图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
多孔介质期刊
影响因子: 1.061 5年影响因子: 1.151 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v9.i7.30
pages 637-650

Migration versus Diffusion through Porous Media: Time-Dependent Scale Analysis

P. Begue
Laboratory of Materials and Durability of Constructions, INSA-UPS, Department of Civil Engineering, National Institute of Applied Sciences, 135 Avenue de Rangueil, 31077 Toulouse, France
Sylvie Lorente
Université de Toulouse; INSA; 135, avenue de Rangueil, F-31 077 Toulouse Cedex 04, France

ABSTRACT

This paper presents a fundamental study of enhanced ionic transport in the case when an electrical field is applied through a saturated porous medium. The study focuses on the very first moments when the potential difference is applied. Scale analysis is used in order to highlight the existence of two different regimes: initially, pure diffusion prevails in spite of the electrical field that will overtake diffusion-driven transport after a transition time. It is shown that the reason for this change in mechanisms is the search for the maximization of the ionic transfer. In the numerical part, the impact of already contaminated porous medium on the amount of ionic species transferred is studied, together with the effect of the concentration and concentration gradients levels. Finally, an optimization method is proposed in order to maximize the transport of species by applying an electrical field increasing in time.


Articles with similar content:

Inhomogeneous thermal effect on ion transport in charged nanochannel
International Heat Transfer Conference 16, Vol.19, 2018, issue
Moran Wang, Yuankai Yang
Scale Analysis of Electrodiffusion Through Porous Media
Journal of Porous Media, Vol.9, 2006, issue 4
J. P. Ollivier, Sylvie Lorente
Computational Homogenization of Nonlinear Hydromechanical Coupling in Poroplasticity
International Journal for Multiscale Computational Engineering, Vol.4, 2006, issue 5-6
Fernando A. Rochinha, Marcio A. Murad, Jesus A. Luizar-Obregon
FLOW INTO VERTICAL CHANNELS IN THE PRESENCE OF BLOCKS: HEAT TRANSFER CHARACTERISTICS
Heat Transfer Research, Vol.45, 2014, issue 1
Bekir S. Yilbas, S. Z. Shuja
EMULSION PROBLEMS IN LIQUID-LIQUID SEPARATION UNITS OF CHEMICAL PROCESSES
ICHMT DIGITAL LIBRARY ONLINE, Vol.5, 1997, issue
F. Sauer, P. Deckert, M. Holzbecher