渗流作用下微小颗粒在多孔介质中迁移与沉积规律研究综述  

A review of the migration and deposition of microparticles in porous media under flow

作　　者：张喜伟 孙刚臣[1,2] 任国帅 胡宁 ZHANG Xiwei;SUN Gangchen;REN Guoshuai;HU Ning(Civil and Architectural Engineering College,Guilin University of Technology,Guilinn 541004,Guangxi,China;Guangxi Key Laboratory of New Energy and Building Energy Saving,Guilin 541004,Guangxi,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]广西建筑新能源与节能重点实验室,广西桂林541004

出　　处：《水利水电技术（中英文）》2023年第8期115-124,共10页Water Resources and Hydropower Engineering

基　　金：广西自然科学基金项目(2020GXNSFAA297078);国家自然科学基金项目(41062006);桂林理工大学科研启动基金(GUTQDJJ2003031)。

摘　　要：渗流作用下微小颗粒在多孔介质中的迁移与沉积规律对于解决污染物迁移、地下水回灌、岩土内部侵蚀等问题具有重要意义。【目的】为了了解渗流作用下微小颗粒在饱和多孔介质内的运移与沉积规律,【方法】通过对大量文献的分析,综述了不同粒径颗粒迁移的主要影响因素、颗粒迁移的观测方式、渗流特征对颗粒迁移的影响、受力计算方法的研究成果及现状,指出了目前研究的局限性及未来的研究趋势。【结果】结果表明:在迁移过程中,粒径在0.10~1.00μm的颗粒主要考虑布朗扩散力的影响,粒径在10.00~50.00μm应主要考虑水动力、重力及惯性作用的影响;粒径较大的颗粒受流速的影响更明显,在高离子强度低渗流区更有利于微小悬浮颗粒的吸附;宏观上颗粒迁移与沉积采用对流弥散方程来描述,微观角度上,颗粒是否迁移,由DLVO作用能与重力、惯性、水动力之间的大小关系决定。【结论】但目前理论与实验研究还存在不足,如缺少宏微观相结合的受力分析方法;对于多因素耦合影响下的颗粒迁移特征未能准确描述;颗粒迁移的观测方式与受力分析方法也存在局限性。因此,在今后研究中应尝试宏观观测与微观观测相结合的观测方法,致力于研究多因素影响下的颗粒迁移特征,建立多尺度颗粒受力分析的理论与方法。[Objective]The migration and deposition of tiny particles in porous media under the action of flow is of great significance to solve the problems of pollutant migration,groundwater recharge,soil erosion and so on.In order to understand the migration and deposition of small particles in saturated porous media under the action of flow,[Methods]By analyzing a large body of literature,The main influencing factors of particle migration of different sizes,the observation method of particle migration,the influence of flow characteristics on particle migration,the research result and current situation of force calculation method are reviewed,The limitations of current research and future research trends are pointed out.[Results]The result show that:As the particles migrate,The influence of Brownian diffusivity is mainly considered for particles with particle size of 0.10~1.00μm,The effect of hydrodynamic force,gravity and inertia should be considered when the particle size is 10.00~50.00μm;Larger particles are more affected by flow velocity,In the area of high ionic strength and low percolation,it is more beneficial to the adsorption of small suspended particles;Macroscopic particle migration and deposition are described by convection dispersion equation,From the microscopic point of view,the migration of particles is determined by the size relationship between DLVO action energy and gravity,inertia and hydrodynamic force.[Conclusion]However,there are still deficiencies in theoretical and experimental research,there is a lack of force analysis method combining macro and micro;The characteristics of particle migration under the influence of multi-factor coupling cannot be accurately described;The observation method and force analysis method of particle migration also have limitations.Therefore,in future research,we should try to combine macroscopic observation with microscopic observation,Committed to the study of particle migration characteristics under the influence of multiple factors,Establish the theory and method

关 键 词：渗流 多孔介质 微小悬浮颗粒 颗粒迁移 

分 类 号：TU43[建筑科学—岩土工程]