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.

Optimization Of The Collection Of Sprays By An Enhanced Electronic Sensor

J. Berges[1], B. Barelaud[1], I. Niort[2], and J.L. Decossas[2]
[1]XLIM, Limoges, France
[2]Université de Limoges, France

We propose the study of an electronic sensor allowing the collection of sprays in free space. The detector consists of three elements: a photodiode situated in the center of the structure to which is applied a bias voltage, an aluminum ring which referenced to a voltage higher than that of the photodiode and an insulating material disk (polyvinyl chloride). The total size of the structure is ...

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 ...

FEM Based Modeling In COMSOL Multiphysics and Design Of Control Of Distributed Parameter Systems

C. Belavý, and G. Hulkó, and K. Ondrejkovic, and D. Šišmišová
Slovak University of Technology in Bratislava, Bratislava, Slovakia

This paper presents a finite element method based modeling and design of control for distributed parameter systems. First, models of distributed parameter systems in the form of lumped-input/distributed-output systems and structure of control loop are introduced. Next, modeling of temperature fields of the casting die as distributed parameter systems in preheating process is performed in COMSOL ...

Model of an Interdigitated Microsensor to Detect and Quantify Cells Flowing in a Test Chamber

E. Bianchi[1], F. Boschetti[1], G. Dubini[1], and C. Guiducci[2]
[1]Politecnico di Milano, LABS, Laboratory of Biological Structure Mechanics, Structural Engineering Department, MI, Italy
[2]CLSE - Swiss Up Chair -Laboratory of Life Science Electronics, EPFL, Losanna, Swissland

Microfabricated planar interdigitated electrodes can detect and analyze cells or particles giving an impedance-based characterization. This method presents several advantages: real-time detection, label-free analysis, non-invasive sensing, easiness of integration and high-throughput screening. A numerical model of an interdigitated planar micro sensor was realized in order to optimize and pre ...

Study of Gas Dynamics in the Heat-accumulation Stoves

P. Scotton, and D. Rossi
Dipartimento di geoscienze
Università di Padova
Padova, Italy

The paper aims to clarify some aspects of the gases hydro-dynamics within the twisted conduct of heat accumulation stoves (ceramic-refractory stoves) downstream the combustion chamber. Both Comsol laminar and k-e turbulent models have been used in case of straight and curved pipes with circular, square and rectangular cross-sections, at different Reynolds numbers, in case of smooth wall (Comsol ...

Modeling Arterial Drug Transport From Drug-eluting Stents: Effect of Blood Flow on the Concentration Distribution Close to the Endothelial Surface

F. Bozsak, J.-M. Chomaz, and A. I. Barakat
LadHyX, Ecole Polytechnique
Palaiseau, France

Drug-eluting stents (DES) are commonly used for treating coronary atherosclerosis. Despite the broad effectiveness of DES, ~5% of treated patients experience complications including in-stent restenosis and late-stent thrombosis. Furthermore, drugs used in DES not only inhibit proliferation of smooth muscle cells but also affect re-endothelialization. We have developed a computational model ...

Multiphysics Simulation of an Anode-supported Micro-tubular Solid Oxide Fuel Cell (SOFC)

G. Ganzer, W. Beckert, T. Pfeifer, and A. Michaelis
Fraunhofer IKTS
Dresden, Germany

The high thermal stability and fast start-up behavior make micro-tubular solid oxide fuel cells (SOFCs) a promising alternative for small-scale, mobile power devices in the range of some Watts. To understand the transport phenomena inside a single micro-tubular SOFC, a 2-D, axi-symmetric, non-isothermal model, performed in COMSOL Multiphysics® 4.2, has been developed. Due to long current path ...

Numerical Experiments for Thermally-induced Bending of Nematic Elastomers with Hybrid Alignment

L. Teresi[1], and A. DeSimone[2]
[1]LaMS - Modeling & Simulation Lab, University Roma Tre, Roma, Italy
[2]SISSA - International School for Advanced Studies, Trieste, Italy

We deal with Liquid Crystal Elastomers (LCEs) having hybrid alignment (HNEs), that is, fabricated with a given non-homogeneous nematic orientation. For such a materials, permanent distortions induced by deswelling can be compensated by those resulting from cooling below the transition temperature, thus yielding the possibility of producing temperature-driven actuators. Here, we simulate the ...

High Field Magnetic Diffusion into Nonlinear Ferrimagnetic Materials

J-W. Braxton Bragg[1], J. Dickens[1], A. Neuber[1], and K. Long[2]
[1]Center for Pulsed Power and Power Electronics, Texas Tech University, Lubbock, TX
[2]Dept. of Mathematics, Texas Tech University, Lubbock, TX

Ferrimagnetic based, coaxial nonlinear transmission lines (NLTLs) provide a means to generate sub-nanosecond risetime pulses (from nano-second input pulses) or megawatt level high power microwave oscillations, depending on the geometry, material, and external bias fields. This investigation uses the commercially available, finite element solver COMSOL to provide insight into pulse behavior. ...

Microwave Drying of Cellular Ceramic Substrates: A Conjugate Modeling Approach to Understand Surface Moisture Migration

A. Halder, and J. George
Corning, Inc.
Painted Post, NY

Microwave drying processes are critical components in the manufacture of cellular ceramic substrates and filters. The objective of this study is to develop a comprehensive model at a small scale and include all the possible physics that are important during microwave drying processes. Based on the results, conclusions are made on the importance of different factors in drying.

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