Effect of nonlinear flow on DNAPL migration in a rough-walled fracture

Experiments were carried out to investigate the influence of the groundwater flow regime on dense nonaqueous phase liquid (DNAPL) migration in a rough-walled fracture. Hydraulic and DNAPL migration experiments were performed at Reynolds numbers ranging from 0 to 60.8. Nonlinear groundwater flow occu...

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Bibliographic Details
Published inWater resources research Vol. 44; no. 11
Main Authors Ji, S.H, Lee, H.B, Yeo, I.W, Lee, K.K
Format Journal Article
LanguageEnglish
Published 01.11.2008
Subjects
dense nonaqueous phase liquids
environmental models
groundwater contamination
groundwater flow
hydrologic models
nonlinear models
pollutants
rocks
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Summary:Experiments were carried out to investigate the influence of the groundwater flow regime on dense nonaqueous phase liquid (DNAPL) migration in a rough-walled fracture. Hydraulic and DNAPL migration experiments were performed at Reynolds numbers ranging from 0 to 60.8. Nonlinear groundwater flow occurred in the fracture from Reynolds number of approximately 10. Different migration paths taken by DNAPL were observed between linear and nonlinear flow regimes. Experiments were quantitatively analyzed using the modified invasion percolation (MIP) model, which was found to be attributed to the inertial force of flowing groundwater. The MIP model was reformulated to incorporate the effect of inertia to predict the DNAPL migration path in a rough-walled fracture. The model data provided a good match to the experimentally determined DNAPL migration. The studies indicated that DNAPL migration depended on the groundwater flow regime, which needs to be considered in order to better understand DNAPL migration in rock fractures.
Bibliography:http://dx.doi.org/10.1029/2007WR006712
ISSN:0043-1397
1944-7973
DOI:10.1029/2007WR006712