文献类型：期刊文献

英文题名：The Simulation of Liquid Flow in the Pore Network Model of Nanoporous Media

作者：Guo, Yaohao[1,2];Zhang, Lei[2];Sun, Hai[2];Yang, Yongfei[2];Xu, Zhi[1];Bao, Bo[1];Yao, Jun[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]China Univ Petr East China, Sch Petr Engn, Qingdao 266580, Peoples R China

年份：2021

卷号：143

期号：3

外文期刊名：JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME

收录：;EI(收录号：20210910012827);WOS:【SCI-EXPANDED(收录号:WOS:000616495300022)】；

基金：This work was financially supported by National Natural Science Foundation of China (21808056 and 51504276), PetroChina Innovation Foundation (2019D-5007-0208), Shandong Provincial Natural Science Foundation, China (ZR2016EL09), and Fundamental Research Funds for the Central Universities (No. 18CX02031A).

语种：英文

外文关键词：nanoporous media; pore network model; slip boundary; interface region; petroleum engineering; unconventional petroleum

摘要：The fluid-solid interaction force shows significant influence on liquid flow at nanoscale. Vast experimental observations in recent literatures have shown that Darcy's law cannot be applied to nanoporous media. In this study, the slip length and effective viscosity are adapted to characterize the nanoscale effect. First, the nanoscale effect is investigated in nanotubes through computational fluid dynamic (CFD) modeling analysis. Slip boundary condition has been studied as an important discrepancy between macroscopic flow and nanoscale liquid flow. The effect of viscosity change becomes more notable with the slip length increasing. Then, the flow equation for pore network modeling is developed to capture nanoscale effect. The results show that the apparent permeability of nanoscale systems is significantly underestimated when slip effect is neglected. The size of the pore throat determines whether the slip effect needs to be considered, and critical diameter of neglecting the slip effect for circular throat is 79.17 L-s. It is necessary to take the variation of effective viscosity into account under slip boundary condition. With the pore throat size decreasing, the nanoscale effect increases. The nanoscale effect is more sensitive to pore throat size under hydrophobic conditions than hydrophilic conditions.