《Journal of Geotechnical and Geoenvironmental Engineering》杂志刊登“基于缩尺概念的过滤过程解析解”

作者：Vo Trong Nguyen; Cholachat Rujikiatkamjorn; and Buddhima Indraratna

刊物：《Journal of Geotechnical and Geoenvironmental Engineering》，2013年7月，139卷第7期，1049–1061页

关键词：缩尺；冲蚀；过滤；反滤层

摘要：本文提出了一个适用于基础土壤渗滤系统的过滤过程的解析模型。并采用多孔介质的Navier-Stokes方程获取其水动力特性，据此提出了一种新的算法来求解非线性形式的Navier-Stokes方程。采用功能原理对基础被侵蚀的土颗粒和系统内水流所组成的不同混合物进行计算，功能原理包含了反滤层的压缩尺度。该模型能够通过流量与反滤层中细颗粒的积聚和重分布来估计过滤过程。该模型通过将基础土壤和反滤层区域离散化为离散单元能够预测每一个单元反滤层的颗粒级配随时间的变化情况。最后通过其他室内试验报告及本文的试验证明了该模型与其他可用模型是相关联的。

Analytical Solutions for Filtration Process Based on Constriction Size Concept

Authors: Vo Trong Nguyen; Cholachat Rujikiatkamjorn; and Buddhima Indraratna

Journal: Journal of Geotechnical and Geoenvironmental Engineering, Volume 139, Issue 7(July 2013), 1049–1061

Key words: Constriction size, Erosion, Filtration, Filter

Abstract: An analytical model is proposed to describe the filtration process applicable to a base soil-filter system. The Navier-Stokes equations for porous media are used to capture the hydrodynamic behavior, whereas, numerically, a new algorithm is proposed to solve the Navier-Stokes equation in a nonlinear form. The various mixtures of base soil particles eroded and water flow within the system are computed using the work-energy principle incorporating the constriction size of the filter. The model can assess the filtration process through the flow rate and the accumulation and redistribution of fine particles within the filter. By discrediting the base soil and filter domains into discrete elements, the model can predict the time-dependent particle gradation of the filter for each element. Laboratory tests reported in other studies and those conducted by the authors validate the model in relation to other available models.

原文链接：http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000848