Chapter 27 - Calculation of the flow around ship hulls using a parallel CFD code

Abstract

This chapter discusses calculation of the flow around ship hulls using a parallel computational fluid dynamics (CFD) code. A free surface is used for simulating the flow around ship hulls. The working environment with the specific compilation options is used to assess their efficiency. Several configurations of the 4-nodes cluster are compared in terms of speed. The free surface incompressible turbulent flow around the hull is investigated by the numerical solution of the unsteady Navier–Stokes equations for slightly compressible flows, and the results are compared with different numerical and experimental results. The “beam” and “warming” implicit factorized scheme is used to solve the governing equations. Large eddy simulation is used together with the Smagorinsky subgrid scale model to simulate the turbulent flow. The free surface is treated through the re-meshing technique, using an algebraic routine for accompanying the displacements. The complexity and high sensitivity of such a physical flow phenomenon require an accurate and robust numerical model. The proposed numerical solution is able to provide a good picture of the real physics of the turbulent flow. The numerical results compare fairly well with experimental results from various sources.