This wave-structure interaction model replicates the movement of a heaving spar platform (from McCormick's Ocean Engineering Mechanics) under the influence of regular water waves. The repository is meant to be run on OpenFOAM+ v1712. Just hit sh Allrun on your Linux terminal and all required pre-processors together with the two-phase solver should run sequently. The setup itself is quite demanding with a domain discretization of 10 cells per wave height near the free-surface region. Temporal discretization is defined by a Courant number restriction of 1. The total run-time was close to a full-day (24 hours), even though the case was run in parallel between 6 processors. Please feel free to relax the applied discretization if you want some quick results!
Regular waves (2nd order) are created at the boundaries using the Static Boundary Method (SBM). The cylindrical spar is imported into the computational domain using the snappyHexMesh pre-processor. Mesh morphing is used to topologically change the mesh influenced by the spar's movement. The spar's rigid movements are calculated with the help of the sixDoFRigidBodyMotion solver, where the heave Degree of Freedom (DoF) has been activated. The interFoam solver for multiphase and continuous flows is deployed in this model. No turbulance is accounted here (laminar simulation), but adding yours will definetely give you more valid results. I would recommend using the k-epsilon turbulence model.
Accompanying post-processing python scripts are also included to help you calculate and plot the spar's movement and wave elevations at the different locations where the line samples are taken (have a look through the functions sub-dictionary of the controlDict, where the line samples are defined)
Label: Magnitude of Velocity Field (U) at the 180th time step (only alpha.water=0.5 or simply the free-surface is visualized)
Label: Simulated Heaving Motion