M. Ding, J. Lin
MIT/WHOI Joint Program in Oceanography, Cambridge, MA, USA
Woods Hole Oceanographic Institution, Woods Hole, MA, USA
We used COMSOL Multiphysics 4.3 to simulate the 2D elastoplastic deformation and plastic strain in a wedge-shaped plate above a subducting interface. The modeling results reveal that a pair of conjugate normal faults would first appear in the thinner part of the plate. Subsequently, a second pair of conjugate thrust faults would form in the thicker part of the plate. The duration of the seamount ...
S.C. Seetharam, D. Jacques
Performance Assessments Unit, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK•CEN), Mol, Belgium
This paper documents current status in the development of a coupled thermal-hydraulic-chemical-geomechanical numerical suite within COMSOL-MATLAB environment to address soil and concrete applications. The mathematical formulations are based on well-established continuum scale models unifying mass conservation, energy conservation, charge conservation, thermodynamic equilibrium and kinetics and ...
Coupling Heat Transfer in Heat Pipe Arrays with Subsurface Porous Media Flow for Long Time Predictions of Solar Rechargeable Geothermal Systems
P. Oberdorfer, R. Hu, M. Azizur Rahman, E. Holzbecher, M. Sauter, P. Pärisch
Applied Geology, Geoscience Centre, University of Göttingen, Göttingen, Germany
Institute for Solar Energy Research Hameln/Emmerthal (ISFH), Emmerthal, Germany
An increased share of renewable energies is regarded as an integral part of a strategy towards a sustainable future. With regard to the heat supply sector this may be achieved using solar thermal collectors or heat pump systems with borehole heat exchangers. During the last years solar thermal and geothermal systems have generally been installed separately. Now, several proposals are discussed ...
O. Silva , E. Abarca , J. Molinero , U. Kautsky 
 Amphos 21 Consulting, Barcelona, Spain
 Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden
Radionuclide sorption is often simulated using a lumped approach where retention processes are represented by the distribution coefficient (Kd), which relates the radionuclide mass retained in the solid phase to its aqueous concentration. Classical Kd-based simulations rely on two strong assumptions: Kd depends on soil properties and is constant in time. However, sorption processes depend also ...
P. Barthelemy, and
Visualization Sciences Group, Burlington, MA, USA
Stanford University, Palo Alto, CA, USA
Understanding the rock structure at nano to micro scale is of growing importance in geology, oil and gas, and hydrology. New approaches that relies on a variety of high resolution 3D imaging techniques offered tremendous potential. These new approaches, in the meanwhile, introduce significant new challenges. Starting from digital imaging data, the paper introduces an image-to-simulation ...
E. D. Skouras , A. N. Kalarakis , M. S. Valavanides , V. N. Burganos ,
 Foundation for Research and Technology, Hellas/Institute of Chemical Engineering Sciences, Patras, Greece
 Dept of Mechanical Engineering, TEI of Western Greece, Patras, Greece
 Dept of Civil Engineering, Applied Mechanics Laboratory, TEI of Athens, Athens, Greece
In general, macroscopic two-phase flow in porous media is a mixture of connected and disconnected oil flow. The latter is expressed as ganglion dynamics and drop traffic flow, patterns observed experimentally in pore network models [1,2] and real porous media [3,4]. This characteristic was adversely not taken into account in previous modeling approaches. The mechanistic model DeProF , ...
C. K. C. Arruda , A. A. Silveira , L. C. R. Vieira , F. C. Dart ,
 CEPEL, Rio de Janeiro, RJ, Brazil
High Voltage Direct Current transmission (HVDC) is a suitable alternative for long distance transmission. During the years, the use of this technology has been increasing, which is one of the several reasons to improve methodologies in HVDC grounding systems. Unlike the usual approach in AC, a HVDC grounding system is distinguished by its operating procedures, which is, when it is configured ...
E. Evgin, J.A.I. Sedano , Z. Fu
University of Ottawa, Ottawa, ON, Canada
Energy piles transfer the mechanical loads from buildings to the ground and serve as heat exchangers. Temperature changes in the ground influence its moisture content. This paper examines the effect of soil moisture content on the shaft resistance of a pile. Tests were carried out in the laboratory to determine the mechanical properties of an interface corresponding to various soil moisture ...
S. Hoyer, U. Exner, M. Voorn, A. Rath
Department of Geodynamics and Sedimentology, University of Vienna, Austria
Museum of Natural History, Vienna, Austria
OMV ESG-D Production Geology, Vienna, Austria
Knowledge on flow behavior in fractured reservoir rocks is of great interest in petroleum engineering as well as for geothermal assets. Due to the big difference of magnitude (fracture aperture: ~?m, lateral extension of reservoirs ~km), modeling of discrete fracture flow is not practicable on the reservoir scale, so a Darcy (or Brinkman) approximation has to be found. The key task is to find ...
Georg-August Universität Göttingen, Göttingen, Germany
We examine the poroelastics mode, which couples hydraulics and mechanics by some basic benchmarks. For cases with analytical solutions we check the accuracy for changing meshes and calculate the convergence rate.