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.

Building a Robust Numerical Model for Mass Transport Through Complex Porous Media

J. Perko[1], D. Mallants[1], E. Vermariën[2], and W. Cool[2]
[1]Belgian Nuclear Research Centre (SCK-CEN), Mol, Belgium
[2]Belgian Agency for Radioactive Waste and Enriched Fissile Material (ONDRAF/NIRAS), Mol, Belgium

Mass transport modelling through porous media is typically characterized by complex physics and geometry. In the particular case of radionuclide transport, modelling for radioactive waste repositories, an additional level of complexity, and thus uncertainty, originates from the long time frames involved. Performing a safety analysis of a radioactive waste disposal system requires therefore ...

Coupling COMSOL’s Subsurface Flow Module with Environmental Geochemistry in PHREEQC

L. Wissmeier[1], and D. A.Barry[2]
[1]GIT HydroS Consult GmbH, Freiburg, Germany
[2]EPFL, Lausanne, Switzerland

We present a software tool for simulations of subsurface flow and solute transport in combination with comprehensive intra-phase and inter-phase geochemistry. The software uses PHREEQC as a reaction engine to COMSOL Multiphysics®. The coupling with PHREEQC gives major advantages over COMSOL’s built-in reaction capabilities, i.e., the soil solution is speciated from its element composition ...

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 ...

The Effect of Different Geometries on the Thermal Mantle Convection

M. Herein, and A. Galsa
Department of Geophysics
Eötvös University
Budapest, Hungary

For the numerical solving of the equations, Comsol has been applied. Simulations have been modeled in 2D Cartesian, in cylindrical coordinate system and in a “mantle-like” cylindrical-shell. Mantle dynamics is controlled by the Rayleigh number (Ra), which is the ratio of the buoyancy and viscous force. The effect of Ra has been studied in the range of 1e4 to 1e7. The significance of the ...

Simulation of Incompressible Flow through Rhombohedric Pores

R. Viola[1][3], F. Zama[2], M.Tuller[3], and E. Mesini[1]

[1]DICMA, University of Bologna, Bologna, Italy
[2]Dep. of Mathematics, University of Bologna, Bologna, Italy
[3]Dep. of Soil, Water, and Environmental Science, University of Arizona, Arizona, USA

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 approach based on Darcy’s law. To test the capabilities of the COMSOL Multiphysics modeling platform, we ...

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 ...

Effect of S-p Relation Model on DNAPL Migration Simulation Result

H. Ishimori[1], and K. Endo[1]
[1]National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan

To consider effective counter measures against ground water contaminated with dense non-aqueous phase liquids (DNAPLs) such as chlorinated solvents, it is first important to understand the mechanism of their migration in heterogeneous aquifer. In addition, numerical analysis models to simulate such a complex migration in heterogeneous aquifer are required. The displacement pressure, which is ...

Modelling of Transport Phenomena and Effect of Applied Electrical Field on Heavy Metals Recovery during Application of the Electro-remediation Process

A. Mahmoud, and J. Beaugrand
Laboratoire de Thermique Energétique et Procédés, ENSGTI, Pau, France

A mathematical model for the simulation of contaminant such as heavy metals removal from soils by electric fields was performed in a 2-D geometry using COMSOL Multiphysics. Electrokinetic phenomena is the result of the coupling between hydraulic and electrical potential gradients in fine grained soils. The model describes the coupled transport of mass and charge of species subjected to an ...

Transport in reactive porous media containing biofilms

G. Debenest, Y. Aspa, and M. Quintard
IMFT, GEMP group, Toulouse, France

The objective of this presentation is the evaluation of effective bulk transport properties of reactive porous biofilm. We present our microscale model that accounts for both momentum and mass balances.

COMSOL Modeling of a Submarine Geothermal Chimney

M. Suárez [1], and F. Samaniego [2]
[1]Faculty of Sciences, Michoacán University (UMSNH), Morelia, Michoacan, Mexico
[2]Faculty of Engineering Postgrade Studies Division, National University of Mexico (UNAM), Mexico City, Mexico

New geothermal energy sources hold promise for the future. Deep submarine geothermal energy related to hydrothermal vents is emerging in many places along the oceanic spreading centers. Shallow submarine geothermal systems are found near to continental platforms. We present the initial development of mathematical models to simulate the energy transport in submarine systems. A model for the ...

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