Session: 06-03-04 Fluid-Structure, Multi-body and Wave-body Interaction
Submission Number: 157440
Numerical Prediction of Wave-Runup on a Monopile With the Direct Surface Description Method
The safety of an offshore structure relies on the structural load capacity being higher than the experienced loads. We are specifically interested in estimating the wave loads on offshore structures with the Computational Fluid Dynamics (CFD) code OpenFOAM. We have recently developed a new method called the Direct Surface Description (DSD) method in OpenFOAM (Qwist & Christensen, 2022) and (Qwist & Christensen, 2023). Here it was shown that the DSD method is superior compared to the existing official release OpenFOAM solver with respect to prediction of wave kinematics and surface elevation. Furthermore, a solution was provided for a long-standing issue with spurious velocities near the free surface in the OpenFOAM official release solvers.
In this work our aim is to study the wave runup on a monopile and eventually calculate the forces on service platforms typically attached to the substructures of offshore wind turbines. The analyses include periodic as well as irregular waves.
References:
Qwist, J. R. K., & Christensen, E. D. (2022). Solitary wave propagation using a novel single fluid finite volume method for free surface gravity waves. Proceedings of the ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. Hamburg.
Qwist, J. R. K., & Christensen, E. D. (2023). Development and implementation of a Direct Surface Description method for free surface flows in OpenFOAM. Coastal Engineering, 179(October 2022), 104227. https://doi.org/10.1016/j.coastaleng.2022.104227
Presenting Author: Erik Damgaard Christensen Technical University of Denmark
Presenting Author Biography: The focus of Prof. Christensen’s research is breaking waves, flow around offshore and coastal structures, sediment transport, shoreline development, analyses of moored ships in harbours and in the open sea, and wave loads on large structures. Development of advanced Computational Fluid Dynamics for breaking waves on beaches and wave-current interaction with porous structures. Prof Christensen has 14 years’ experience from industry on coastal and marine eng. Lately, focus on new ideas for functionality of coastal protection schemes and structures with multipurpose use. Prof. Christensen was until summer 2024 Research Manager for DEWIOS part of CTR3 – Extend Life of Potential Hub Structures, DHRTC and from 2012 to 2016 coordinator of the 7th frame prog. project MERMAID with 29 partners.
Numerical Prediction of Wave-Runup on a Monopile With the Direct Surface Description Method
Submission Type
Technical Paper Publication