Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Journal of Porous Media
Fator do impacto: 1.49 FI de cinco anos: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

Volume 22, 2019 Volume 21, 2018 Volume 20, 2017 Volume 19, 2016 Volume 18, 2015 Volume 17, 2014 Volume 16, 2013 Volume 15, 2012 Volume 14, 2011 Volume 13, 2010 Volume 12, 2009 Volume 11, 2008 Volume 10, 2007 Volume 9, 2006 Volume 8, 2005 Volume 7, 2004 Volume 6, 2003 Volume 5, 2002 Volume 4, 2001 Volume 3, 2000 Volume 2, 1999 Volume 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v11.i8.30
pages 733-750

Role of Geometry of Capillary Bundles on Flow Reversal in Electrokinetic Soil Reclamation: A Comparative Study Based on the Microscopic Scale

Mario A. Oyanader
Department of Chemical Engineering, Universidad Catolica del Norte, 0610 Antofagasta, Chile
Pedro Arce
Chemical Engineering, Tennessee Technological University, Cookeville, TN 38505, USA
Andrew Dzurik
Civil and Environmental Engineering Department, Florida State University, Tallahassee, FL 32310-6046, USA


In this contribution, we focus on a fundamental analysis of flow regimes possibly found at the microscopic scale in electrokinetic soil remediation. To accomplish this objective, a capillary bundle with three different geometries (i.e., rectangular, cylindrical, and annular) has been used to describe the microscopic-level structure of the soil domain. The analysis considers the simultaneous effects of different transport driving forces responsible for the motion of the bulk fluid and solute species, i.e., electro-osmosis, electromigration, buoyancy, and advection. The presence of these collaborative and competing forces, usually ignored or not taken into account completely, promotes distinct flow regimes that may explain important field test results. Several numerical examples are used to illustrate the flow situations found in the system for a selection of values of the parameter space. From the analysis and comparison of these graphic representations, a qualitative and semiquantitative description of the different flow regimes inside the capillary channel is obtained. In particular, the role of the capillary geometry on flow reversal is analyzed in detail, and its implications for mixing as a possible cause of lowering efficiency in soil cleaning by electrokinetic-based methods are highlighted.

Articles with similar content:

Ion Transport during Drying in a Porous Mediumunder High External Relative Humidity Conditions
Journal of Porous Media, Vol.12, 2009, issue 6
Marc Prat, Sassi Ben Nasrallah, N. Sghaier
Non-Linear Effects in Wire Antennas with Non-Linear Surface Impedance
Telecommunications and Radio Engineering, Vol.65, 2006, issue 11-15
D. S. Gavva, A. I. Luchaninov
Migration versus Diffusion through Porous Media: Time-Dependent Scale Analysis
Journal of Porous Media, Vol.9, 2006, issue 7
P. Begue, Sylvie Lorente
Identification of Models of Geomagnetic Activity and Space Weather Prediction
Journal of Automation and Information Sciences, Vol.41, 2009, issue 12
Oleg K. Cheremnykh, Vsevolod M. Kuntsevich, Vitaliy A. Yatsenko, Oleg V. Semeniv
Head and Mass Transfer with Hydrodynamic Fractionation of Dispersed Systems under the Conditions of Adiabatic Flow Boiling
Heat Transfer Research, Vol.33, 2002, issue 3&4
A. A. Dolinsky, B. I. Basok