Simulation of fracture rock solute transport with multidimensional dual-porosity model
Result description
We propose a combined model, where the entities of fractured rock structure are represented by means of corresponding 1-D, 2-D (fractures) or 3-D (rock continuum) elements, each including dualporosity (mobile and immobile zone). The transport is governedby the advection?diffusion equation in each of the 1-D, 2-D and 3-D domains, coupled with first-order mobile-immobile exchange and solved using a finite-volume numerical scheme. We solve a test problem of contaminant breakthrough through a single fracture surrounded by rock. Then we compare representations by a 1-D coupled mobile and immobile zone geometrically identical to fracture, the 1-D mobile zone as fracture and the 2-D mobile zone as the rock. The results confirm similarity in macroscopic behaviour of both models such that the difference between the results is less then 5% of the ratio of fracture and rock conductivity higher than 100.
Keywords
discrete fracture networkdual-porosityimmobile zonesolute retention
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Simulation of fracture rock solute transport with multidimensional dual-porosity model
Original language description
We propose a combined model, where the entities of fractured rock structure are represented by means of corresponding 1-D, 2-D (fractures) or 3-D (rock continuum) elements, each including dualporosity (mobile and immobile zone). The transport is governedby the advection?diffusion equation in each of the 1-D, 2-D and 3-D domains, coupled with first-order mobile-immobile exchange and solved using a finite-volume numerical scheme. We solve a test problem of contaminant breakthrough through a single fracture surrounded by rock. Then we compare representations by a 1-D coupled mobile and immobile zone geometrically identical to fracture, the 1-D mobile zone as fracture and the 2-D mobile zone as the rock. The results confirm similarity in macroscopic behaviour of both models such that the difference between the results is less then 5% of the ratio of fracture and rock conductivity higher than 100.
Czech name
Model transportu látky v prostřední rozpukané horniny pomocí tzv. multidimenzionálního přístupu kombinovaného s modelem dvojí porozity
Czech description
Je definován model transportu látky v prostřední rozpukané horniny pomocí tzv. multidimenzionálního přístupu kombinovaného s modelem dvojí porozity (mobilní a imobilní zóna) pro každou dimenzi. Je řešena modelová úloha transportu na lineární puklině obklopené vrstvou horninové matrice a na profilech a průnikových křivkách porovnány výsledky pro různé varianty modelu.
Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DJ - Pollution and water control
OECD FORD branch
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Result continuities
Project
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IAHS
ISSN
0144-7815
e-ISSN
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Volume of the periodical
2008
Issue of the periodical within the volume
Publ. 320
Country of publishing house
FR - FRANCE
Number of pages
6
Pages from-to
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UT code for WoS article
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EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
DJ - Pollution and water control
Year of implementation
2008