水力发电2025，Vol.51Issue(12)：39-44,107,7.
基于CFD-DEM模拟的静摩擦系数对土体颗粒渗流-侵蚀过程的影响研究
Effect of Static Friction Coefficient between Soil Particles on Seepage-Erosion Process of Soil Particles Based on CFD-DEM Simulation
摘要
Abstract
A thorough understanding of the seepage-erosion mechanism of soil particles is crucial for evaluating the stability of dams built on deep overburden layers.Therefore,it is highly significant to investigate how the static friction coefficient between soil particles affects the process of seepage-erosion.The MATLAB is used to simulate the pore space of coarse-grained soil,and combined with CFD-DEM fluid-solid coupling numerical modeling,the coupled motion of the soil particles and the flow field during fine-grained erosion is simulated.The study reveals the influence of the hydraulic gradient and static friction coefficient on the seepage-erosion process,the amount of particle erosion,the force chain structure,and the macro-hydraulic parameters within the quasi-3D pore structure.The results demonstrate that:(a)the erosion resistance of soil body decreases nonlinearly with the increase of static friction coefficient;and(b)under a high hydraulic gradient,the force chain structure of clogged region stabilizes,the particle resistance increases,the average flow velocity decreases,the proportion of erosion mass decreases,and the traces of flow field change from straight to dispersed.关键词
深厚覆盖层/土体结构/静摩擦系数/流固耦合/渗流-侵蚀/水力梯度/CFD-DEMKey words
deep overburden layer/soil structure/static friction coefficient/fluid-solid coupling/seepage-erosion/hydraulic gradient/CFD-DEM分类
建筑与水利引用本文复制引用
朱林松,孙学武,王俊杰,王子龙,高攀蕊,王婷..基于CFD-DEM模拟的静摩擦系数对土体颗粒渗流-侵蚀过程的影响研究[J].水力发电,2025,51(12):39-44,107,7.基金项目
国家自然科学基金黄河水科学研究联合基金项目(U2443230) （U2443230）
