Coupled thermo-hydro-mechanical-chemical processes in by Ove Stephanson (Eds.)

By Ove Stephanson (Eds.)

One of the most crucial and interesting present steps ahead in geo-engineering is the improvement of coupled numerical versions. They characterize the fundamental physics of geo-engineering approaches that may comprise the consequences of warmth, water, mechanics and chemistry. Such versions supply an integrating concentration for the wide variety of geo-engineering disciplines.The articles inside of this quantity have been initially provided on the inaugural GeoProc convention held in Stockholm and include a set of strangely prime quality info no longer to be had in different places in an edited and coherent shape. This assortment not just merits from the newest theoretical advancements but in addition applies them to a couple of functional and vast ranging purposes. Examples comprise the environmental matters round radioactive waste disposal deep in rock, and the hunt for brand spanking new reserves of oil and fuel.

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Extra info for Coupled thermo-hydro-mechanical-chemical processes in geo-systems: fundamentals, modelling, experiments and applications, GeoProc2003 conference held at the Royal Institute of Technology in Stockholm, Sweden, in October 2003

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Different models are based on different assumptions. Testing the different assumptions with various experiments is therefore a central part of many laboratory and field experiments. 3. PROCESSES AND MECHANISMS THAT AFFECT FLOW AND TRANSPORT IN FRACTURED ROCK Bodin et al. (2003a) have recently made a thorough compilation of flow and transport processes in fractured rocks. Below only a short summary is made of processes deemed to be relevant for this paper. We would wish to follow a small packet of contaminated water and study the fate of the mass of nuclides it carries.

This gives a spread in the RTD (dispersion) that is within the range of observed values in the field. The standard deviation of the transmissivities of the channels in the network model was chosen such that the RTD of a nonsorbing tracer also has a Pe=10. In the time scale presented there seem not be dramatic differences between the model results for the Network and the ADmodels. It should be noted, however, that the early arrival times are of special interest for radionuclides that decay. There the differences are considerable.

1986) CN\^'RA (UDEC code, DEM model) Vertical synmjctry and simplifiedfracturenetwork with 295 fractures, 337 blocks, 1540 finite diflferencc elements, and 10853 nodes. A snull iimer region with randomfracturesand lager outer region withregularartificial fractures FTASCA (FLAG code, FDM model) Equivalent continuum approach with FDM (735 fiiute ifference elements and 792 nodes)witbout formal homogemzation. Vertical syTnmetry and inhcHnogeneous penneabitir>' Figure 2. Reference fracture network from Stripa Mine for BMT3 (DECOVALEX I) INERIS (UDEC code, DEM model) Displacement results agreed reasonably well among the research teams and between discrete and continuum approaches.

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