摘要
研究多孔介质中悬浮颗粒的迁移–沉积特性对地下水回灌、石油开采、污染物迁移等问题具有重要意义。从数学模型和物理试验2个方面介绍和总结多孔介质中悬浮颗粒迁移–沉积特性研究现状。提出以现场监测及大量室内试验为手段,以不同条件下悬浮颗粒迁移–沉积特性研究为基础,以建立考虑颗粒速度修正系数、孔隙率修正系数、颗粒捕获率及孔隙率变化的颗粒迁移数学模型为前提的颗粒迁移–沉积特性研究方法。当前无论是物理试验还是数学模型研究,均存在很多不足:如未能准确描述多孔介质内部孔隙结构,没有考虑到颗粒在多因素耦合作用下的迁移–沉积特性,未能将宏观尺度下的过滤现象与细观尺度下的颗粒运动很好地结合等。因此认为以下4个方向是今后研究的重点和趋势:(1)开发动态三维试验装置;(2)建立完善的多孔介质空间模型;(3)建立多因素耦合影响下的颗粒迁移–沉积数学模型;(4)建立多孔介质多尺度颗粒分析方法与理论。
The study of the transportation and deposition characteristics of suspended particles in porous media is of great significance to engineering problems such as oil exploration, groundwater recharge and pollutant transportation. The advances in this area are presented in this paper with particular reference to mathematical models and experimental studies. A new transportation and deposition model was proposed based on data from field monitoring and a large number of laboratory tests. The transportation and deposition characteristics of suspended particles were studied under different conditions. The new mathematical model taking into account the velocity correction parameter, the porosity correction parameter, the particle capture efficiency and the variation of porosity was then established. Deficiencies of current experimental studies and mathematical models include the failure to accurately describe the pore structure of porous media, the neglecting of multi-factor coupling effects on the transportation and deposition characteristics, and the failure to properly integrate the macro-scale filtration phenomenon and the meso-scale particle motion. Future studies are expected to follow these four major directions: (1) Development of a dynamic three-dimensional experimental facility;(2) Establishment of a more accurate spatial model for porous media;(3) Development of mathematical models for particle transportation and deposition under the coupling effects of multiple factors;(4) Development of the theory and analytical methods for particle transportation and deposition across micro-meso-macro scales. © 2015, Science Press. All right reserved.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2015年第12期2410-2427,共18页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(41272272)
湖北省自然科学基金资助项目(132002)
中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室基金项目(SKLQ009)~~
关键词
渗流力学
多孔介质
悬浮颗粒
迁移–沉积
脱离
孔隙结构
Deposition
Groundwater
Groundwater pollution
Pore structure
Porosity
Porous materials
Transportation
