3-D simulation of large amplitude liquid sloshing using Youngs-VOF method

The problem of liquid sloshing in tanks of liquid cargo ships has increasingly been attracting the attention of researchers.For three dimensional large amplitude sloshing,the low filling height and harmonic excitation frequency were taken as the conditions of forming resonance frequency,and a Youngs-VOF method based on finite difference method was adopted to reconstruct a free surface;the effect of surface tension was considered because of air entrapment,and then 3-D violent sloshing phenomena such as merging and air entrapment were numerically simulated.Finally,pressure time histories were predicted.Comparison between numerical and experimental results about the deforming phenomena of liquid surface in the large-amplitude sloshing shows that the Youngs-VOF method can effectively simulate violent sloshing phenomena,and calculational and experimental results of the impulsive load are in good agreement.In addition,the analysis of the impact of surface tension on impulsive pressure shows that surface tension must be included in the moment equation when considering impulsive pressure.