溃坝动态拓扑网格求解器研制及应用  

Development and Application of Dynamic Topological Mesh Solver for Dam Failure Process

作　　者：张明亮[1] 宿晓辉[1] 白瑞泽 张建涛[1] 张欢 Zhang Mingliang;Su Xiaohui;Bai Ruize;Zhang Jiantao;Zhang Huan(School of Infrastructure Engineering,Dalian University of Technology,Dalian 116033,China;Beijing Huakecy Engineering Technical Co.,Ltd.,Beijing 100025,China)

机构地区：[1]大连理工大学建设工程学院,大连116033 [2]北京华可实工程技术有限公司,北京100025

出　　处：《水动力学研究与进展(A辑)》2024年第6期861-866,共6页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金重大项目(52192674)。

摘　　要：针对土石坝溃坝过程中溃口形状追踪问题,该文基于开源计算流体动力学OpenFOAM平台二次开发了适用于土石坝溃口非均匀发展的动网格类damBreachingNewLayerTopoFvMesh,实现了溃坝过程中溃口发展的精确模拟。分析模型应用结果发现:采用传统宽顶堰流量公式评价溃口流量会高估溃口实际流量,且无法描述溃口变化引起的水流形态突变现象;溃口表面(包括底面与侧面)剪应力呈现三维空间不均匀分布,且溃口下游出口处较大,易被冲刷侵蚀,因此与实际情况相比,假设溃口表面剪应力均匀分布会存在一定误差。Aiming at the problem of tracking the shape of the dam breach in the breaking process of earth and rock dams,the dynamic mesh class damBreachingNewLayerTopoFvMesh has been developed in this paper,which is suitable for the non-uniform development of the breach of the earth and rock dams,based on the open-source computational fluid software OpenFOAM.And the accurate simulation of the development of the dam breach is realized.The results show that the traditional broad crested weir flow formula overestimates the actual flow rate of the dam breach,and it is difficult to describe the phenomenon of sudden changes in the flow regime caused by the changes in the breach.The surface shear stress of the dam breach(including the bottom and the side surfaces)actually shows three-dimensional spatial inhomogeneous distribution and is larger at the downstream outlet of the dam breach,which is prone to scouring and erosion.Therefore,compared with the actual situation,there are some errors for the assumption of uniform distribution of the surface shear stress of the dam breach.

关 键 词：OPENFOAM 动网格 溃坝 数值模拟 

分 类 号：TU476[建筑科学—结构工程]