Solitary Wave Propagation Using a Novel Single Fluid Finite Volume Method for Free Surface Gravity Waves
Accurate prediction of wave loads from extreme waves on individual beams in offshore jacket structures are important to ensure the structural integrity. As the load distribution along a beam is strongly tied to the wave kinematics it is crucial to have an accurate prediction of the surface elevation...
| Published in: | Volume 7: CFD and FSI |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
American Society of Mechanical Engineers
2022
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| Subjects: | |
| Online Access: | https://orbit.dtu.dk/en/publications/7c7c198c-7067-4702-aa7f-8a4d644e2e65 https://doi.org/10.1115/OMAE2022-80255 https://backend.orbit.dtu.dk/ws/files/280177896/OMAE2022_80255_25Feb2022_1328_VER005_FINAL_SUBMISSION.pdf |
| Summary: | Accurate prediction of wave loads from extreme waves on individual beams in offshore jacket structures are important to ensure the structural integrity. As the load distribution along a beam is strongly tied to the wave kinematics it is crucial to have an accurate prediction of the surface elevation and the velocity field. The open-source CFD code OpenFOAM contains two solution algorithms (interFoam and interIsoFoam), which are used for ocean wave simulations and wave load predictions. The algorithms are often applied using a too coarse spatial discretisation, which violates the assumption of a continuous solution at the free surface. The consequence is inaccurate and unphysical predictions even for propagation of a steady wave. Our recently developed Direct Surface Description (DSD) solution algorithm in OpenFOAM is used to simulate a solitary wave with different cell aspect ratios. The solitary wave case shows that the DSD method provides accurate velocity fields and surface elevations both for square and horizontally elongated cells. |
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