NDLI: Hybrid analytical and finite element numerical modeling of mass and heat transport in fractured rocks with matrix diffusion

Content Provider	Springer Nature Link
Author	McDermott, Christopher I. Walsh, Robert Mettier, Ralph Kosakowski, Georg Kolditz, Olaf
Copyright Year	2008
Abstract	Quantification of mass and heat transport in fractured porous rocks is important to areas such as contaminant transport, storage and release in fractured rock aquifers, the migration and sorption of radioactive nuclides from waste depositories, and the characterization of engineered heat exchangers in the context of enhanced geothermal systems. The large difference between flow and transport characteristics in fractures and in the surrounding matrix rock means models of such systems are forced to make a number of simplifications. Analytical approaches assume a homogeneous system, numerical approaches address the scale at which a process is operating, but may lose individual important processes due to averaging considerations. Numerical stability criteria limit the contrasts possible in defining material properties. Here, a hybrid analytical–numerical method for transport modeling in fractured media is presented. This method combines a numerical model for flow and transport in a heterogeneous fracture and an analytical solution for matrix diffusion. By linking the two types of model, the advantages of both methods can be combined. The methodology as well as the mathematical background are developed, verified for simple geometries, and applied to fractures representing experimental field conditions in the Grimsel rock laboratory.
Starting Page	349
Ending Page	361
Page Count	13
File Format	PDF
ISSN	14200597
Journal	Computational Geosciences
Volume Number	13
Issue Number	3
e-ISSN	15731499
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-12-17
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fractured rock Matrix diffusion Contaminant transport Heat transport Numerical modeling Mathematical Modeling and Industrial Mathematics Soil Science & Conservation Hydrogeology Geotechnical Engineering
Content Type	Text
Resource Type	Article
Subject	Computers in Earth Sciences Computational Theory and Mathematics Computer Science Applications Computational Mathematics

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