Sloshing 유동에 기인한 충격하중의 RANS 수치해석

Abstract

The present study aims the application of numerical methods for violent sloshing flows and the comparison of their results. To this ends, two different approaches are implemented to the cases that experimental data are available. The methods to be considered are a finite volume method based on the hybrid VOF scheme and a finite difference method based on the SOLA-SURF algorithm. According to experimental observation, despite the occurrence of overturning, splashes, bubbles, and other complicated physical phenomena, the magnitude of sloshing-induced impact pressure seems to be dictated by the global motion of fluid volume. When this is the case, the simulation of the global flows is a key in the prediction of impact occurrence. The present two different numerical methods are applied to the rectangular tank model with three different liquid filling level conditions (30%, 50%, and 70%) near natural frequencies. The hydrodynamic impact pressures on the side wall and top corner of the tank and violent free-surface flows are compared with the experiment.