Presentazioni e Articoli Tecnici

In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.

A Finite Element Test of the 2002-2003 Etna Eruption

F. Pulvirenti[1][2], M. Aloisi[1], G. De Guidi[2], M. Mattia[1], and C. Monaco[2]
[1]Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Catania, Italy
[2]Dipartimento di Scienze Geologiche, Università di Catania, Catania, Italy

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 kinematics of instability processes on eastern flank of Mt. Etna, a numerical simulation has been applied to a ...

Geothermal Water in Oil Reservoirs: A new 2D Model solved with COMSOL

M. C. Suarez-Arriaga1, F. Samaniego2, and J. Bundschuh3
1Faculty of Sciences, Michoacan University, Morelia, Mich., Mexico
2Faculty of Engineering, National University of Mexico, Morelia, Mich., Mexico
3Instituto Costarricense de Electricidad (ICE), Morelia, Mich., Mexico

We developed a new numerical model able to predict the critical oil rate for which oil-producing wells can be invaded by geothermal brine. The model is a single nonlinear partial differential equation (PDE) which depends only on water saturation. This PDE is a 3D-generalization of the classical 1D-Buckley-Leverett model. To solve this model, we used Lagrange-quadratic finite elements into the ...

Thermo-Hydro-Mechanical-Chemical Modelling of the Bentonite Barriers in Final Disposal of High Level Nuclear Waste

M. Olin, M. Tanhua-Tyrkkö, V. Pulkkanen, A. Itälä, K. Rasilainen, A. Seppälä, and M. Liukkonen
VTT Technical Research Centre of Finland, Nuclear Energy, Finland

The bentonite barrier is an essential part of safe nuclear waste repository in granite bedrock. In this work COMSOL Multiphysics® is applied to modeling Thermo-Hydro-Mechanical-Chemical (THMC) processes taking place in a bentonite buffer. The system is studied in different geometries, which consists of an overall 3D layout and a 2D cross-section of bentonite buffer and open fracture. ...

Computational Science and Engineering at DuPont

R. Nopper
Dupont Engineering
Research & Technology
Wilmington, DE

Rick has a BS in Physics, a ScM in Geological Sciences, and a PhD in Physics. He worked at Air Force Geophysics Laboratory, Conoco Petroleum Exploration Research, and, since 1989, has been at the DuPont Experimental Station. In this industrial setting, Rick has had opportunity to work on a great diversity of problems ranging from traditional engineering studies, using commercial finite-element ...

Intraplate Stress Analysis by COMSOL Multiphysics

G. Swetha, G. Pavankumar, and A. Manglik
National Geophysical Research Institute
Andhra Pradesh, India

Mathematical modeling tools are extensively used in Geosciences to delineate the earth structure at various spatial scales as well as to simulate coupled earth processes involving multiphysics concepts. COMSOL, a Multiphysics finite element method based numerical modeling package, can be used to analyze complex systems like earth where various physical parameters are involved and ...

Using COMSOL for Optimal Design of Engineering Barriers of Nuclear Waste Repositories

L.M. de Vries[1], A. Nardi[1], A.E. Idiart[1], P. Trinchero[1], J. Molinero[1], F. Vahlund[2], H. von Schenck[2]
[1]Amphos 21, Barcelona, Spain
[2]Swedish Nuclear Fuel and Waste Management, Stockholm, Sweden

The Swedish Nuclear Fuel and Waste Management Co (SKB) is responsible for final disposal of spent fuel and radioactive waste. SKB operates SFR, an underground waste repository in crystalline rock. The evolution of groundwater flow within the repository needs to be estimated considering different options for the design of the engineered barriers. The goal is to predict the effects of flow and ...

Viscoelastic Deformation of the Alaskan Crust and Upper Mantle Subsequent to Regional Earthquakes

Boyd, O.S.
U.S. Geological Survey, Golden, Colorado

Estimates of the probability of earthquakes in Alaska are improved through a finite element, viscoelastic analysis of the evolution of stress in the Earth’s crust and upper mantle. A solution to the problem is addressed through multiple FEMLAB applications, two for each subdomain, where each subdomain is a fault bounded block. The first application models the elastic response and sets up the ...

Erdwärmenutzung im Eisenbahntunnelbau – Simulation und Wirtschaftlichkeitsberechnung

Oberhauser, A.1, Adam, D.2
1 Wissenschaftlicher Mitarbeiter am Institut für Eisenbahnwesen, Verkehrswirtschaft und Seilbahnen, TU Wien, Wien
2 Ingenieurkonsulent für Bauingenieurwesen, Universitätsdozent am Institut für Grundbau und Bodenmechanik der TU Wien

The usage of geothermal heat by the means of railway infrastructure is a relatively new method to tap renewable energy sources. A research project at the Department of Railway Engineering, Transport Economics and Ropeways at Vienna University of Technology in cooperation with the Department of Soil Mechanics and Geotechnical Enginering and the Atlas Copco MAI Ltd. deals with the development of ...

Benchmark Calculations with COMSOL of the Transport of Radionuclides Through Clay and Bentonite Barriers in a Geological Repository

M.L. Sentís[1], F. Altorfer[1], M. Herfort[1], A. Jakob[2], G. Kosakowski[2], and S. Friedel[3]

[1]Swiss Federal Nuclear Safety Inspectorate, Villigen, Switzerland
[2]Paul Scherrer Institute, Villigen, Switzerland
[3]COMSOL Multiphysics GmbH, Zürich, Switzerland

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 radionuclides through clay and bentonite barriers in a geological repository for radioactive waste. In this study ...

Modeling Flow Through Foam Channels

F. Rouyer, E. Lorenceau, and O. Pitois
Laboratoire de Physique des Matériaux Divisés et des Interfaces, Université Paris-est, Paris, France

We model the liquid transport in foam (i.e. drainage) by unidirectional flow transverse to a triangular planar area that represents channel (i.e. Plateau borders) cross-sections. Partial mobility of the interfaces is obtained balancing the bulk viscous stress with the surface viscous stress and a velocity equal to zero is imposed at the vertices. In liquid foams, the wedges of the channels are ...

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