MPS方法在三维溃坝问题中的应用  

Application of MPS in 3D dam breaking flows

作　　者：张雨新[1] 万德成[1] 

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

出　　处：《中国科学：物理学、力学、天文学》2011年第2期140-154,共15页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:10672101,50739004,11072154);上海高校特聘教授(东方学者)岗位计划资助项目

摘　　要：MPS(Moving Particle Semi-Implicit)方法是一种拉格朗日粒子法,在处理大变形流动问题中具有很大的优势.将MPS方法应用到三维溃坝流动问题中,并对粒子的移动方式进行了修改,改进后的方法(XMPS)可以使粒子移动更加有序,避免粒子间的相互穿透.数值计算结果表明:MPS方法(包括XMPS)在处理复杂的自由面流动问题中具有很好的灵活性和可靠性,数值模拟能够比较准确地预测出自由面的形状和位置,即使在水面出现翻卷、入水和水柱撞击到障碍物时,数值结果仍然能够与实验相吻合.从细节上看,XMPS可以给出更为清晰、光滑的自由面形状,并能更好地捕捉到流动的细节特征.MPS （Moving Particle Semi-Implicit） is one of Lagrangian particle methods,which has a great advantage in dealing with flow problems with a large deformation of free surface. In this paper,MPS is extended to 3D dam breaking flow problems. The scheme of particle moving is modified,the corrected MPS method （XMPS） can keep particles more orderly,and prevent the penetration of particles each other. Numerical results show that MPS and XMPS have excellent flexibility and reliability in dealing with complicated free surface flows,their numerical simulation can predict the shape and position of free surface very well,even there are turn-up and coalescence of water and impacting on the obstacle. Moreover,the XMPS can give a clearer and smoother shape of free surface and provide more detailed information and features of the complex flows than those obtained by the MPS.

关 键 词：拉格朗日粒子法 MPS 自由面流动 三维溃坝流动 

分 类 号：P753[交通运输工程—港口、海岸及近海工程]