论文部分内容阅读
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.
The Moving Particle Semi-Implicit (MPS) method is a Lagrangian particle method and has great advantages in dealing with large deformation flow problems. The MPS method is applied to the three-dimensional dam flow problem, , The modified method (XMPS) can make the particles move more orderly and avoid the mutual penetration of the particles.The numerical results show that the MPS method (including XMPS) has a very good performance in dealing with the complicated free surface flow problem Flexibility and reliability, the numerical simulation can predict the shape and position of the free surface more accurately, and the numerical results can still be in good agreement with the experimental results even when the water surface appears curls, water and water column hitting the obstacle. , XMPS gives a sharper, smoother, free-form shape and better captures the details of the flow.