Consultez les proceedings de la Conference COMSOL 2020
Modeling of Usage of Air Injection Well in a Geothermal System
Natural groundwater flow can increase the efficiency of geothermal system. But groundwater flow is not available everywhere. A patented new idea is to use air injection well to create artificial flow in sandy or gritty soils. The governing equations of fluid flow and heat transfer ... En savoir plus
Using COMSOL for the Transport Modelling of Some Special Cases in a Bentonite Buffer in a Final Repository for Spent Nuclear Fuel
The bentonite barrier is an essential part of a safe spent fuel repository in granitic bedrock. In this work COMSOL Multiphysics® is used in modelling the Thermal (T), Hydrological (H), Mechanical (M) and Chemical (C) phenomena and processes taking place in a bentonite buffer. Special ... En savoir plus
Modeling Soil Water Dynamics with Time-Variable Soil Hydraulic Properties
Modeling soil water dynamics requires an accurate description of soil hydraulic properties, i.e. the retention and hydraulic conductivity functions. Generally, these functions are assumed to be unchanged over time in most simulation studies. In this paper, we implemented temporal changes ... En savoir plus
Benchmark Calculations with COMSOL of the Transport of Radionuclides Through Clay and Bentonite Barriers in a Geological Repository
A benchmark study was carried out by the Swiss Nuclear Safety Inspectorate (ENSI) in collaboration with the Laboratory for Waste Management (LES) of the Paul Scherrer Institute (PSI) in order to evaluate the capabilities of the program COMSOL for the calculation of the transport of ... En savoir plus
Simulation of Incompressible Flow through Rhombohedric Pores
Advances in visualization and discretization of pore structures by means of Computed Tomography, and rapidly increasing computational capabilities, allow numerical modeling of pore-scale fluid flow based on the incompressible Navier-Stokes equations rather than using a macroscopic ... En savoir plus
Computation of the Longitudinal Dispersion Coefficient in an Adsorbing Porous Medium Using Homogenization
The method to derive upscaled expressions for the dispersion coefficients for reactive flow in a porous medium uses a periodic unit cell (PUC), which consists for instance of a spherical grain in a cube, but nothing prohibits defining more complex PUC's. Homogenization leads to a coupled ... En savoir plus
Simulated Annealing and Genetic Algorithm Optimization using COMSOL Multiphysics®: Applications to the Analysis of Ground Deformation in Active Volcanic Areas
We combine the potentiality of COMSOL with Monte Carlo optimization procedures, referred to as Simulated Annealing and Genetic Algorithm, in order to analyze and interpret ground deformation measured in active volcanic areas. Through MATLAB® subroutines, we use FE (Finite Element) ... En savoir plus
A Finite Element Test of the 2002-2003 Etna Eruption
Structural, morphological and ground deformation studies suggest that the eastern flank of Mt. Etna (eastern Sicily) is spreading seaward. Three contrasting models have been proposed: deep-seated spreading, shallow sliding and tectonic block movements. In order to better understand the ... En savoir plus
Safe Storage Parameters During CO2 Injection Using Coupled Reservoir-Geomechanical Analysis
Safe short term storage of CO2 depends mainly on structural and solubility trapping. On longer term, mineral trapping is also contributing to the trapping of CO2. To be able to investigate the importance of these different storage mechanisms, a finite element model for simulation of CO2 ... En savoir plus
State of Stress of Subducting Slabs from Viscoelastic Plane Strain Numerical Modelling
Using 2D viscoelastic plane strain models we investigate the dependency of the stress field of slabs on geometry and kinematics of subduction zones (relative velocity of interacting plates and their absolute velocity with respect to the mantle). We conclude that the concentration of Von ... En savoir plus