Scalability of an immersed boundary Navier-Stokes solver on Mare Nostrum 5

The project is aimed at testing the scalability on Mare Nostrum 5 GPP of an immersed boundary solver in cylindrical coordinates for the solution of the filtered Navier-Stokes equations. The same solver was already adopted with success for large production runs on several distributed memory clusters. They include also EuroHPC JU facilities, as Leonardo DCGP, for the solution of flow problems of interest in engineering (turbopumps, propellers, axial-flow and cross-flow turbines) in the framework of both Extreme Scale access and Regular access EuroHPC JU calls. Therefore, the present benchmark project is aimed at producing both weak and strong scalability tests on a marine propeller, which was already adopted for the same purpose on Leonardo DCGP. These scalability tests are propaedeutic to the preparation of future Extreme Scale access and Regular access proposals in the fields of marine propulsion and hydrokinetic energy harvesting. The envisioned projects deal with the impact of biofouling on performance, wake properties and the acoustic signature of those devices. In addition, a future subject of interest deals with the impact of the porosity of the blades on the intensity and the instability of the tip vortices shed by both marine propellers and tidal turbines.