Simulation For Charged Nanoparticles Transportation In Porous Media Under An Applied Electric Field

Soft soil treatment technology has became more and more important in the recent years as our country,s economy improved,especially in the field of slope treatment and foundation treatment.It has improved in the recent years since kinds of new technology were came forward.Treatment methods of soft soil contain mechanical method? physical method? admixture method? heat treatment method and Electrochemical method now.Each method works with its own condition and advantage and nano-electrochemical techniques was one of the best which was seen as kind of milestone.The use of nanotechnology in the electrochemical treatment of soft soil foundation or weak soils were reported with lots of advantage in present researchs,suah as lasting consolidation?environmental protection and low cost.However,the mechanism of particle tracing in the technology is unclear.It is necessary to simulate the nano-particle tracing in the electroosmosis to clarify the mechanism in the process.This paper launches the finite element method analysis in particle tracing in porous media from following aspects mainly:(1)Modeling the nano-Fe3o4 interaction with fluid in the porous media with COMSOL Multiphysics after create the 2-D soil geometry with randomly distributed voids using MATLAB.(2)The fluorescent tracer technique was used to verify the finite element model,the nano particle was replaced with color group in acriflavine which owns similar charge and particle size.(3)Carrying on the particles tracing and fluid distribution analysis in following aspects: applied electric field?particle size?particle charge and porosity of porous media based on the simulation results,which is helpful to the design of experimental about electrochemical treatment of soft soil.