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.

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 ...

Homogeneous and Inhomogeneous Model for Flow and Heat Transfer in Porous Materials as High Temperature Solar Air Receivers

O. Smirnova, T. Fend, P. Schwaryboezl, and D. Schoellgen
German Aerospace Center, Institute of Technical Thermodynamics, Koeln, Germany

Results of simulations on flow and heat transfer in a porous Silicon Carbide honeycomb structure applied as a solar air receiver are presented. In this application porous materials are put in concentrated solar radiation. Flux densities of up to 1000 MW/m² are reached. Simultanously, ambient air flows through the material to be heated up to temperatures of app. 800°C. This hot air is then used ...

Stress Distribution in Masonry Walls, Loaded in Plane, Simulated with COMSOL

A.T. Vermeltfoort, and J. van Schijndel
Eindhoven University of Technology, the Netherlands

The tensile strength of masonry is relatively low compared to its compressive strength and is affected by the direction of the joints and their filling. In masonry with modern thin layer mortar (joint thickness 3 to 5 mm) sometimes the head joints are left open. A total of 13 model-walls was built and for each model four general purpose mortar combinations and three thin layer mortar combinations ...

Numerical Simulation Of Laminar Flow Above And Below Triangular Bedforms

C. Gualtieri
University of Napoli Federico II, Naples, Italy

This paper presents some results of numerical simulations carried out to investigate the basic hydrodynamic interactions between the laminar flow in the water column above triangular bedforms and the Darcian flow in the underlying permeable sediments. The flow was described by the Navier-Stokes equation in the free region and the Darcy equation in the porous region. Numerical simulations were ...

Mechanical Behaviour of TiAl Spherical Particles Including Friction Effect

G. Maizza, R. Cagliero, and A. Santoro
Dipartimento di Scienza dei Materiali ed Ingegneria Chimica, Politecnico di Torino, Torino, Italy

Powder metallurgy is a key technology for manufacturing advanced components based on TiAl alloys. Cold compaction is the primary step to produce green parts. Cold deformation of TiAl powder is difficult due to its typical poor ductility. Plastic deformation and cracking susceptibility of TiAl powder strongly depends on micro-mechanical phenomena. To manage real compaction problems more reliable ...

Using Computational Fluid Dynamics Model to Predict Changes in Velocity properties in Stented Carotid Artery

S. Vaidehi, and A. Ritter
Stevens Institute of Technolgy, Hoboken, NJ, USA

Atherosclerosis is a disease that narrows, thickens, hardens and restructures a blood vessel due to substantial plaque deposit. In the Carotid Artery, the decision to treat using endarterectomy and stenting is determined by the velocity as measured by Doppler flow in the common Carotid Artery. The measured Doppler velocity as compared with the contra-lateral side has been correlated with the ...

Drift of Space Charge Produced by Glow Corona During Thunderstorms

M. Becerra
ABB Corporate Research, Power Technologies, Electrical Apparatus and Diagnostics group, Västerås, Sweden

Glow corona discharges are generated from tall objects during thunderstorms previous to a lightning strike. These discharges generate space charge which can hinder the development of subsequent discharges. In order to quantify the shielding effect of positive glow corona, a transient, two dimensional model of the drift of the space charge generated on the tip of tall objects under the ...

Computational Building Physics using Comsol: Research, Education and Practice

J. van Schijndel
Eindhoven University of Technology,
Eindhoven, The Netherlands

Jos van Schijndel completed his MSc in 1998 at the Department of Applied Physics at the Eindhoven University of Technology (TUe). In 2007 he obtained a PhD degree at the TUe on integrated heat, air and moisture modeling. Currently, he is assistant professor focusing on Computational Building Physics. His passion is creative computational modeling using state of art scientific software and ...

Benchmark of COMSOL vs. ROXIE Codes for the Calculation of a Particle Accelerator Quadrupole

I. Rodriguez, and J. L. Munoz
ESS Bilbao
Bilbao, Spain

The field quality requirements of most particle accelerator magnets are very tight and, therefore, very precise simulations are needed to accurately calculate these devices. CERN\'s ROXIE code is widely used as a reference software to calculate normal conducting and superconducting magnets for particle accelerator applications. ROXIE uses the full vector potential coupled to the BEM-FEM method ...

Magnetic Nanoparticles for Novel Granular Spintronic Devices

A. Regtmeier[1], A. Weddemann[2], I. Ennen[3], and A. Hütten[1]
[1]Dept. of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, Bielefeld, Germany
[2]Dept. of Elect. Eng. and Comp. Science, Lab. for Electromagnetic and Electronic Syst., MIT, Cambridge, MA
[3]Institute of Solid State Physics, Vienna University of Technology, Vienna, Austria

Superparamagnetic nanoparticles have a wide range of applications in modern electric devices. Recent developments have identi fied them as components for a new type of magnetoresistance sensor. We propose a model for the numeric evaluation of the sensor properties. Based on the solutions of the Landau-Lifshitz-Gilbert equation for a set of homogeneously magnetized spheres arranged in highly ...

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