MPS方法在细长河道中溃坝流动的应用研究  

Study of dam-break flow in slender channel by MPS method

作　　者：饶成平 张友林[1,2] 万德成 

机构地区：[1]上海交通大学,船舶海洋与建筑工程学院,海洋工程国家重点实验室,上海200240 [2]高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《江苏科技大学学报（自然科学版）》2017年第5期650-656,共7页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51379125,51490675,11432009,51579145);长江学者奖励计划基金资助项目(T2014099);上海高校东方学者特聘教授岗位跟踪计划基金资助项目(2013022);上海市优秀学术带头人计划基金资助项目(17XD1402300);上海市船舶工程重点实验室基金资助项目(K2015-11);工信部数值水池创新专项VIV/VIM基金资助项目(2016-23/09)

摘　　要：溃坝问题是我国防灾减灾工作中的一个突出问题.溃坝发生时,会对下游的结构物产生剧烈的砰击作用,并伴随着自由液面的翻卷、破碎等强非线性现象.对这种短时间的自由面强非线性变化,基于网格的计算流体方法往往需要一些特殊的数值处理.文中采用本课题组自主开发的无网格粒子法求解器MLParticle-SJTU对二维带斜坡、三维带90°急弯的溃坝问题进行了模拟.研究了溃坝流的自由面演化,分析了溃坝流遭遇斜坡障碍物的复杂流动现象,并记录下监测点的波高时间历程.通过MPS的数值模拟结果与试验数据进行对比,两者吻合较好.Study on dam-break flow is essential in the work of natural disaster prevention. When dam break happens,it will cause violent impact on the downstream structure. The dam-break flow usually accompanies some nonlinear phenomena,such as broken and merged waves. It requires special treatments for the researcher to simulate those phenomena by the mesh-based methods. In this paper,the 2 D dam-break flow in channel with slope,as well as the 3 D dam-break flow in channel with 90° bend,is investigated by our in-house meshfree solver MLParticle-SJTU based on the modified MPS（ Moving Particle Semi-Implicit） method. Profiles of the surface are presented to study the propagation of dam-break flow. The effects of slope on dam-break flow are also studied by analyzing the flow field near the slope. Besides,the wave elevation at four monitoring sites is recorded through the numerical simulation and then be compared with the experimental results. It turns out that the result of MPS shows a good agreement with the experimental data.

关 键 词：MPS方法 MLParticle-SJTU求解器 无网格方法 溃坝流动 自由面流动 

分 类 号：P753[交通运输工程—港口、海岸及近海工程]