3D hydro-mechanically coupled groundwater flow modelling of Pleistocene glaciation effects

Rühaak, W.; Bense, Victor; Sass, Ingo

doi:10.1016/j.cageo.2014.03.001

Cited by 17 publications

(8 citation statements)

References 26 publications

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“…FlexPDE (www.pdesolutions.com) is a general purpose scripted finite element model builder for partial differential equations. Developments and recent applications include the field of coupled thermo-hydrological modelling (Bense et al, 2012;Bense et al, 2009) as well as geomechanical couplings (Rühaak et al, 2014).…”

Section: Figure Captionsmentioning

confidence: 99%

Groundwater flow and heat transport for systems undergoing freeze-thaw: Intercomparison of numerical simulators for 2D test cases

Grenier

Anbergen²,

Bense

et al. 2018

Advances in Water Resources

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120

103

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Section: Figure Captionsmentioning

confidence: 99%

Groundwater flow and heat transport for systems undergoing freeze-thaw: Intercomparison of numerical simulators for 2D test cases

Grenier

Anbergen²,

Bense

et al. 2018

Advances in Water Resources

Self Cite

120

103

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“…For the energy balance, the heat transport equation without convective heat transport and without source and sink terms was taken into account (Rühaak et al 2014;Ingebritsen et al 2006):…”

Section: Implementing the Numerical Simulations In 2-dmentioning

confidence: 99%

“…Where is Lamé's first parameter [-], is Lamé's second parameter [MPa], the displacement vector and the volume force. Since temperature differences are sources for stress and induce volume changes, the volume force must be considered, which is denoted as following (Rühaak et al 2014):…”

Section: Implementing the Numerical Simulations In 2-dmentioning

confidence: 99%

“…One important aspect of the safety assessments is the evaluation of thermo-mechanical (TM) effects created by elevated temperatures in host rock and overburden. Important tools for the safety assessments are coupled numerical models, which allow the evaluation of these effects (Birkholzer et al 2019;Rühaak et al 2017;Rühaak et al 2014). These numerical models generally incorporate geometrical information from 3-D geological models to parameterize the simulations according to properties in major geological domains.…”

Section: Introductionmentioning

confidence: 99%

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The Role of Geological Models and Uncertainties in Safety Assessments

Bjorge¹,

Kreye²,

Heim

et al. 2021

Preprint

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Safety assessments in nuclear waste management typically include the analysis of thermo-mechanical (TM) coupled processes. The TM behavior of the host rock is, amongst other aspects, dependent on the prevalent geological geometry. This study aims to evaluate the impact of uncertainties in geometry on the TM rock behavior. It is one of the very first studies aiming to bring uncertainties of structural geological models and numerical simulations together.To analyze the influence of geological geometries, a simplified model of the region around the Mont Terri rock laboratory was created. A 3-D structural geological model was set up and uncertainties of the lithological contacts were quantified by means of stochastic simulations, resulting in an ensemble of 89 model realizations. These realizations were transformed to a 2-D numerical model. In this numerical model, TM simulations were computed over a simulation time of 500 years, employing the Finite Element Method. To simulate a heat source of nuclear waste the lower edge of the model was set to 100°C.The results of these simulations show mean temperature variations of 90.89 °C and 92.70 ° after 500 years, with a maximum stress varying between 0.02 MPa and 0.16 MPa of elastic shear energy density and according mean cumulative displacements ranging from 30 cm to 38 cm. The presented results indicate that different model geometries and differences in material properties lead to noticeable variabilities of the TM behavior of claystone. However in this case, these variabilities would not significantly affect the integrity of the rock.

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“…A number of numerical simulation tools have been presented to model THMC processes [16][17][18]. While considering a similar mathematical approach, our work introduces the following new features with respect to previous studies: (i) it combines the global deformation of the lithosphere with the local simulation of pressure and temperature fields; (ii) it is built on available geophysical and geological information on the whole sedimentary system and relying on information available at selected wells; (iii) it allows considering the effects of erosion induced by glaciation, which is often neglected in previous studies.…”

Section: Introductionmentioning

confidence: 99%

Multiscale Modeling of Glacial Loading by a 3D Thermo-Hydro-Mechanical Approach Including Erosion and Isostasy

et al. 2019

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We present a computational framework that allows investigating the Thermo-Hydro- Mechanical response of a representative part of a sedimentary basin during a glaciation cycle. We tackle the complexity of the problem, arising by the mutual interaction among several phenomena, by means of a multi-physics, multi-scale model with respect to both space and time. Our contribution addresses both the generation of the computational grid and the algorithm for the numerical solution of the problem. In particular we present a multi-scale approach accounting for the global deformation field of the lithosphere coupled with the Thermo-Hydro-Mechanical feedback of the ice load on a representative part of the domain at a finer scale. In the fine scale model we also include the erosion possibly caused by the ice melting. This methodology allows investigating the evolution of the sedimentary basin as a response to glaciation cycle at a fine scale, taking also into account the large spatial scale movement of the lithosphere due to isostasy. The numerical experiments are based on the analysis of simple scenario, and show the emergence of effects due to the multi-physics nature of the problem that are barely captured by simpler approaches.

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3D hydro-mechanically coupled groundwater flow modelling of Pleistocene glaciation effects

Cited by 17 publications

References 26 publications

Groundwater flow and heat transport for systems undergoing freeze-thaw: Intercomparison of numerical simulators for 2D test cases

Groundwater flow and heat transport for systems undergoing freeze-thaw: Intercomparison of numerical simulators for 2D test cases

The Role of Geological Models and Uncertainties in Safety Assessments

Multiscale Modeling of Glacial Loading by a 3D Thermo-Hydro-Mechanical Approach Including Erosion and Isostasy

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