摘要
地下水流动的动力学行为对于污染物在地层中的迁移具有重要影响。通过对地下水在岩石孔隙中微观流动行为的研究,探索不同出人口位置及注人速度对地下水流动行为的影响。结果表明:岩石孔隙内地下水流动呈现出非均匀性及复杂性,孔隙的结构特征决定了局部流体的流动特征,盲端附近的孔隙通道流速较小,纵向分布的孔隙通道内流动行为受横向孔隙通道内流速的影响较大;人口流速的增大未对流体流动方向产生较大影响,但会引起岩石孔隙内地下水流动速度增加;出人口位置的变化会对岩石孔隙内地下水流动方向及速度大小产生较大影响。本研究从微观尺度人手,探究了入口速度和出人口位置对地下水在岩石孔隙通道内的流动行为,定量刻画了岩石孔隙中流体流动的时空分布特征。
The dynam ic behavior of groundwater flow has an im portant effect on the transportation of pollutants in the stratum.In this p ap e r,we investigate the influences of inlet position,outlet position,and flow rates on groundwater flow behavior,using the pore-scale num erical sim ulation technology.It is found that the groundwater flow behavior in m icrostructure rock is heterogeneous and complex.The pore structure determ ines the local fluid flow behaviors.The flow velocity of the channels with dead end is relatively low.The velocity in the longitudinal channels is im pacted by the transverse channels significantly.The m agnitude of the inlet velocity has less effect on the fluid flow direction but more on the flow velocity.The inlet and outlet locations have significant effects on the fluid direction and velocity.This work investigates the groundwater flow behavior in pore channels affected by outlet and inlet positions and velocities,and quantitatively describes the flow behaviors in the tim e and location space at the pore scale.
作者
苏军伟
王乐
吕高
刘媛箐
SU Junwei;WANG Le;LU Gao;LIU Yuanjing(School of Human Settlements and Civil Engineering,Xian Jiaotong University,Xian 710049,China;Mechanical Engineering College,Xian Shiyou University,Xian 710065,China)
出处
《水资源与水工程学报》
CSCD
2019年第5期7-13,20,共8页
Journal of Water Resources and Water Engineering
基金
国家科技重大专项(2016ZX05011001)
陕西省自然科学基础研究计划项目(2019JQ-335)
关键词
岩石孔隙
地下水流动
微观数值模拟
微尺度
rock p o re
groundwater flow
microscopic num erical sim ulation
m icro-scale
