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.

Increasing the Robustness of a Linear Transduction Pressure Sensor for Post-Processing Assembly

A. Dhawan[1], F. Li[1], A.G. Akingba[2], and J.V. Clark[1]

[1]Purdue University, West Lafayette, IN, USA
[2]Indiana University, Indianapolis, IN, USA

In this paper we numerically explore design variations to increase the resistance to rotation of our novel large-deflection, linear-transduction pressure sensor to increase its expected yield for post-processing assembly and misalignment. During post processing assembly, a diaphragm is anodically bonded to the base which contains comb drives. Once the diaphragm is in contact with the comb drive, ...

Exploring the Design Space of Electro Thermal Actuators

W. Hodges, and J.V. Clark
Purdue University, West Lafayette, IN, USA

In this paper we explore the design space of several configurations of electro thermal actuators (ETA) through COMSOL. A unique attribute of ETA is their ability to produce a large and stable actuation force using any semi-conductive material. Comparisons between ETAs are lacking. Without adequate comparisons, it is difficult for designers to readily decide which type and geometry of ETAs might ...

Ionic Current Through Carbon Nanotubes

J.H. Park, and P. Krstic
Oak Ridge National Laboratory, Oak Ridge, TN, USA

Ionic current through an electrolyte filling a carbon nanotube (CNT) is characterized by unusually high current values, due to the strong slip of the fluid at the inner surface of the nanotube, as well as of a dominating role of electro-osmotic component. Using COMSOL, we explore the fundamental features of this phenomenon with respect to the CNT length and excess charge inside the tube. COMSOL ...

Multiphysics Modeling of Magnetorheological Dampers

D. Case, B. Taheri, and E. Richer
Southern Methodist University
Dallas, TX

A magnetorheological fluid consists of a suspension of microscopic magnetizable particles in a non-magnetic carrier medium. When a magnetic field is produced in the same space, the microscopic particles suspended in the fluid become oriented and form chains along the magnetic flux lines, changing the fluid’s rheology. This project uses COMSOL Multiphysics to examine the magnetic flux lines ...

COMSOL Multiphysics Predictions of Pressurized CO2 Foil Thrust Bearing Characteristics

T. Munroe
Bechtel Marine Propulsion Corporation
Niskayuna, NY

This report discusses an analysis of gas foil thrust bearings used in the Integrated Systems Test (IST) turbomachinery. Gas foil thrust bearing failures occurred in IST turbomachinery during operational testing at Barber-Nichols Inc. This paper presents preliminary results of a study to assess, by means of multiphysics analyses, the performance characteristics of the foil thrust bearing over ...

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