基于双向流固耦合模型的溃坝水流数值模拟  

Numerical Simulations of Dam Break Flow Based on Two-way Coupling Model for Fluid-structure Interactions

作　　者：王春正 孙亮[1] 黄玲玲 陈丽芬[2,3] WANG Chun-zheng;SUN Liang;HUANG Ling-ling;CHEN Li-fen(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;Dalian Key Laboratory of Offshore Renewable Energy,Dalian 116024,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,武汉430063 [2]大连理工大学港口海岸及近海工程国家重点实验室,大连116024 [3]大连市海洋可再生能源重点实验室,大连116024

出　　处：《科学技术与工程》2023年第26期11090-11097,共8页Science Technology and Engineering

基　　金：国家自然科学基金(52171275,51961125103,52001053);辽宁省自然科学基金联合基金(2021-KF-16-03)。

摘　　要：弹性结构在运动流体的作用下会产生动力响应,对结构本身的安全性和耐久性都提出了更高的要求。使用开源计算流体力学软件OpenFOAM和开源计算固体力学软件CalculiX建立双向流固耦合模型,对溃坝水流冲击刚性结构和弹性结构的过程进行了数值模拟。首先对比了代数流体体积法和几何流体体积法在分析溃坝水流冲击刚性结构时的精度,结果表明几何流体体积法能够更为准确地模拟剧烈变化的自由液面。进一步采用几何流体体积法对溃坝水流冲击弹性结构的双向耦合问题进行了分析,弹性结构的动力响应和自由液面的分析结果与前人的数值结果吻合良好,表明目前的数值模型可以应用到实际工程的流固耦合分析中。Dynamic responses of elastic structures would be induced under the impact of fast-moving fluid,and higher levels of safety and durability are required for such structures.The processes of fluid impact on rigid and elastic structures in dam break flow have been simulated using an open-source computational fluid dynamic software,OpenFOAM,coupled with an open-source computational solid mechanics software,CalculiX.Firstly,an algebraic volume of fluid(VOF)method and a geometric VOF method have been used for capturing the free surface motion in the case of rigid structure and the numerical results are compared.It is found that better predictions were provided by the geometric VOF method when the free surface experiences sharp and violent changes.Thus,the geometric VOF method was utilized in the two-way coupling simulations of fluid-structure interactions.Numerical results in terms of the dynamic responses of the elastic structure and the water surface profile have been compared with the published data.Good agreements have been achieved,indicating that the present model can be extended to modelling other fluid-structure interactions in practical engineering.

关 键 词：流固耦合 溃坝水流 几何流体体积法 代数流体体积法 

分 类 号：O353.4[理学—流体力学]