Three-dimensional coupled model of consolidation and solute transport for porous media
Fang Yuanfang , Zhang Zhihong , Du Xiuli
DOI:
Received November 02, 2014,Revised , Accepted , Available online July 22, 2015
Volume ,2015,Pages 53-62
- Abstract
The coupling effect of consolidation caused by the waste and the cover, and the solute transport has been widely studied in the field of environmental civil engineering. Based on Biot consolidation theory and solute transport theory, a three-dimensional coupled model of consolidation and solute transport is thus developed and in the modeltheporosity is thecoupled parameter and consolidation equations is linked with transport equations.The influence of consolidation on solute transport parameters is taken into consideration as well.. Then, the 3D model coupling the consolidation and solute transport is establishedusing the finite elementsoftware COMSOL Multiphysics.The numerical results show that consolidation deformation retards the transport process of solute leading to decrease in contaminant plume and the transport depth in vertical direction and has a strong and long-term influence on the transport of soluteThe transport distance decreasing rate increased over time and reache27.75% in 20 years ; the transport distance in the horizontal direction of contaminant concentration increases with the increasing of lateral hydraulic gradient.