Author(s): Santiago Martelo; Aristos Christou; Shunqi Pan; Thorsten Stoesser; Zhihua Xie

Linked Author(s): Aristos Christou, Shunqi Pan, Thorsten Stoesser

Keywords: Coastal Defences; Fluid-Structure Interaction

Abstract: A numerical study of the interaction of the current coastal defenses in Torquay (UK) is shown in this paper. Three-dimensional numerical simulations were carried out to assess the performance of coastal defenses and prevent excessive wave over-topping due to extreme weather events. The objective is to deliver the means to provide fast and reliable predictions when planning and designing coastal defenses by civil-engineering institutions and real-estate developers to prevent coastal flooding and subsequent disruption. The computational fluid dynamic code Hydro3D is employed in this study, which has been validated and applied to many hydraulic engineering and marine renewable energy problems. Further refinements for the fluid-structure interaction (FSI) and free surface model are reported here. In this code the Eulerian fluid flow is solved through finite difference method with staggered arrangement of the velocity components on a Cartesian grid. The solution of a Poisson pressure-correction equation is achieved using the multi-grid technique in the final step as a corrector of the predicted velocities. In addition, this code was further enhanced with a local mesh refinement approach and a FSI model based on the Immersed Boundary Method (IBM). The evolution of the free surface is taken into account with the implementation of the Level Set Method (LSM). Both the current IBM and a new FSI approach inspired on the Ghost Cell Method (GCM) have been tested using dam-break benchmark with an obstacle.

DOI: https://doi.org/10.3850/IAHR-39WC252171192022323

Year: 2022