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Effects of multi-level surface roughness on solute transport in single rock fractures
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering. (Engineering Geology and Geophysics)
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering. (Engineering Geology and Geophysics)
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2016 (English)In: The proceeding of International Symposium on Reducing Risks in Site Investigation, Modeling and Construction for Rock Engineering, 2016Conference paper, Published paper (Refereed)
Abstract [en]

Natural rock fractures are consisted of complicate rough surfaces with multi-level surface roughness which causes significant uncertainties in fluid flow and solute transport be-haviors through fractured rocks. In this study, for the aim of investigation the effects of multi-level surface roughness on fluid flow and solute transport in rock fractures, a single rough-walled fracture model was built from a scanned granite rock surface, which was then gradually decomposed and characterized by wavelet analysis and statistics. A verified finite volume method (FVM) code was used to simulate fluid flow and solute transport in the rough fracture models by solving the Navier-Stokes equations (NSE) and advection-dispersion equation (ADE). The simulation results of nonlinear flow and solute breakthrough curves (BTCs) showed that the multi-level surface roughness strongly correlated with the Eddy flows and the solute non-Fickian transport behaviors, represented by the changes of effective advective flow apertures and an empirical function of the BTCs. The results would improve our understanding of solute transport in fractured rocks and may help to reduce the uncertainties and risks in related engi-neering practices.

Place, publisher, year, edition, pages
2016.
Keyword [en]
fracture surface roughness, Wavelet analysis, Solute transport, numerical modeling
National Category
Geophysical Engineering
Research subject
Land and Water Resources Engineering
Identifiers
URN: urn:nbn:se:kth:diva-193674OAI: oai:DiVA.org:kth-193674DiVA: diva2:1033571
Conference
GEOSAFE2016: 1st International Symposium on Reducing Risks in Site Investigation, Modeling and Construction for Rock Engineering
Note

QC 20161010

Available from: 2016-10-07 Created: 2016-10-07 Last updated: 2016-10-12Bibliographically approved

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Zou, LiangchaoJing, LanruCvetkovic, Vladimir
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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Output format
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  • asciidoc
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