文献类型：期刊文献

英文题名：Shale Gas Nanofluid in the Curved Carbon Nanotube: A Molecular Dynamics Simulation Study

作者：Wang, Jiang Li, Zhiling Zhang, Wenli

第一作者：王江

通信作者：Wang, J[1];Zhang, WL[2]

机构：[1]Guizhou Inst Technol, Coll Sci, Guizhou 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Transportat Engn, Guizhou 550025, Peoples R China

第一机构：贵州理工学院理学院

通信机构：corresponding author), Guizhou Inst Technol, Coll Sci, Guizhou 550025, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Transportat Engn, Guizhou 550025, Peoples R China.|贵州理工学院;贵州理工学院理学院;

年份：2024

卷号：9

期号：28

起止页码：30846-30858

外文期刊名：ACS OMEGA

收录：;Scopus(收录号：2-s2.0-85198981761);WOS:【SCI-EXPANDED(收录号:WOS:001265080600001)】；

基金：This material is based upon work supported by Guizhou Provincial Science and Technology Projects (Grant No. Qian Ke He Ji Chu-ZK [2022] Yi Ban 183), and High-Level Talent Startup Fund at Guizhou Institute of Technology.

语种：英文

摘要：Curved nanochannels are prevalent in porous and tortuous materials, with shale matrices being a noteworthy example. The tortuosity of shale matrices significantly influences the behavior of shale gas, holding crucial implications for gas recovery engineering. In this study, we employ molecular dynamics simulation (MD) to investigate the impact of curvature and radius in tortuous nanochannel formed by a curved single-walled carbon nanotube (SWCNT) on the adsorption and transport properties of methane gas fluid. Our findings reveal that the inner half surface of the SWCNT, characterized by negative curvature, exhibits enhanced methane adsorption. Methane in straighter and narrower channels displays higher flow velocities, while wider channels exhibit higher flow flux. The nonzero flow velocity alters adsorption strength, causing the outer half to surpass the inner half. Tangent and vertical velocities of the flow are heterogeneously distributed in the channel, with the outer half having higher tangent velocities. Additionally, a vertical velocity pulse near the entrance induces turbulent vortex flow, slowing down the tangent flow velocity. This research contributes to a deeper understanding of shale gas properties in matrices with bent and curved channels, offering insights into nanofluids in carbon nanotubes and porous media featuring curved nanochannels.