations. Preprint on arXiv (2506.09435). 2025. Available on arXiv.
Conference papers
All conference papers have undergone some peer-review process.
- Visbech, J, Engsig-Karup, AP, Bingham, HB, Ricchiuto, M. Recent progress on modeling nonlinear wave propagation and wave-structure interaction using a high-order shifted boundary method: Capabilities, challenges, and perspectives. Proceedings of IWWWFB41. 2026. Available on ResearchGate.
- Visbech, J, Melander, A, Engsig-Karup, AP. Modeling Nonlinear and Dispersive Wave Propagation and Wave-structure Interactions in Firedrake. Proceedings of ICSOS2025. 2025. Available soon.
- 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 participations
| Year | Name | Location | Title of talk(s) | Link(s) |
|---|---|---|---|---|
| 2026 | WCCM ECCOMAS 2026 (planned) | Munich, Germany | Using unfitted high-order spectral elements for wave-structure interaction with a polynomial-corrected shifted boundary approach. | Abstract |
| IWWWFB41 | Plitvice, Croatia | Recent progress on modeling nonlinear wave propagation and wave-structure interaction using a high-order shifted boundary method: Capabilities, challenges, and perspectives. | Proceedings | |
| 2025 | ICSOS2025 | Gothenburg, Sweden | Modeling Nonlinear and Dispersive Wave Propagation and Wave-structure Interactions in Firedrake. | Proceedings Abstract |
| DNV | Kgs. Lyngby, Denmark | A Digital Twin Framework for Massively Parallel Simulations of Water Waves interacting with Large-Scale Offshore Structures | Abstract | |
| 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 | |
| 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
- New Water Wave Simulation Methods for a Digital Twin Framework for Offshore Structures, May 2026, Kgs. Lyngby, Denmark, chair: Unknown
- 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
- New advanced simulation techniques for wave energy converters. Current PhD project.
- 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).
Selected supervised student projects (BSc and MSc theses)
- A new steady-state free surface solver for wave-structure interaction applications. MSc Thesis. 2025. Winner of the DANSIS Graduate Award. Student: Simone Minniti.
- Spectral element methods for potential flow around bodies. BSc Thesis. 2025. Students: Magnus Troen and Morten Rønn Østergaard.
- Dimensionality Reduction Techniques for Nonlinear Time-dependent Partial Differential Equations. MSc Thesis. 2025. Student: Laurits Theil Nicolaisen.
Academic achievements and more
- Newman-Evans Fellowship 2026 at IWWWFB41.
- Interview: "Show me your PhD-project" (in danish). Link to ForskerForum.
- Receiver of The Elite Research Travel Grant 2025 from The Ministry for Higher Education and Science.
- Student presentation prize at ICCFD12.
- Second place award in the Tuck Fellowship 2022 at IWWWFB37.
Acquired financial support from
- Thomas B. Thriges Fond: ICCFD12 (July 2024) and INRIA visit 2025 (Fall 2025).
- Skibsteknisk Selskabs Fond: IWWWFB39 (April 2024), ICCFD12 (July 2024), and INRIA visit 2025 (Fall 2025).
- William Demant Fonden: IWWWFB39 (April 2024) and INRIA visit 2025 (Fall 2025).
- Otto Mønsteds Fond: IWWWFB37 (April 2022) and ISOPE2023 (June 2023).
- Familien Hede Nielsens Fond: INRIA visit 2025 (Fall 2025).