水科学进展2018，Vol.29Issue(1)：89-99,11.DOI:10.14042/j.cnki.32.1309.2018.01.011
对MPS法在溃坝模拟中数值压力振荡问题的改进
Improvements of MPS for reducing numerical pressure oscillation in the dam break simulation
摘要
Abstract
For pursuing an appropriate numerical method for free surface flow with large deformation,a vertical two dimensional corrected MPS numerical model for the simulation of the dam break flow was built based on the Moving Particle Semi-implicit (MPS) method.A new free surface detection method and a highly precise pressure gradient model were proposed to mitigate the issues of particle misrecognition and numerical energy dissipation in the original MPS method.Furthermore,the influence of the source term of pressure Poisson equation on the shocking pressure associated with the dam break flow was discussed by the comparison with the experimental results of Lobovsky et al.,and then a new form of source term was proposed.The calculated results show that the new free surface detection method and the highly precise pressure gradient model have remarkable effects on the decrease of particle misrecognition as well as numerical energy dissipation.Moreover,the comparisons of the numerical pressure calculation and the experimental result reveal the proposed source term of pressure Poisson equation is useful for the reduction of the numerical pressure fluctuation.关键词
MPS粒子法/溃坝/自由表面识别/冲击压/压力震荡Key words
MPS method/dam-break/free surface detection/shocking pressure/pressure oscillation分类
建筑与水利引用本文复制引用
王丽珠,蒋勤,张长宽,Iddy IDDY..对MPS法在溃坝模拟中数值压力振荡问题的改进[J].水科学进展,2018,29(1):89-99,11.基金项目
国家自然科学基金资助项目(51479056) （51479056）
国家重点研发计划资助项目(2017YFC0405403)The study financially supported by the National Natural Science Foundation of China (No.51479056) and the National Key R&D Program of China (No.2017YFC0405403). （2017YFC0405403）
