Artigos Técnicos e Apresentações

Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Underground Coal Fire Extinction Model Using Coupled Reactive Heat and Mass Transfer Model in Porous Media

S. Suhendra[1], M. Schmidt[1], and U. Krause[1]
[1]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 ...

Sensor Modeling for an Electrical Capacitance Tomography System Applied to Oil Industry

Flores, N., Gamio, J.C., Ortiz-Alemán, C., Damián, E.
Instituto Mexicano del Petróleo, México, D.F., México

Multiphase flow characterization is an important task for monitoring, measuring or controlling industrial processes. This can be done by means of process tomography. One category of process tomography, is electrical capacitance tomography (ECT), where the cross section to be imaged is surrounded by a set of capacitance electrodes formed from simple metal plates. This paper presents the ...

FEMLAB Modeling of Multiple Crack Systems

Grechka, V.1, Kachanov, M.2
1 Shell E & P, Houston, TX
2 Department of Mechanical Engineering, Tufts University, Medford, MA

Almost ubiquitous presence of fractures in the earth and their tendency to provide natural pathways for flow of hydrocarbons makes them an important target in exploration for oil and gas. While typical geophysical (mainly seismic) data indicate only relatively large faults, information about many small fractures of exploration interest has to be inferred from seismics by applying some effective ...

3-D Multiphysics Modeling of a Producing Hydrocarbon Field

McKenna, J.R.1, Blackwell, D.D.2
1 U.S. Army Engineer Research & Development Center, Geotechnical & Structures Laboratory, Vicksburg, Mississippi
2 Department of Geological Sciences, Southern Methodist University, Dallas, Texas

Thermal anomalies indicating elevated temperatures often are present in producing hydrocarbon fields. This paper discusses precision temperature logs obtained over a salt dome in the Bayou Bleu hydrocarbon field in southwest Lousiana, and presents a 3-D thermal-fluid model of the dome constrained by these types of logs. The numerical model in which both an enhanced thermal conductivity ...

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 ...

Coupled Models of Lithospheric Flexure and Magma Chamber Pressurization at Large Volcanoes on Venus

G. Galgana[1], P. McGovern[2], and E. Grosfils[2]

[1]Lunar and Planetary Institute, Houston, Texas, USA
[2]Pomona College, Claremont, California, USA

We present an implementation of the Structural Mechanics module of COMSOL Multiphysics to model the state of stress associated with the emplacement of large volcanic edifices on the surface of a planet. These finite element models capture two essential physical processes: (1) Elastic flexure of the lithosphere beneath the edifice load, and (2) Pressurization of a magma-filled chamber that serves ...

COMSOL Multiphysics, TOUGHREACT and Numerrin Comparison in Some Modelling Tasks of Spent Nuclear Fuel Disposal

A. Itälä[1], V-M. Pulkkanen[1], M. Laitinen[2], M. Tanhua-Tyrkkö[1], and M. Olin[1]
[1]VTT Technical Research Centre of Finland, Espoo, Finland
[2]Numerola Oy, Jyväskylä, Finland

Bentonite clay is used as a protecting barrier around both the copper capsules in deposition holes and in deposition tunnels in the KBS-3 final disposal concept for spent nuclear fuel. The performance of these bentonite barriers will be investigated both experimentally and by modelling. Both approaches are needed, because for example the time span in question (hundred thousand years or even more) ...

Constraints on Ocean Floor Permeability from Hydrothermal Modelling

S. Titarenko[1], A. McCaig[1]
[1]School of Earth and Environment, University of Leeds, Leeds, UK

The Atlantis massif is a domal submarine seamount close to the mid-Atlantic Ridge at 30 °N. Close to the crest of the Massif, the Lost City hydrothermal field (LCHF) has been active for at least 120,000 years, venting fluids with a temperature of 40-90 °C. 5 km north of Lost City, a temperature profile has been measured in IODP Hole 1309D, with a near-conductive thermal gradient of ~100 °C/km ...

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 ...

Modeling Soil Water Dynamics with Time-Variable Soil Hydraulic Properties

A. Schwen[1], G. Bodner[2], A. Schnepf[3], D. Leitner[3], G. Kammerer[1], and W. Loiskandl[1]

[1]Institute of Hydraulics and Rural Water Management, Univ. Natural Resour. Appl. Life Sci., BOKU, Wien, Austria
[2]Institute of Agronomy and Plant Breeding, Univ. Natural Resour. Appl. Life Sci., BOKU, Wien, Austria
[3]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 ...

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