Wave Boundary Layer
Direct numerical or large-eddy simulations (DNS or LES) of oscillatory flow over rippled bottoms are presented. The simulation of such flows with real-scale Reynolds number using DNS or LES approaches requires the use of high performance computing (HPC) due to the high resolution demand. The present work is focused on the development of an MPI+OpenACC CFD code for 3D coastal flows in which periodicity exists in two directions. The scalability of the code has been tested using up to 1280 CPU-cores. The Poisson solver was accelerated up to 60 times when compared with an iterative PCG.