Page 73 - 2017地大报告电子书

环境学院发展报告

WATER RESOURCES RESEARCH 卷 : 53 期 : 1 页 : 127-141 出版年 : JAN 2017

摘 要 :Horizontal drilling has become an appealing technology for water resource
exploration or aquifer remediation in recent decades, due to decreasing operational cost and many

technical advantages over vertical wells. However, many previous studies on flow into horizontal
wells were based on the Uniform Flux Boundary Condition (UFBC), which does not reflect the

physical processes of flow inside the well accurately. In this study, we investigated transient flow
into a horizontal well in an anisotropic confined aquifer laterally bounded by two constant‐

head boundaries. Three types of boundary conditions were employed to treat the horizontal well,
including UFBC, Uniform‐Head Boundary Condition (UHBC), and Mixed‐Type Boundary

Condition (MTBC). The MTBC model considered both kinematic and frictional effects inside
the horizontal well, in which the kinematic effect referred to the accelerational and fluid‐inflow

effects. A new solution of UFBC was derived by superimposing the point sink/source solutions
along the axis of a horizontal well with a uniform flux distribution. New solutions of UHBC and

MTBC were obtained by a hybrid analytical‐numerical method, and an iterative method was
proposed to determine the well discretization required for achieving sufficiently accurate results.

This study showed that the differences
among the UFBC, UHBC, and MTBC

solutions were obvious near the well
screen, decreased with distance from

the well, and became negligible near
the constant‐head boundary. The

relationship between the flow rate and
the drawdown was nonlinear for the

MTBC solution, while it was linear for
the UFBC and UHBC solutions

论文链接：https://doi.org/10.1002/2015WR018252

4.Effects of particle diameter on flow characteristics in sand columns
作 者 : Li Zhongxia; Wan Junwei; Huang Kun*;WeiChang;YouHe.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 卷 : 104 页 :

533-536 出版年 : JAN 2017

摘 要 ：This work aims to investigate the effects of particle size on flow regimes and
validation of Darcy law. Experiments were conducted in sand columns with five different particle

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