Details
| Original language | English |
|---|---|
| Pages (from-to) | 52-63 |
| Number of pages | 12 |
| Journal | Advances in water resources |
| Volume | 84 |
| Early online date | 29 Jul 2015 |
| Publication status | Published - Oct 2015 |
Abstract
Density-driven, haline free convection in fractured porous rock is studied in a 3-dimensional numerical model to evaluate the onset and interdependence of intra- and interfracture convection. When the rock matrix allows for solute diffusion, the most likely mode of convection in a regular fracture circuit is interfracture convection along the circuit such that regular fracture circuits can be modeled in a reduced dimensionality (2D) model. The critical Rayleigh number for the onset of interfracture convection in a regular fracture circuit is determined to be half of the critical Rayleigh number for convection in a single vertical fracture. In more complex fracture networks, vertical "dead-end fractures" and additional fracture intersections complicate convective patterns. Combined inter- and intrafracture convection is possible, such that convection is hard to predict.
Keywords
- 3-Dimensional, Density-driven flow, Groundwater Fractures, HydroGeoSphere, Numerical modeling
ASJC Scopus subject areas
- Environmental Science(all)
- Water Science and Technology
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In: Advances in water resources, Vol. 84, 10.2015, p. 52-63.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Combined inter- and intra-fracture free convection in fracture networks embedded in a low-permeability matrix
AU - Vujevic, Katharina
AU - Graf, Thomas
N1 - Publisher Copyright: © 2015 Elsevier Ltd.
PY - 2015/10
Y1 - 2015/10
N2 - Density-driven, haline free convection in fractured porous rock is studied in a 3-dimensional numerical model to evaluate the onset and interdependence of intra- and interfracture convection. When the rock matrix allows for solute diffusion, the most likely mode of convection in a regular fracture circuit is interfracture convection along the circuit such that regular fracture circuits can be modeled in a reduced dimensionality (2D) model. The critical Rayleigh number for the onset of interfracture convection in a regular fracture circuit is determined to be half of the critical Rayleigh number for convection in a single vertical fracture. In more complex fracture networks, vertical "dead-end fractures" and additional fracture intersections complicate convective patterns. Combined inter- and intrafracture convection is possible, such that convection is hard to predict.
AB - Density-driven, haline free convection in fractured porous rock is studied in a 3-dimensional numerical model to evaluate the onset and interdependence of intra- and interfracture convection. When the rock matrix allows for solute diffusion, the most likely mode of convection in a regular fracture circuit is interfracture convection along the circuit such that regular fracture circuits can be modeled in a reduced dimensionality (2D) model. The critical Rayleigh number for the onset of interfracture convection in a regular fracture circuit is determined to be half of the critical Rayleigh number for convection in a single vertical fracture. In more complex fracture networks, vertical "dead-end fractures" and additional fracture intersections complicate convective patterns. Combined inter- and intrafracture convection is possible, such that convection is hard to predict.
KW - 3-Dimensional
KW - Density-driven flow
KW - Groundwater Fractures
KW - HydroGeoSphere
KW - Numerical modeling
UR - http://www.scopus.com/inward/record.url?scp=84945952932&partnerID=8YFLogxK
U2 - 10.1016/j.advwatres.2015.07.014
DO - 10.1016/j.advwatres.2015.07.014
M3 - Article
AN - SCOPUS:84945952932
VL - 84
SP - 52
EP - 63
JO - Advances in water resources
JF - Advances in water resources
SN - 0309-1708
ER -