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.

COMSOL Multiphysics® Enhances Design Process at e2v technologies

Jan Przybyla
Technical Specialist, e2v technologies, England

Outline of presentation: We have seen a few of the diverse ways e2v has started to use COMSOL It is allowing us to view our processes in a different way Resulting in improvements It is enabling our engineers and scientists to examine the full application, not just the microwave or RF tube Resulting in: Complete product solution -with much added value Expected considerable growth in ...

Designing Polymer Thick Film Intracranial Electrodes for use in Intra-Operative MRI Setting.

G. Bonmassar[1], and A. Golby[2]
[1]AA. Martinos Center, Massachusetts General Hospital, Charlestown, Massachusetts, USA
[2]Department of Neurosurgery, Brigham and Women’s Hospital, Boston, Massachusetts, USA

A new type of MRI compatible intracranial electrode based on Polymer Thick Film (PTF) is presented and studied using COMSOL Multiphysics. The geometry considered was a two-dimensional cross section cut of 5 mm thick electrodes with 5 cm leads on top of a 2×10 cm slab representing Gelfilm, or the substrate. The resistive leads were compared with metallic leads to estimate the ...

High Coupling Factor Piezoelectric Materials for Bending Actuators: Analytical and Finite Elements Modeling Results

I.A. Ivan[1], M. Rakotondrabe[1], and N. Chaillet[1]
[1]FEMTO-ST Institute, University of Franche-Comte, Besançon, France

New giant piezoelectric factor materials such as PMN-PT and PZN-PT were researched during the last decade and are actually becoming commercially available. As they seem very attractive for actuator designs, we studied their potential in replacing PZT ceramics. In a first comparative approach, we tested a series of classic rectangular composite bimorph structures of different combinations of ...

Modelling of Thermally Induced Electrical Instabilities in Intestine using COMSOL Multiphysics®

A. Gizzi[1][3], C. Cherubini[1][2], S. Migliori[1][3], and S. Filippi[1][2]
[1]Nonlinear Physics and Mathematical Modeling Lab, Engineering Faculty, University Campus Bio-Medico, Roma, Italy
[2]International Center for Relativistic Astrophysics, University of Rome La Sapienza, Roma, Italy
[3]Alberto Sordi Foundation, Research Institute on Aging, Roma, Italy

Postoperative or paralytic Ileus (PI) is a temporary aftermath of major abdominal surgeries. PI prevents the passage of food throughout the lumen leading to bloating, distension, emesis and pain. A plausible mathematical model for this phenomenology physiologically fine tuned including thermal variations, is presented here. Using COMSOL Multiphysics the existing intestinal ionic model have been ...

Biosimulation of Normal Pressure Hydrocephalus Using COMSOL Multiphysics®

K. Shahim[1], J-M. Drezet[1], J-F. Molinari[2], S. Momjian[3], and R. Sinkus[4]

[1]LSMX, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
[2]LSMS, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
[3]University Hospitals of Geneva and University of Geneva, Switzerland
[4]Waves and Acoustics Laboratory, ESPCI, Paris, France

A numerical finite element model of one human brain is built in COMSOL in order to study a particular form of hydrocephalus, the so called Normal Pressure Hydrocephalus (NPH). The geometry of the ventricles and the skull is obtained by Magnetic Resonance Imaging (MRI) and imported in COMSOL Multiphysics. Form the mechanical point of view, the brain parenchyma is modeled as a porous medium fully ...

Structural Mechanics of Cooling Catheters

M. Pavelchak, J. Urcinas, and T. Merrill
Rowan University, Glassboro, NJ, USA

This paper describes the use of structural mechanics capabilities within COMSOL to explore new cooling catheter designs. Cooling catheters may be used to save ischemic tissue resulting from strokes or heart attacks. Typical guide catheters use metallic braiding to ensure torsional strength. Braiding, however, displaces space for flows and limits design options. To explore alternatives to ...

Uniformity Correction for Fluid Coating Head

W. Vetterling
ZINK Imaging, Bedford, MA, USA

Slot coating is a widely used commercial process for applying one or more thin layers to a substrate such as paper, fabric, film or other material. In many cases, a highly uniform thickness is required, where a coating head that has been corrected for use with a Newtonian fluid may not produce a uniform coating when used with non-Newtonian fluids. With a multiphysics calculation involving the ...

High Vacuum Gas Pumping and Boundary Coupling

M. Cavenago
INFN/LNL, Laboratori Nazionali di Legnaro, Legnaro, Italy

Many scientific instruments are based on high vacuum equipment with a gas pressure maintained in the order of 1 Pa or below. The gas flow in the low pressure limit, called the molecular flow regime, is a case of transport with zero viscosity. The ability to solve an integral equation on the boundary with finite elements methods allows us to find the gas densities and flows in the ...

Electrostatic Fluid Structure Interaction (EFSI) on the Huygens Experiment

R. Godard [1], J. de Boer[1], N. Ibrahim[2], and G. Molina-Cuberos[3]
[1]Royal Military College of Canada, Kingston, ON, Canada
[2]University of Toronto, Toronto, ON, Canada
[3]Campus Espinardo, Murcia, Spain

The Huygens Atmospheric Structure Instrument (HASI) was designed to characterize the physical properties of the lower atmosphere and surface of Titan, the planet-size moon of Saturn. The Relaxation Probe (RP) sensor on the Huygens probe, determined the electrical conductivity in the lower atmosphere of Titan, from 140 km to 40 km. It was suspected that at an altitude above 100km, the booms were ...

Thermally Induced-Noise Reduction Using an Electrostatic Force Feedback

H. Lee, and J.V. Clark
Purdue University, West Lafayette, IN, USA

In this paper we present a method to mitigate the effect of thermally-induced noise in Micro-Electro-Mechanical Systems (MEMS) through a force feedback circuit. Inherent noise-induced vibrations, which would be inconsiderable in macro scale, are considered as a limitation in micro- and nano- scale since it diminishes the high performance of MEMS devices. For instance, depending on the stiffness ...

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