管伟明 , 聂欣 ,
L. Meacci, A. Farina, F. Rosso, I. Borsi, M. Ceseri, and A. Speranza
Dipartimento di Matematica U. Dini, Università degli Studi di Firenze, Firenze, Italy
The problem is to understand how a geothermal field can evolve from a water dominated state into a vapor dominated one. A first answer to this question is given by a simplified mathematical model of the dynamics of a geothermal field in which the geothermal fluid is entirely composed by pure H2O. We considered a 1-D geometry and we developed a dynamic model that presents a clear interface ...
Underground Coal Fire Extinction Model Using Coupled Reactive Heat and Mass Transfer Model in Porous Media
S. Suhendra, M. Schmidt, and U. Krause
Laboratory II.2: “Flammable Bulk Materials and Dusts, Solid Fuels”, Federal Institute for Materials Research and Testing (BAM), Berlin, Germany
Green house gases emission associated with natural hazard of underground coal seam fire has been recognized as a worldwide problem leading to global warming threat. Therefore, in this paper a model to study underground coal fire is presented and the results will be devoted to strategic development of coal fire extinction technology within the framework of Sino-German Coal Fire Research ...
T.I. Bjørnarå, E. Aker, and E. Skurtveit
NGI, Oslo, Norway
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 injection has been developed in COMSOL Multiphysics®. The model describes and solves for two-phase flow ...
Coupled Hydro-Mechanical Analysis of Excavation Damaged Zones around an Underground Opening in Sedimentary Rock
H. Abdi, E. Evgin, M. Fall, T.S. Nguyen, and G. Su
University of Ottawa, Ottawa, ON, Canada
Canadian Nuclear Safety Commission, Ottawa, ON, Canada
A large amount of research work has been carried out in many countries to determine the viability of radioactive waste disposal in deep geological repositories. It is well known that excavation can cause damage around underground openings. On the other hand, the mechanical damage can influence the stability of the opening and the flow characteristics of the rock mass. In addition, all physical ...
D. Sampietro , E. Abarca , H. von Schenck , J. Molinero 
 Amphos 21 Consulting S.L., Barcelona, Spain
 Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden
Radioactive waste repositories include barriers that work to contain the waste, thereby protecting human health and the environment. In deep geological disposal systems, barriers include the natural geological barrier and the engineered barrier system (EBS). The ability of the EBS to limit groundwater flow is important and optimized design solutions are often sought by means of numerical ...
A. Schwen, G. Bodner, A. Schnepf, D. Leitner, G. Kammerer, and W. Loiskandl
Institute of Hydraulics and Rural Water Management, Univ. Natural Resour. Appl. Life Sci., BOKU, Wien, Austria
Institute of Agronomy and Plant Breeding, Univ. Natural Resour. Appl. Life Sci., BOKU, Wien, Austria
Institute of Soil Science, Univ. Natural Resour. Appl. Life Sci., BOKU, Wien, Austria
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 in the soil hydraulic properties in a Richards’ equation simulation of soil water dynamics. Based on ...
E. Evgin, J. Infante Sedano, and Z. Fu
University of Ottawa
This paper is a part of a study on energy piles for heating and cooling of buildings. Energy piles are used for two reasons: (1) to transfer structural loads to foundation soils, and (2) to transfer heat from foundation soils to the building for space heating in winter time and for cooling purposes in summer time by transferring heat from the building to the foundation soils. The efficiency of ...
Computation of the Longitudinal Dispersion Coefficient in an Adsorbing Porous Medium Using Homogenization
A. Rijnks, M. Darwish, and H. Bruining
StatoilHydro ASA, Bergen, Norway
Shell Exploration & Production International Centre, Rijswijk,
Section of Geoengineering, Faculty of Civil Engineering and Geosciences, TU Delft, Delft, The Netherlands
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 system of equations where the flow is described by Stokes equation and the concentration fluctuation is ...
Numerical Inversion of Surface Deformation at Long Valley Caldera (California) By Using 3D Mechanical Models
S. Pepe, P. Tizzani, and A. Manconi
IREA-CNR, Napoli, Italy
We use 3D numerical models to analyze the ground deformation observed at Long Valley Caldera (LVC) between 1992 and 2000 via space-based geodetic techniques. More specifically, we implement a complex model that includes the topography and the material heterogeneities information of LVC. The 3D heterogeneous models are implemented of COMSOL models in a Genetic Algorithm optimization to constrain ...