Contrasting Clogging in Granular Media Filters, Soils, and Dead-End Membranes
Contrasting Clogging in Granular Media Filters, Soils, and Dead-End Membranes
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DOI：
10.1061/(asce)ee.1943-7870.0000173
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发表时间：
2010-05
影响因子：
2.2
通讯作者：
D. Mays
中科院分区：
文献类型：
--
作者：
D. Mays
多孔介质中的堵塞是环境工程、水文地质学、土壤学和岩石学中的一个问题。然而，文献的比较揭示了在不同的多孔介质中的不同的堵塞行为：在颗粒介质过滤器中，增加堵塞与较慢的流动，更多的絮凝条件，和较小的分形维数。在土壤和死端膜，增加堵塞与更快的流动，更分散的条件，和更大的分形维数。本文记录了这些差异，讨论了他们在两个关键的中间变量，胶体积累和存款形态，然后提出了一个新的概念模型，解释了报告的堵塞现象作为一个功能的具体存款，分形维数，和一个新的变量，存款位置。测试这个模型是可能的，使用最近推出的实验技术。
Clogging in porous media is a problem in environmental engineering, hydrogeology, soil science, and petrology. However, a comparison of the literature reveals qualitatively different clogging behavior in different porous media: in granular media filters, increasing clogging is associated with slower flow, more flocculated conditions, and smaller fractal dimensions. In soils and dead-end membranes, increasing clogging is associated with faster flow, more dispersed conditions, and larger fractal dimensions. This paper documents these differences, discusses them in light of two key intermediate variables, colloid accumulation and deposit morphology, then presents a new conceptual model that explains the reported clogging phenomena as a function of specific deposit, fractal dimension, and a new variable, deposit location. Testing this model is possible using recently introduced experimental techniques.