Modelling fluid flow in fractured‐porous rock masses by finite‐element techniques

Modelling fluid flow in fractured‐porous rock masses by finite‐element techniques One of the major difficulties of modelling fluid flow processes in hard‐rock geologies is the complex nature of the porosity systems. Hydraulic behaviour in these rock masses is characterized by both porous and fractured interflow zones. Traditionally, fractured‐porous rocks have been modelled as an equivalent porous medium or as a system of fractures separated by impermeable blocks. A new method is proposed that unifies these two approaches for modelling fluid flow processes in fractured‐porous media. The basic idea is to use a combination of isoparametric elements for the porous zones and line elements for the fractures. The coupling between the governing equations for each element type is achieved using the superposition principle. The effectiveness of the new approach is demonstrated by comparing numerical solutions with known solutions for problems of flow and solute transport in fractured‐porous media. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal for Numerical Methods in Fluids Wiley

Modelling fluid flow in fractured‐porous rock masses by finite‐element techniques

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Publisher
Wiley
Copyright
Copyright © 1984 John Wiley & Sons, Ltd
ISSN
0271-2091
eISSN
1097-0363
D.O.I.
10.1002/fld.1650040404
Publisher site
See Article on Publisher Site

Abstract

One of the major difficulties of modelling fluid flow processes in hard‐rock geologies is the complex nature of the porosity systems. Hydraulic behaviour in these rock masses is characterized by both porous and fractured interflow zones. Traditionally, fractured‐porous rocks have been modelled as an equivalent porous medium or as a system of fractures separated by impermeable blocks. A new method is proposed that unifies these two approaches for modelling fluid flow processes in fractured‐porous media. The basic idea is to use a combination of isoparametric elements for the porous zones and line elements for the fractures. The coupling between the governing equations for each element type is achieved using the superposition principle. The effectiveness of the new approach is demonstrated by comparing numerical solutions with known solutions for problems of flow and solute transport in fractured‐porous media.

Journal

International Journal for Numerical Methods in FluidsWiley

Published: Apr 1, 1984

References

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