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A functional relation for field-scale nonaqueous phase liquid dissolution developed using a pore network model

Journal of Contaminant Hydrology

By:
, ,
DOI: 10.1016/S0169-7722(00)00171-6

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Abstract

A pore network model with cubic chambers and rectangular tubes was used to estimate the nonaqueous phase liquid (NAPL) dissolution rate coefficient, Kdissai, and NAPL/water total specific interfacial area, ai. Kdissai was computed as a function of modified Peclet number (Pe???) for various NAPL saturations (SN) and ai during drainage and imbibition and during dissolution without displacement. The largest contributor to ai was the interfacial area in the water-filled corners of chambers and tubes containing NAPL. When Kdissai was divided by ai, the resulting curves of dissolution coefficient, Kdiss versus Pe??? suggested that an approximate value of Kdiss could be obtained as a weak function of hysteresis or SN. Spatially and temporally variable maps of Kdissai calculated using the network model were used in field-scale simulations of NAPL dissolution. These simulations were compared to simulations using a constant value of Kdissai and the empirical correlation of Powers et al. [Water Resour. Res. 30(2) (1994b) 321]. Overall, a methodology was developed for incorporating pore-scale processes into field-scale prediction of NAPL dissolution. Copyright ?? 2001 .

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A functional relation for field-scale nonaqueous phase liquid dissolution developed using a pore network model
Series title:
Journal of Contaminant Hydrology
DOI:
10.1016/S0169-7722(00)00171-6
Volume
48
Issue:
1-2
Year Published:
2001
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Contaminant Hydrology
First page:
89
Last page:
119
Number of Pages:
31