Technical Papers and Presentations

Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

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 ...

Seawater Intrusion

Bird, J., Bonneton, A., Brouat, V., Panfilova, I.
Ecole Nationale Supérieure de Géologie, Institut National Polytechnique de Lorraine

Seawater intrusion is a significant practical problem for coastal regions, which requires human efforts directed to prevent the degradation of freshwater aquifers. In the present paper we examined the homogeneous confined aquifer in terms of a 2D model which represents a vertical cross-section perpendicular to the sea coast. Several numerical simulations were performed in order to determine the ...

Nearwell Bore Pressure Transient Simulation with Geomechanical Deformation for Formation Evaluation in Weak Reservoirs

Lee, H.J., Torres-Verdín, C., Sepehrnoori, K.
The University of Texas at Austin

Geomechanics is valuable to account the rock deformations due to pore pressure and temperature changes resulting from production and fluid injection. We have used the FEMLAB 3.1 earth science module’s coupled geomechanical-fluid flow model to test its application to near wellbore pressure transient analysis. The new feature in FEMLAB 3.1 enables to couple geomechanical and fluid flow models ...

Using COMSOL for the Transport Modelling of Some Special Cases in a Bentonite Buffer in a Final Repository for Spent Nuclear Fuel

M. Olin[1], V-M. Pulkkanen[1], A. Seppälä[1], T. Saario[1], A. Itälä[1], M. Tanhua-Tyrkkö[1], and M. Liukkonen[1]

[1]VTT, Technical Research Centre of Finland, Espoo, Finland

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 interest lies in systems in which the density of bentonite or bentonite pore water varies. Typically, variation ...

Relevance of Hydro-Mechanical-Chemical Processes Involved in the Construction and Operation of Copper Heap Leach Pads

M. Tincopa[1], A. Nardi[2], G. Roman-Ross[2] , J. Molinero[2]
[1]Technic University of Catalonia (UPC), Barcelona, Spain
[2]Amphos 21 Consulting, Barcelona, Spain

Heap leaching in the mining industry had become a sophisticated practice at least 500 years ago. It is a mineral processing technology whereby piles of crushed Run-of–Mine rock are leached with chemical solutions to extract minerals. The goal of this work is to contribute to the understanding of the behavior of a heap leach pad by using coupled Hydro-Mechanical-Chemical simulations. COMSOL ...

FEMLAB® Performance on 2D Porous Media Variable Density Benchmarks

Holzbecher, E.
Humboldt Universität Berlin, IGB, Berlin, GERMANY

Variable density problems are suitable test-cases for multi-physics codes, as the interaction between flow and transport processes is a characteristic of the observed phenomena. This contribution focuses on density-driven flow benchmarks in porous media. Here FEMLAB® results are shown for the Henry model concerning stationary saltwater intrusion, and the Elder heat convection experiment in a ...

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 Hydro-Mechanical Analysis of Excavation Damaged Zones around an Underground Opening in Sedimentary Rock

H. Abdi[1], E. Evgin[1], M. Fall[1], T.S. Nguyen[2], and G. Su[2]
[1]University of Ottawa, Ottawa, ON, Canada
[2]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 ...

Intraplate Stress Analysis by COMSOL Multiphysics

G. Swetha, G. Pavankumar, and A. Manglik
National Geophysical Research Institute
Hyderabad
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 ...

Application of Numerical Simulation in Geotechnical Engineering

Dr. Meen-Wah Gui[1]
[1]Department of Civil Engineering, National Taipei University of Technology, Taipei, Taiwan

In this work, COMSOL Multiphysics was used to develop a model to investigate the degree of saturation in sloped terrain. The model was validated via laboratory experiments incorporating Lan’s man-made rainfall slope model test. The validated model was used in an actual case study to simulate the Maokong Landslide.

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