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.

Computation of Capacitance, Inductance, and Potential Distribution of Integrated-Circuit Interconnects for Unshielded Four Conductors with Three Levels Systems

S.M. Musa[1], M.N.O. Sadiku[1], J.D. Oliver[1]
[1]Prairie View A&M University, Prairie View, TX, USA

In this paper an attempt has been made to design and analyze integrated circuit interconnects for unshielded four conductors with three levels system using Finite Element Method (FEM). The computational and simulation work has been carried out with help of COMSOL Multiphysics software. We illustrate that FEM is as accurate and effective for modeling multilayered multiconductor transmission ...

Establishing Absorbed Dose Thresholds for Nonlinearities in Water Calorimetry

R.E. Tosh[1], H. Chen-Mayer[1]
[1]National Institute of Standards and Technology, Gaithersburg, MD, USA

The technique of water calorimetry for primary-standard dosimetry of radiotherapy-level ionizing radiation is well established at national metrology institutes around the world, where such a direct realization of absorbed dose establishes the basis for calibrating instruments used for dosimetry in medical settings. The typical calorimeter system uses miniature thermistor beads to measure ...

SWRO (Desalination) Biofilm Remediation Technology Utilizing Centrifugal Micro-Fluids

E.M. Glenn[1]
[1]University of California, Irvine, CA, USA

Water-and-energy supply is a global issue of paramount importance. The demand for safe potable water is quickly exceeding the limits of natural regional water resources. Like oil, water is a finite resource; unlike oil, however, water has no alternatives. Water, energy and their environmentally sound solutions are interrelated; and of all the present-day environmental problems, those related to ...

Multiphase Transport with Large Deformations Undergoing Rubbery-Glassy Phase Transition: Applications to Drying

T. Gulati[1], A. Datta[1]
[1]Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA

Drying of biomaterials such as foodstuffs involves mass, momentum and energy transport along with large shrinkage of the porous material, which have significant effects on their final quality. Foodstuffs exhibit non-linearity when undergoing large deformations that affect the transport process in a critical way. Thus, it becomes important to perform a two-way coupling of the multiphase transport ...

Finite Element Analysis of Induced Electroosmotic Flow in Brain Tissue and Application to ex vivo Determination of Enzyme Activity

Y. Ou[1], A. Rupert[1], M. Sandberg[2], S. Weber[1]
[1]University of Pittsburgh, Pittsburgh, PA, USA
[2]University of Gothenburg, Gothenburg, Sweden

Ectopeptidases are commonly accepted to be a means of clearing active peptides. However, studies have shown that they can also regulate peptide activity. We have developed a technique of electrokinetic push-pull perfusion (Ek-PPP, Figure 1) to examine this largely unexplored mechanism of modulation of peptide function. We push the neuropeptide galanin through organotypic hippocampal slice ...

Thermal Analysis of Packaged Deep Ultraviolet LEDs

A. Dobrinsky[1], M. Shatalov[1], M. Shur[1], R. Gaska[1]
[1]Sensor Electronic Technology, Columbia, SC, USA

Deep Ultraviolet Light Emitting Diodes (DUV LEDs) are presently operating at a relatively low efficiency, thus large amount of LED driving power is dissipating in heat. Thermal heating degrades LED performance and decreases LED’s lifetime. The degradation of DUV LED devices with temperature increase makes thermal management a key issue for DUV LEDs. We present a thermal analysis of DUV LED ...

Electromagnetic Release Process for Flexible Electronics

G. Coryell[1][,][2]
[1]School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, USA
[2]Chemistry Department, United States Naval Academy, Annapolis, MD, USA

Flexible electronics are temporarily affixed to a rigid carrier such as glass or silicon prior to device fabrication to facilitate robotic handling of the device, but also to allow optical lithography to stay within overlay design registration budget; without the rigid carrier, a freestanding flexible substrate such as polyimide would distort unacceptably during even minor temperature excursions ...

Numerical Modeling of Pit Growth in Microstructure

S. Qidwai[1], N. Kota[2], V. DeGiorgi[1]
[1]Naval Research Laboratory, Washington, DC, USA
[2]Science Applications International Corporation, Washington, DC, USA

Pitting corrosion is a complex phenomenon where rates of: i) chemical reactions, ii) diffusion of various species involve in those reactions, and iii) species dissolution at the metal-electrolyte interface are fully dependent on each other, except under special conditions or assumptions. One set of such conditions is that: a) there are no species concentration gradients due to the rapid mixing ...

Wireless RF Digital System for Mouth-Embedded Multi-Sensor Communication

I.M. Abdel-Motaleb[1], J. Lavrencik [1]
[1]Department of Electrical Engineering, Northern Illinois University, DeKalb, IL, USA

There is urgent need to monitor dental and oral diseases, such as tooth decay, gum diseases, and teeth grinding. Such monitoring can be achieved by embedding sensors in the mouth. This technique faces some difficulties. The first is how the power needed for the operation of the sensors and the associated electronic chips can be generated. This power can be generated using the pressure exerted by ...

Development of the Service Frame for SBS Tracker GEM and TENDIGEM Development

F. Noto[1], E. Cisbani[2], F. Librizzi[1], F. Mammoliti[3], C.M. Sutera[1]
[1]Istituto Nazionale Fisica Nucleare - Sezione di Catania, Catania, Italy; Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy
[2]Istituto Nazionale Fisica Nucleare - Sezione di Roma, Roma, Italy; Istituto Superiore di Sanità, Roma, Italy
[3]Istituto Nazionale Fisica Nucleare - Sezione di Catania, Catania, Italy; Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy

The Gas Electron Multiplier (GEM) technology has been proven to tolerate rate larger than 50 MHz/cm² without noticeable aging and to provide the sub-millimeter resolution on working chambers up to 45x45 cm² [1]. A new GEM tracker is under development for the upgrade of the SBS spectrometer in Hall A at Jefferson Lab. The chambers of the tracker have been designed in a modular way: each chamber ...