tailieunhanh - Nghiên cứu ảnh hưởng của vết nứt tới độ thấm của vật liệu rỗng bằng phương pháp phần tử hữu hạn

Bài viết sử dụng công cụ phần tử hữu hạn đã được phát triển trong Matlab để tính toán độ thấm của môi trường rỗng có vết nứt thông qua việc giải bài toán Stokes-Darcy. | Transport and Communications Science Journal Vol 71 Issue 9 12 2020 1082-1093 Transport and Communications Science Journal ON THE FACTORS AFFECTING THE PERMEABILITY OF FRACTURED POROUS MEDIA USING FINITE ELEMENT APPROACH Hai Bang Ly1 Phan Viet Hung2 Nguyen Ngoc Long2 1 University of Transport Technology 54 Trieu Khuc Thanh Xuan Hanoi Vietnam 2 University of Transport and Communications No 3 Cau Giay Street Hanoi Vietnam ARTICLE INFO TYPE Research Article Received 25 11 2020 Revised 7 12 2020 Accepted 8 12 2020 Published online 28 12 2020 https Corresponding author Email banglh@ Abstract. In the field of civil engineering or geotechnical engineering flow in fractured porous media has gained increasing attention from scientists. However up to date theoretical and practical basis on this problem still require detailed and in-depth knowledge. One of the approaches to deal with such a difficult problem lies in the coupling of Stokes-Darcy equations. In this study an in-house Matlab numerical tool based on the finite element method was used to estimate the permeability of fractured porous media by solving the Stokes-Darcy coupling problem. The effective mechanical behavior of fractured porous media is often determined by many factors namely the initial porosity distribution and connectivity of the pore network or the shape of fractures. The primary focus of this paper is on the factors affecting the flow characteristics in fractured porous media such as the morphology of fractures and connectivity. The results showed that the above factors are crucial and have a significant effect on the macroscopic permeability of fractured porous media. For interconnected fractures network the permeability was about 1000 times greater than that of the porous medium. Conversely for isolated fractures the macroscopic permeability depended on the shape of fractures lower from 4 to 15 times the permeability of the medium surrounding the fracture. .