Coupled consolidation and contaminant transport in compressible porous media

Patrick Joseph Fox, Jangguen Lee, John J. Lenhart

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper presents an experimental and computational investigation of coupled consolidation and contaminant transport in compressible porous media. Numerical simulations were performed using the CST2 computational model in which a dual-Lagrangian framework is used to separately follow the motions of fluid and solid phases during consolidation. Diffusion and large strain consolidation tests were conducted on composite specimens of kaolinite slurry consisting of an upper uncontaminated layer and a lower layer contaminated with potassium bromide. An assessment of the importance of the consolidation process on solute transport is based on measured and simulated solute breakthrough curves and final contaminant concentration profiles. CST2 simulations closely match the experimental data for several different transport and loading conditions. Both diffusion and consolidation-induced advection made important contributions to solute transport and mass outflow. This study suggests that neglecting to consider transient consolidation effects may lead to significant errors in transport analyses involving soft contaminated clays undergoing large volume change.

Original languageEnglish (US)
Title of host publication12th International Conference on Computer Methods and Advances in Geomechanics 2008
Pages1162-1169
Number of pages8
Volume2
StatePublished - 2008
Event12th International Conference on Computer Methods and Advances in Geomechanics 2008 - Goa, India
Duration: Oct 1 2008Oct 6 2008

Other

Other12th International Conference on Computer Methods and Advances in Geomechanics 2008
CountryIndia
CityGoa
Period10/1/0810/6/08

Fingerprint

Contaminant Transport
Consolidation
pollutant transport
Porous Media
Porous materials
porous medium
consolidation
Impurities
Solute Transport
Solute transport
solute transport
Large Strain
Kaolinite
Advection
volume change
breakthrough curve
Potassium
bromide
Computational Model
slurry

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Applied Mathematics

Cite this

Fox, P. J., Lee, J., & Lenhart, J. J. (2008). Coupled consolidation and contaminant transport in compressible porous media. In 12th International Conference on Computer Methods and Advances in Geomechanics 2008 (Vol. 2, pp. 1162-1169)
Fox, Patrick Joseph ; Lee, Jangguen ; Lenhart, John J. / Coupled consolidation and contaminant transport in compressible porous media. 12th International Conference on Computer Methods and Advances in Geomechanics 2008. Vol. 2 2008. pp. 1162-1169
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Fox, PJ, Lee, J & Lenhart, JJ 2008, Coupled consolidation and contaminant transport in compressible porous media. in 12th International Conference on Computer Methods and Advances in Geomechanics 2008. vol. 2, pp. 1162-1169, 12th International Conference on Computer Methods and Advances in Geomechanics 2008, Goa, India, 10/1/08.

Coupled consolidation and contaminant transport in compressible porous media. / Fox, Patrick Joseph; Lee, Jangguen; Lenhart, John J.

12th International Conference on Computer Methods and Advances in Geomechanics 2008. Vol. 2 2008. p. 1162-1169.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - This paper presents an experimental and computational investigation of coupled consolidation and contaminant transport in compressible porous media. Numerical simulations were performed using the CST2 computational model in which a dual-Lagrangian framework is used to separately follow the motions of fluid and solid phases during consolidation. Diffusion and large strain consolidation tests were conducted on composite specimens of kaolinite slurry consisting of an upper uncontaminated layer and a lower layer contaminated with potassium bromide. An assessment of the importance of the consolidation process on solute transport is based on measured and simulated solute breakthrough curves and final contaminant concentration profiles. CST2 simulations closely match the experimental data for several different transport and loading conditions. Both diffusion and consolidation-induced advection made important contributions to solute transport and mass outflow. This study suggests that neglecting to consider transient consolidation effects may lead to significant errors in transport analyses involving soft contaminated clays undergoing large volume change.

AB - This paper presents an experimental and computational investigation of coupled consolidation and contaminant transport in compressible porous media. Numerical simulations were performed using the CST2 computational model in which a dual-Lagrangian framework is used to separately follow the motions of fluid and solid phases during consolidation. Diffusion and large strain consolidation tests were conducted on composite specimens of kaolinite slurry consisting of an upper uncontaminated layer and a lower layer contaminated with potassium bromide. An assessment of the importance of the consolidation process on solute transport is based on measured and simulated solute breakthrough curves and final contaminant concentration profiles. CST2 simulations closely match the experimental data for several different transport and loading conditions. Both diffusion and consolidation-induced advection made important contributions to solute transport and mass outflow. This study suggests that neglecting to consider transient consolidation effects may lead to significant errors in transport analyses involving soft contaminated clays undergoing large volume change.

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Fox PJ, Lee J, Lenhart JJ. Coupled consolidation and contaminant transport in compressible porous media. In 12th International Conference on Computer Methods and Advances in Geomechanics 2008. Vol. 2. 2008. p. 1162-1169