Analysis of Pore -Scale Nonaqueous Phase Liquid Dissolution in Etched Silicon Pore Network
Chomsurin, Cheema
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https://hdl.handle.net/2142/83203
Description
Title
Analysis of Pore -Scale Nonaqueous Phase Liquid Dissolution in Etched Silicon Pore Network
Author(s)
Chomsurin, Cheema
Issue Date
2003
Doctoral Committee Chair(s)
Werth, Charles J.
Department of Study
Civil and Environmental Engineering
Discipline
Civil and Environmental Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Hydrology
Language
eng
Abstract
NAPL volumes and surface areas were used as input parameters to calculate mass transfer coefficients for dissolution in all micromodel experiments. Mass transfer coefficients for the homogeneous and heterogeneous micromodels initially increased with water velocity but then leveled off to a relatively constant value. Also, these mass transfer coefficients varied with pore and NAPL blob geometry. Specifically, the mass transfer coefficient decreased with increasing blob size because larger blobs had more NAPL-water interfacial area not adjacent to flowing water, and with decreasing pore throat width to pore throat depth because NAPL interfaces in deeper more narrow pores were adjacent to more stagnant water. For each of these cases the mass transfer coefficient decreased because the average diffusion length adjacent to NAPL blobs increased.
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