Numerical Prediction of Dynamic Pressure Loads in a Dam Break Case With the Direct Surface Description Method

• Published in: Volume 7: CFD & FSI
• Main Authors: Qwist, Jesper Roland Kjærgaard, Christensen, Erik Damgaard
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Society of Mechanical Engineers 2023
• Subjects: Dam-break; OpenFOAM; DSD-method; Impact loads; Christensen; Arctic
• Online Access: https://orbit.dtu.dk/en/publications/d15ed1c0-7633-4176-be04-1e84e2f6e131; https://doi.org/10.1115/OMAE2023-107186

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. We have recently developed a new method called the Direct Surface Description (DSD) method in OpenFOAM (Qwist & Christensen, 2023)[1]. 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. In this paper our recently developed Direct Surface Description (DSD) solution algorithm in OpenFOAM simulate a dam-break and its interactions with a solid wall. This is a step towards improved predictions of the slamming forces when large waves impacts offshore structures. In addition to the comparison of dynamics pressure loads, the paper aims to address several aspects of the DSD method including mass conservation, current handling of violent flows, effect of adaptive time stepping.