福州大学学报（自然科学版）2024，Vol.52Issue(4)：471-478,8.DOI:10.7631/issn.1000-2243.23249
基于改进QSGS-LBM法的各向异性重构土体的渗流模拟
Numerical simulation of anisotropically reconstructed soil seepage based on improved QSGS-LBM method
摘要
Abstract
In order to solve the defect that the reconstruction model generated by the traditional quartet structure generation set(QSGS)method is inconsistent with the real soil condition,an improved QSGS method is proposed.The anisotropic porous medium model was constructed by considering anisotropy,porosity and soil particle size,and then the validity of the reconstruction model was verified by the two-point autocorrelation function method.Combined with the lattice Boltzmann method,the Matlab automatic program was used to simulate the meso-seepage process.It finds that the maximum difference of the two-point correlation coefficient between the isotropic model and the CT scan slice is more than 2.5 times that of the anisotropic model.The seepage velocity of fluid particles at the middle line of the channel is the largest,and its value can be reach 0.03,while the seepage velocity at the wall of the channel is close to 0.It shows that the anisotropic model is closer to the real soil in pore structure and spatial distribution.Pore preferential flow and finger-in phenomena exists in the later stage of seepage.关键词
细观渗流/水分迁移/重构土体模型/格子玻尔兹曼/四参数随机生长法Key words
meso-seepage/moisture migrati/reconstruction of soil mode/lattice Boltzmann/quartet structure generation set分类
数理科学引用本文复制引用
阙云,邱婷,蔡沛辰,谢秀栋,薛斌..基于改进QSGS-LBM法的各向异性重构土体的渗流模拟[J].福州大学学报（自然科学版）,2024,52(4):471-478,8.基金项目
福建省自然科学基金资助项目(2023J011133) （2023J011133）
