Numerical Simulation of Focusing Wave Interaction with Fixed Cylinder Using qaleFOAM

In this paper, the hybrid model, qaleFOAM is used to numerically simulate the interaction between the focusing wave and a seabed mounted cylinder. The qaleFOAM couples the fully nonlinear potential theory (FNPT) based quasi Lagrangian Eulerian Finite Element Method (QALE-FEM) and the two-phase incompressible Navier-Stokes (NS) solver, OpenFOAM/InterDyMFoam, using the domain-decomposition approach. In the qaleFOAM, the computational domain is split into two, i.e. one small domain near the cylinder (NS domain) and the rest (FNPT domain) with a transitional zone between two sub-domains. The wave is generated by a wavemaker in the FNPT domain by using the pre-specified time histories of the paddle motion and propagates into the NS domain through the transitional zone. In the NS domain, the Reynolds Averaged Navier-Stokes (RANS) without turbulent viscosity (laminar model) is employed and the outlet of the NS domain is equipped with an effective passive wave absorber. Two wave conditions considered in this paper are specified by the ISOPE 2020 Comparative Study session. The numerical results are compared with the experimental data and satisfactory results have been achieved.