Multiphase modelling of ionic transport in cementitious materials with surface charges
Multiphase modelling of ionic transport in cementitious materials with surface charges
复制标题
具有表面电荷的水泥材料中离子传输的多相建模
DOI：
10.1016/j.commatsci.2015.09.060
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发表时间：
2016
影响因子：
3.3
通讯作者：
Qing-feng Liu
中科院分区：
文献类型：
--
作者：
Gan-lin Feng;Long-yuan Li;Boksun Kim;Qing-feng Liu
本文提出了一个在固液界面带表面电荷的二维两相离子输运模型。应用该模型研究了水泥浆体在外加电场作用下固液界面上的表面电荷对离子迁移的影响。在本模型中的表面电荷被认为是通过修改能斯特-普朗克方程，其中的静电势不仅取决于外部施加的电场，但也对不同的扩散率的不同的离子物种，包括表面电荷。用商业软件COMSOL中建立的有限元方法数值求解了单个离子的耦合输运方程。讨论了表面电荷对离子浓度分布、迁移速度和通量影响的一些重要特征。
This paper presents a two-dimensional, two-phase ionic transport model with a surface charge at solid–liquid interfaces. The present model is applied to investigate the effect of surface charges at the solid–liquid interface on the ionic transport in a cement paste when it is subjected to an externally applied electric field. The surface charge in the present model is considered by modifying the Nernst–Planck equation in which the electrostatic potential is dependent not only on the externally applied electric field but also on the dissimilar diffusivity of different ionic species including the surface charges. The coupled transport equations of individual ionic species are solved numerically using a finite element method built in commercial software COMSOL. Some important features about the effect of surface charge on the concentration distribution, migration speed and flux of individual ionic species are discussed.
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影响因子：
3.3
作者：
Yu Wang;Long-Yuan Li;C. Page
通讯作者：
Yu Wang;Long-Yuan Li;C. Page
DOI：
10.1179/bcj.1996.31.1.73
发表时间：
1996-01
期刊：
British Corrosion Journal
影响因子：
--
作者：
S. Yu;C. Page
通讯作者：
S. Yu;C. Page
影响因子：
2.7
作者：
R. Dhir;Martyn Jones;S. Ng
通讯作者：
R. Dhir;Martyn Jones;S. Ng
影响因子：
3.3
作者：
Long-Yuan Li;C. Page
通讯作者：
Long-Yuan Li;C. Page
影响因子：
7.4
作者：
Yajun Liu;Xianming Shi
通讯作者：
Yajun Liu;Xianming Shi