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 News Magazine 2017

A Study of Thermo-Fluid Behavior in Tubular Metal Hydride Beds in the Hydriding Process

S. Makridis[1], E.I. Gkanas[1], A. Ioannidou[2], E.S. Kikkinides[2], A.K. Stubos[3]
[1]Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece & Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR “Demokritos”, Athens, Greece
[2]Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece
[3]Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR “Demokritos”, Athens, Greece

Hydrogen, the most abundant element in the universe, has great potential as an energy source, and can be generated from renewable energy sources. We used COMSOL for the solution of the energy, mass and momentum balance equations that describe the hydrogen absorption and desorption procedure in the metal hydride compressor. Thermodynamic or engineering properties like the reaction enthalpy ??, ...

Model of a Microfluidic Thermal Cycler Activated by Means of Electro-Osmotic Micro-Pumps

E. Bianchi[1][2], M.F. Bello[1], I. Critelli[1], G. Dubini[1]
[1]Politecnico di Milano, LaBS, Laboratory of Biological Structure Mechanics, Milano, Italy
[2]Swiss Federal Institute of Technology (EPFL), Laboratory of Life Sciences Electronics - Swiss Up Chair, Lausanne, Switzerland

A microfluidic thermal cycler for Polymerase Chain Reaction (PCR) has been modeled. A microliter sample is driven along the microchannel by a flow generated by means of electroosmotic micropumps, activated in sequence. Several multichannel pumps configurations have been separately modeled and the efficiency of each device has been evaluated with regard to the effective flowrate and the back ...

Drug Distribution in the Human Eye

L. Murtomäki[1], T. Kainuvaara[1]
[1]University of Helsinki, Helsinki, Finland

Drug therapy of the posterior segment of an eye is very challenging due to the difficult accessibility. Modern drugs often are large molecules, such as peptides, antibodies or oligonucleotides which are administrated, e.g. by intravitreous injections which requires clinical conditions. Computer modeling can be helpful in designing new and less invasive routes of drug administration. COMSOL is ...

Photon Migration Through Multiple Layers of Biological Tissue

M.S. Yeoman[1], E. Sultan[2]
[1]Continuum Blue, Tredomen, Ystrad Mynach, United Kingdom
[2]College of Technological Studies, PAAET, Adailiyah, Kuwait

The modeling of light propagation through multiple layers of biological tissue are assessed & compared to the theoretical predictions by Perelman at al. [94 & 95] of the most-favorable-path (MFP). The MFP on which photons will be found can be obtained from the path of the net flux propagation using the diffusion equation. The diffusion equation is valid when studying diffuse light propagation, ...

Analysis of Fluid Pumping with a Throttle Type Piezoelectric Micro Pump

B. Pe?ar[1], D. Križaj[1], D. Vrta?nik[1], D. Resnik[1], U. Aljan?i?[1], M. Možek[1], T. Dolžan[1], A. Slavko[1]
[1]Faculty of Electrical Engineering, UNI of Ljubljana, Ljubljana, Slovenia

Operation of a modified type microthrottle (MT) pump is analyzed by numerical simulation. Conventional MT pumps have disk type piezoelectric membranes while the analyzed type has a membrane of a rectangular shape. This could be advantageous in case the pump is stacked into an array for parallel pumping. A complete electro–fluid–solid mechanics coupling model for numerical simulation of strip ...

Design Variability of a MEMS Resonator

H. van Halewijn[1], J. Beek[2]
[1]Physixfactor, Nijmegen, The Netherlands
[2]NXP, Eindhoven, The Netherlands

It is important in designing micro-electromechanical systems (MEMS) to reduce the variability of design parameters caused by manufacturing tolerances and material properties. At NXP COMSOL has been used to investigate many aspects of the design, such as the Q-factor, anchor losses, thermal behavior, parasitic capacitance of the resonator and more. Quartz crystal resonators are used in many ...

Thermo-Mechanical Analysis of Composite Material Exposed to Fire

A. Davidy[1]
[1]IMI, Ramat Hasharon, Israel

This paper presents thermo-mechanical models for predicting the strength of polymer laminates loaded in tension or compression exposed to one-sided radiant heating by fire. The first part is the fire simulation where the FDS model is utilized. The FDS model generates a solution of several state variables, such as pressure, temperature, heat, velocity vector. In the second part, COMSOL heat ...

3D Simulation of Air-Glass Heat Exchange in a Set of Vials

G. Mongatti[1], A. Borelli[1]
[1]Marchesini Group, Pianoro, Italy

In this model a three-dimensional heat transfer analysis was performed by using COMSOL Multiphysics\' Heat Transfer Module. The model is about the heating of a set of vials (Figure 1) in a current of hot air in the laminar regime. We used time dependent studies to predict the thermal behavior of the glass and to estimate the temperatures in the various points of the bottles at various times. ...

A Model of Electric Field Assisted Capillarity for the Fabrication of Hollow Microstructures

C. Tonry[1], M. K. Patel[1], C. Bailey[1], M. P.Y. Desmuliez[2], W. Yu[3]
[1]Computational Mechanics and Reliability Group (CMRG), School of Computing and Mathematical Sciences, University of Greenwich, London, United Kingdom
[2]Microsystems Engineering Centre (MISCEC, School of Engineering & Physical Sciences, Heriot Watt University, Earl Mountbatten Building, Edinburgh, United Kingdom
[3]State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin, China

Electric Field Assisted Capillarity (EFAC) is a novel technique for the fabrication of hollow polymer microstructures. It has advantages over current methods as it is a single step process. Hollow microstructures have many uses in industry from microchannels and microcapsules in BioMEMS to fibre-optical waveguides. It makes use of the dielectric properties of polymers combined with a heavily ...

Thermal and Fluid Dynamics Studies Applied to Steel Industry

G. Tracanelli[1], M. Culos[1]
[1]Studio di Ingegneria Industriale Tracanelli, San Vito al Tagliamento, Italy

The energy pay back is one of the most interesting field especially in the steel industry where this contribution is strictly connected to steams and emissions inside and outside the plant. Perhaps, this application is sometimes disturbed by a strong variation of emissions (\"off gas\"). One example is the arc furnace where the process is very discontinuous and there are many fluctuations in the ...