Study of the computation parameters influence on the free-surface RANS computations results

摘要

The Reynolds Averaged Navier-Stokes (RANS) equations are very useful in numerical analysis of the ship flow because of the accuracy of evaluating the wave pattern, ability to handle the complexity of the flow in the stern region and reasonable computational effort. However, some experience is necessary to minimize the influence of the mesh and the computational parameters on the results. The present paper shows the results of the computations carried out with the use of relatively coarse mesh (about 500 000 elements) and different values of parameters like time step, number of iterations per time step and under-relaxation factors in order to check their influence on the convergence and the results. The COMET flow solver was used for the computations.