三维大幅晃荡的Youngs-VOF法模拟  

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

作　　者：刘永涛[1] 马宁[1,2] 顾解忡[1,2] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《哈尔滨工程大学学报》2012年第9期1075-1078,共4页Journal of Harbin Engineering University

基　　金：财政部;教育部重大专项"船舶数字化智能设计系统"基金资助项目(ZXZY029)

摘　　要：液货船液体舱室在摇荡运动激励下的大幅晃荡问题日趋成为研究热点.针对液箱三维大幅晃荡问题,考虑较低液体装载水平以及外激励频率为共振频率的条件,采用基于有限差分法的Youngs-VOF自由液面重构方法,计入因气体卷入带来的表面张力影响,实现液舱内合并、气体卷入等液面大变形现象的数值模拟,以及抨击压强的时历预报.大幅晃荡的液面大变形现象数值模拟结果与试验结果对比表明,Youngs-VOF能够实现有效模拟界面运动;同时抨击载荷计算结果与试验结果也较为一致;此外就表面张力对抨击压强的影响进行分析,表明有必要计入表面张力因素.The problem of liquid sloshing in tanks of liquid cargo ships has increasingly been attracting the atten- tion 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 load are in good agreement. In addition, that surface tension must be included in phenomena, and calculational and experimental results of the impulsive the analysis of the impact of surface tension on impulsive pressure shows the moment equation when considering impulsive pressure.

关 键 词：流体体积法 三维大幅晃荡 表面张力 

分 类 号：U661.1[交通运输工程—船舶及航道工程]