东南大学学报（自然科学版）2026，Vol.56Issue(8)：1137-1146,10.DOI:10.3969/j.issn.1001-0505.2026.08.005
非凸颗粒离散元模型的多孔介质渗透性能研究
Research on permeability of porous media via discrete element modeling of non-convex particles
摘要
Abstract
Porous media of random packings of non-convex particles are ubiquitous in energy,geotechnics and civil engineering,of which the internal pore structure critically influences fluid transport properties.To ad-dress the limitations of traditional methods in predicting permeability performance,this study proposes an inte-grated analysis framework linking grain-scale parameters to macroscopic permeability.First,3D non-convex particle models are generated via a parametric contraction-deformation method.Next,high-density non-convex random packings are efficiently simulated using a GPU-accelerated discrete element method coupled with level-set contact detection algorithm.Finally,the voxelized pore model is solved based on the Navier-Stokes equations to reveal the influence mechanism of particle morphology on absolute permeability.Results show that higher particle non-convexity and surface complexity significantly degrade pore connectivity and permeability.Packings of quasi-spherical particles with uniformly distributed contraction centers exhibit better permeability than those with randomly distributed ones.Additionally,a moderately broad particle size distribution enhances pore network transport.This work provides robust theoretical basis and numerical tools for the performance optimization of irregular-particle porous media.关键词
非凸颗粒/随机堆积/绝对渗透率/离散元方法/多孔介质Key words
non-convex particles/random packing/absolute permeability/discrete element method/porous media分类
数理科学引用本文复制引用
许文祥,代定成,贾明坤,许诺,王金权..非凸颗粒离散元模型的多孔介质渗透性能研究[J].东南大学学报（自然科学版）,2026,56(8):1137-1146,10.基金项目
国家自然科学基金区域联合基金重点资助项目(U24A20168) （U24A20168）
国家自然科学基金原创探索资助项目(52350004) （52350004）
国家自然科学基金面上资助项目(12172122). （12172122）
