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Simulating thermal remediation in porous media

Resource type
Thesis type
(Thesis) M.Sc.
Date created
2022-12-13
Authors/Contributors
Abstract
Remediation techniques involving thermal treatment technologies, such as thermal conductive heating, are effective at removing non-aqueous phase liquids (NAPL) from soils. In this process, co-located cylindrical heaters and extractors are placed in the soil. As the soil heats up, the contaminants vaporize and are removed by the extractors. In this thesis, we present a numerical model for the remediation of contaminated soil. This numerical model couples a continuum model of the temperature in the soil with a macroscopic invasion percolation (Macro-IP) model to capture the dynamics of the gas migration. The heat transport is modelled using a finite difference scheme and macro-IP uses constitutive relations to describe the fluid and gas phases. Finally, we compare the results of the Macro-IP model with a simpler Stefan problem in one dimension. The results show that the dynamics of the NAPL front are primarily determined by the time the location reaches a depth-dependent temperature, and only weakly on the amount of NAPL initially present. Moreover, it is unclear whether the additional model fidelity provided by including the Macro-IP step is necessary to make reasonable predictions of how long the heaters need to run.
Document
Extent
52 pages.
Identifier
etd22262
Copyright statement
Copyright is held by the author(s).
Permissions
This thesis may be printed or downloaded for non-commercial research and scholarly purposes.
Supervisor or Senior Supervisor
Thesis advisor: Williams, JF
Language
English
Member of collection
Download file Size
etd22262.pdf 3.5 MB

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