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.

Application for Ultrasensitive Biosensing by Nanodevise

[1]Takatoki YAMAMOTO

Tokyo Institute of Technology, Yokohama, Kanagawa, Japan[1]

It is possible to obtain novel functions using nano-scaled structures and related physics that are impossible to be realized by conventional macro-scale technology. Thus, we are trying to understand the physics dominated by nanostructure and to develop the biosensing applications. Here, we exploit the interaction between materials and electrostatic field created by nanostructure, and introduce ...

Modeling of Directional Dependence in Nanowire Flow Sensor

A. Piyadasa[1,3], P. Gao[1,2,3]
[1]Department of Physics, University of Connecticut, Storrs, CT, USA
[2]Department of Materials Science & Engineering, University of Connecticut, Storrs, CT, USA
[3]Institute of Materials Sciences, University of Connecticut, Storrs, CT, USA

3D finite element analysis model has been constructed for testing the directional dependence in a novel form of nanowire array gas flow sensor. Single nanowire (p-type single crystal Silicon) model is developed using fluid structure interaction and piezoresistivity components in the MEMS Module for COMSOL Multiphysics® software. Change in resistivity tensor due to induced stress in the nanowire ...

Optimization Module Enables Hybrid Experimental-Numerical Algorithm for 3D Particle Image Velocimetry

M. Sigurdson[1], C. Meinhart[1], I. Mezic[1]
[1]Department of Mechanical Engineering, University of California - Santa Barbara, Santa Barbara, CA, USA

In our study of chaotic mixing, 3D velocity measurements (u,v,w) are required for evaluation of a micro mixer using a mix-prediction algorithm. The hybrid approach presented here combines 2D measurements, an imperfect numerical model, and appropriate fitting parameters. Because our purpose is a measurement, rather than development of a physically accurate and predictive model, it not necessary ...

Heterodimensional Charge-Carrier Confinement in Sub-Monolayer InAs in GaAs

S. Harrison[1], M. Young[1], M. Hayne[1], P. D. Hodgson[1], R. J. Young[1], A. Strittmatter[2], A. Lenz[2], U. W. Pohl[2], D. Bimberg[2]
[1]Department of Physics, Lancaster University, Lancaster, UK
[2]Institut für Festkörperphysik, Berlin, Germany

Low-dimensional semiconductor nanostructures, in which charge carriers are confined in a number of spatial dimensions, are the focus of much solid-state physics research, offering superior optical and electronic properties over their bulk counterparts. Both two-dimensional (2D) and zero-dimensional (0D) structures have seen wide-ranging applications in laser diodes, solar cells and LEDs to name ...

Optimization of Jet Mixer Geometry and Mixing Studies

A. Egedy[1], B. Molnar[1], T. Varga[1], T. Chován[1]
[1]Department of Process Engineering, University of Pannonia, Veszprém, Hungary

The primary aim of using jet as mixer, like in case of other mixing devices, is to increase the heat and mass transfer between the phases. Beside the injection position the geometry of the jet mixer and the injection nozzle has a major effect on the injection. In our study COMSOL Multiphysics software was used to carry out the experimental and simulation of the different jet geometries. The jet ...

Performance Evaluation of the 19th Century Clipper Ship Cutty Sark: A Comparative Study

C. Tonry[1], M. Patel[1], C. Bailey[1], W. Davies[1], J. Harrap[1], E. Kentley[1], P. Mason[1]
[1]University of Greenwich, London, UK

The Cutty Sark, built in 1869 in Dumbarton, is the last intact composite tea clipper ship [1]. One of the last tea clippers built she took part in the tea races back from China. These races caught the public imagination of the day and were widely reported in newspapers [2]. They developed from a desire for ‘fresh’ tea and the first ship to return with the new season’s tea could charge a ...

Powder Densification Modeling of the Spark-Plasma-Sintering Process

C. Maniere[1], C. Estournes[2], L. Durand[3], G. Chevallier[1], K. Afanga[1]
[1]Institute Carnot CIRIMAT, Toulouse, France
[2]University Paul-Sabatier, Toulouse, France
[3]CEMES, Toulouse, Toulouse, France

The Spark Plasma Sintering is a breakthrough way of elaboration of more or less complex shape materials from powder. This process allows the sintering of materials in few minutes compare to hours by conventional sintering. One of the main goals of the SPS modeling is to be able to predict the densification of the powder during the process. In COMSOL Multiphysics® it is possible to implement ...

Rheological and Topographical Controls on Deformation Due to a Shallow Magma Reservoir

J. H. Johnson[1]
[1]University of Bristol School of Earth Sciences, Bristol, UK

The use of high-resolution topography in the finite element model demonstrates that deformation from a shallow pressure source can be dramatically affected by overlying relief, not only in magnitude, but also in azimuth. This result is significant as it allows traditionally anomalous data to be evenly weighted during inversions for magma reservoir parameters. The result that surface ...

Numerical Analysis of Mass Transfer Rate in Droplet Flow at Microscopic Scales

S. Cito[1], T. Sikanen[1]
[1]Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland

Droplet flow at microscopic scale is often used to enhance many pharmaceuticals and industrial processes (i.e. liquid–liquid micro-extraction, nanoparticle synthesis, slow reactions in microfluidic devices, etc.). In all these processes, the mass transfer rate, at the interface between the droplets and the surrounding fluid of diluted reactants plays a key role. This work at analyzing ...

Inverse Method for Calculating the Temperature-Dependent Thermal Conductivity of Nuclear Materials

T. Pavlov[1,2], P. Van Uffelen[1], L. Vlahovic[1], D. Staicu[1], M. Wenman[2], R. W. Grimes[2], ,
[1]Institute for Transuranium Elements, Eggenstein-Leopoldshafen, Germany
[2]Department of Materials, Imperial College London, London, UK

The high temperature measurement of thermal conductivity is vital for predicting nuclear fuel performance both during reactor operation and accident conditions. The proposed method uses experimental thermograms obtained via high temperature laser-flash heating of a disc-shaped sample in combination with finite element analysis and parameter optimization to calculate the thermal conductivity of ...

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