Lee, D.; Yoon, J.-S.; Lee, B.W.; Ko, D., and Ha, T., 2023. A coupled numerical solver for modeling free surface water waves over complicated shape of submerged structures. In: Lee, J.L.; Lee, H.; Min, B.I.; Chang, J.-I.; Cho, G.T.; Yoon, J.-S., and Lee, J. (eds.), Multidisciplinary Approaches to Coastal and Marine Management. Journal of Coastal Research, Special Issue No. 116, pp. 106-110. Charlotte (North Carolina), ISSN 0749-0208.
In this study, a new OpenFOAM-based numerical solver was developed by introducing Immersed Boundary Method (IBM) to reproduce complicated shape of submerged structures as well as utilizing wave generation and absorbing boundary conditions. The IBM solver in the foam-extend series model (version 4.0), which is the fork version of OpenFOAM open source library, was coupled with the olaFlow, which is the well-known solver for a simulation of water wave dynamics, to simulate wave transformation over the submerged structures generated by using IBM. The new model reproduced well complicated shape of the submerged structures in the numerical domain and simulated a series of wave generation and transformation over the structures without certain numerical instability. The numerical results were compared with corresponding experimental data for validation and showed qualitatively represented well flow motion around the structures.