High Performance Computing in Naval Hydrodynamics (HPCNH)

This project aims at testing the scalability performance of an in-house Fortran code with MPI parallelization for simulations in naval hydrodynamics using the Large-Eddy Simulation methodology, coupled with an Immersed-Boundary technique. The code solves the filtered Navier-Stokes equations for incompressible flows, discretized via a numerical methodology achieving optimal conservation properties, well suited for the accurate simulation of turbulent flows. Scalability tests will be performed on a test case relevant to naval hydrodynamic applications, dealing with the DARPA suboff body, which is a notional submarine geometry developed for fundamental studies on underwater vehicles. An Immersed-Boundary methodology will be adopted for handling the body immersed within a cylindrical grid. The same solver was already successfully tested on several parallel clusters and this project is aimed at verifying its performance on Irene SKL and Irene ROME. The results of such tests will be utilized as guidance for selecting the most suitable machine for the adopted solver during the preparation of the proposal for the coming 21st PRACE Call for Project Access, where the same solver is going to be utilized for the simulation of turbulent flow problems in the field of naval hydrodynamics. Those tests will serve as evidence of scalability of the code, demonstrated in the past in HPC environment on different architectures, including resources provided in the framework of past PRACE Calls, as Marconi KNL and Irene KNL.