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.

The Electrical Impedance Image Reconstruction Using COMSOL MULTIPHYSICS

Kuo-Sheng Cheng[1]
[1]Department of Biomedical Engineering, Institute of Oral Medicine, National Cheng Kung University, Tainan, Taiwan

Electrical impedance tomography is a non-invasive, low-cost medical imaging technique that can be used long term without radiation hazards. We built a model of the torso, and then used COMSOL Multiphysics® to simulate applied current patterns, compute voltages, and find equi-potential lines. We used a filter backprojection algorithm to find the internal resistivity distribution. The results ...

Simulating Organogenesis in COMSOL Multiphysics®: Cell-based Signaling Models

D. Iber[1], J. Vollmer[1], D. Menshykau[1]
[1]Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland

Most models of biological pattern formation are simulated on continuous domains even though cells are discrete objects that provide internal boundaries to the diffusion of regulatory components. In our previous papers on simulating organogenesis in COMSOL Multiphysics® (Germann et al COMSOL Multiphysics® Conf Procedings 2011; Menshykau and Iber, COMSOL Multiphysics® Conf Proceedings 2012) we ...

3D-Modeling of Magnetophoretic Separation of Superparamagnetic Dispersions Using COMSOL Multiphysics® Particle Tracing Module

D. Kleinehanding[1], L. Teich[1], C. Schröder[1]
[1]Department of Engineering Sciences and Mathematics, Computational Materials Science & Engineering (CMSE), University of Applied Sciences Bielefeld, Bielefeld, Germany

Magnetophoresis is a process of great interest for novel applications based on magnetic nanoparticles and colloids. Environmental applications like wastewater treatments and pollutant removal, biomedical applications like protein isolation, drug delivery, magnetic hyperthermia for cancer treatment, and magnetic-particle imaging are just a few of the numerous technological areas which exploit the ...

External Field Induced Flow Patterns in Microscale Multiphase Flows

D. Bandyopadhyay[1], A. Sharma[1], S. Timung[1], V. Tiwari[1], T. K. Mandal[1]
[1]Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India

The study of multiphase flows inside the microfluidic devices has received much attention recently because of its applications in heat and mass transfer, mixing, microreaction, emulsification and most importantly in MEMS and lab-on-a-chip. We study the influence of an electric field on the interfacial morphologies and their transitions, the phenomenon termed electrohydrodynamics. The literature ...

Improvement of the Reflective Characteristic of the Microwave Ion Source Chamber with COMSOL®

[1]Hirohiko MURATA

Sumitomo Heavy Industries, Ltd., Shinagawa, Tokyo, Japan[1]

We, Sumitomo Heavy Industries, Ltd. have been developing a microwave ion source since 2011. The design of the chamber is important to generate plasma efficiently. The plasma chamber was designed with the COMSOL Multiphysics RF module, and reported the results at this conference last year. In order to improve the reflective characteristic further, we redesigned the plasma chamber with the RF ...

COMSOL Multiphysics® Models Combined with Experiments to Teach PID Controller Tuning

W. Clark[1]
[1]Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, MA, USA

A laboratory exercise to learn PID controller tuning can be time consuming and taxing on the equipment. A purely equation-based, virtual controller tuning exercise might not seem relevant to real world processes. We have combined a physical process with a COMSOL Multiphysics model to teach the practical aspects of PID controller tuning. Students ran simulated experiments with COMSOL to test ...

Heat Propagation Improvement in YBCO-Coated Conductors for Superconducting Fault Current Limiters - new

D. M. Djokic[1], L. Antognazza[1], M. Abplanalp[2], M. Decroux[1]
[1]DPMC, University of Geneva, Geneva, Switzerland
[2]ABB Corporate Research Centre, Dättwil, Switzerland

YBCO Coated Conductors (CCs), used for applications in Resistive Superconducting Fault Current Limiters (RSFCLs), are known to have insufficiently high Normal Zone Propagation Velocity (NZPV) during quench events. The improvement can be made by enhancing the thermal conductivity of YBCO-CCs with no decrease in the electrical resistivity. We studied the advantage of multilayered structures grown ...

The Simulation of Motion of a Slider upon a Stator Due to Frictional Force Using COMSOL Multiphysics® Software - new

H. B. Nemade[1]
[1]Indian Institute of Technology Guwahati, Guwahati, Assam, India

The Surface Acoustic Wave (SAW) linear motor was studied which is developed utilizing the friction principle for driving. The principle says that, when a slider is placed on the Rayleigh waves generated on a stator, the slider moves in reverse direction of the wave due to friction between the stator and the slider. A LiNbO3 piezoelectric substrate is used as a stator where comb structured Al ...

Multiphysics Model for Breakup of Charged Liquid Droplets in Electric Fields

S. Chaudhuri [1], W. Du [1],
[1] University of Illinois at Urbana-Champaign, Champaign, IL, USA

Predicting and controlling the formation of droplets from a liquid jet is a critical problem in a variety of applications ranging from fuel injection to paint sprays. It is known that liquid droplets subjected to an electric field acquire a net electrostatic charge via induction, and that the magnitude of this charge depends on the conductivity of the liquid and the size of the droplet [1]. When ...

Marine Vibrator Bubble Source Simulation and Testing

A. K. Morozov [1],
[1] Teledyne Marine Systems, North Falmouth, MA, USA

Marine Vibrators are a coherent type of sound source, which can be quieter and less harmful for marine habitants than traditional air-gun technology. Such source gives clearer, more precise and higher resolution imaging of the bottom properties due to the coherent signal and streamer array processing. Teledyne Marine Systems is developing a coherent seismic marine sound source technology ...

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