Main content

Three-Dimensional Numerical Model for Soil Vapour Extraction

Show simple item record Nguyen, Van Thin Zhao, Lian Zytner, Richard G. 2018-05-15T17:21:39Z 2018-05-15T17:21:39Z 2013
dc.description.abstract Mass transfer limitations impact the effectiveness of soil vapour extraction (SVE) and cause tailing. In order to identify the governing mass transfer processes, a three-dimensional SVE numerical model was developed. The developed model was based on Comsol Multiphysics® a finite element method and incorporates multi-phase flow, multi-component transport and non-equilibrium transient mass transfer. Model calibration was done against experimental data from previous lab-scale reactor experiments and a previously remediated site. The developed model, 3D-SVE, nicely simulates laboratory findings and allows for changes in the important governing mass transfer relationships. It was seen that a single averaged mass transfer value is a poor representation of the entire SVE operation and that a transient mass transfer coefficient is required to understanding SVE tailing. The laboratory results did not transfer well to the field, showing the presence of scale-up factors that are related to the increased mass transfer resistant taking place. Further research is required to elaborate on this scale-up factor. However, both lab and field scale calibration showed that the most important mass transfer is between NAPL and vapour phase, with the mass transfer coefficient values for aqueous to solid phase, and NAPL to aqueous phase being identical in both scenarios. en_US
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Soil vapour extraction en_US
dc.subject 3D numerical model en_US
dc.subject multiphase flow en_US
dc.subject multi-component transport en_US
dc.subject rate-limited mass transfer en_US
dc.title Three-Dimensional Numerical Model for Soil Vapour Extraction en_US
dc.type Preprint en_US School of Engineering en_US
dc.rights.license All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dcterms.relation Nguyen, Van Thinh & Zhao, Lian & Zytner, Richard. (2013). Three-dimensional numerical model for soil vapor extraction. Journal of contaminant hydrology. 147C. 82-95. 10.1016/j.jconhyd.2013.02.008.

Files in this item

Files Size Format View Description
3D_SVE_JCH_Manuscript_Final.pdf 908.1Kb PDF View/Open Nguyen 3D SVE JCH Final

This item appears in the following Collection(s)

Show simple item record