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.

Study & Modeling of 'Acoustic Matching Layers' for Ultrasound Imaging Probes Through Pulse-Echo FEM Simulation - new

L. Spicci[1]
[1]Esaote SpA, Florence, Italy

Ultrasound Imaging probes are specific devices that require a very detailed design of acoustic impedance match for the stack of layers that form the probe head (1,3). These are typically made of silicone rubber, special epoxy resins, polyurethanes and, of course, piezoelectric materials. The acoustic impedance, measured in Rayls, have to be matched similarly to an electric circuit (2), from a ...

Understanding the Magnetic Field Penetration in Mesoscopic Superconductors via COMSOL Multiphysics® Software - new

I. G. de Oliveira[1]
[1]Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil

Introduction: One of the main characteristic of the superconductors is its diamagnetic response of applied magnetic fields. The superconductors refuse the penetration of magnetic field into its interior, it is the well know Meissner effect, B=0 into the superconductor sample. However when the applied field reach a determined value, the magnetic field can enter. There are two different ways of ...

Coupled Magnetic-Structural Finite Element Analysis

S. V. Kulkarni[1], and S. Alapati[1]
[1] Department of Electrical Engineering, Indian Institute of Technology Bombay, Maharashtra, India

In general, there is a wide range of applications requiring coupled electromagneticstructural analysis. In this paper, two of such coupled problems have been analyzed. The first one is a transient analysis of Electromagnetic Forming process and the other problem is a deformation analysis of a coil in a static electromagnetic field. These problems are simulated in COMSOL using AC/DC module and ...

Modelling of Micro/Macro Densification Phenomena of Cu Powder during Capacitor Discharge Sintering

G. Maizza[1] and A. Tassinari[1]

[1]Dipartimento di Scienza dei Materiali ed Ingegneria Chimica, Politecnico di Torino, Torino, Italy

Capacitor Discharge Sintering (CDS) is an ultrafast Electric Current Assisted Sintering method (u-ECAS) suited for electrically conductive powders. It is characterized by relatively short processing times (milliseconds range) and much lower sintering temperatures than the melting point of the powders. However, the CDS basic phenomena are not fully understood yet neither at the macroscale nor at ...

Thermo-Mechanically Coupled Analysis of Shape Memory ActuatorsNC

Q. Li, and S. Seelecke
Department of Mechanical & Aerospace Engineering, North Carolina State University, Raleigh, NC, USA

This presentation deals with a Thermomechanical coupled analysis of a Shape Memory wire actuator. The outline for the Shape Memory Alloy model is:Motivation - Multiple scales and materialsMicro-scale mechanismsMeso-scale lattice elementsMacro-scale elementFree energy conceptUnified approach to various active materials(SMA, PZT, FSMA, etc.)Mathematical modelStatistical thermodynamicsThermally ...

High Frequency Magnetohydrodynamic Calculations in COMSOL

N. Kleinknecht, and S. A. Halvorsen
Teknova AS
Kristiansand, Norway

In many metallurgical processes metals are (heated and) stirred by an oscillating external magnetic field. The magnetic field induces electric currents in the metal and the currents interact with the magnetic field to create a force, the Lorentz force. For high frequencies induction only takes place in an electromagnetic boundary layer due to the skin effect and the force is confined within this ...

Optimization of a Multiphysic Device – A Comparison of a Finite-Element- and a Equation-based Simulation

M. Jungwirth, and B. Hansbauer
University of Applied Sciences
Wels, Austria

To avoid overheating and malfunction of an electrical system it is necessary to optimize the power-loss of each component. The power dissipation mostly depends on multiple physical effects and therefore optimization is not an easy task. In this paper we focus on the reduction of complexity employing a equation-based simulation and compare it with a Finite-Element (FE) simulation in the ...

Expanding Your Materials Horizons

R. Pryor[1]
[1]Pryor Knowledge Systems, Inc. (COMSOL Certified Consultant), Bloomfield Hills, Michigan, USA

Materials and their related properties are intrinsically fundamental to the creation, development and solution of viable exploratory models when using numerical analysis software. In many cases, simply determining the location, availability and relative accuracy of the necessary material parameters for the physical behavior of even commonly employed design materials can be very difficult and time ...

Application of Multiphysics in the Simulation of Metallurgical Processes

M. Ek, and D. Sichen
Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden

In the steelmaking processes, the stirring of the metal bath by argon (or nitrogen) injection is a widely used method to achieve chemical or thermal homogeneity. Computational fluid dynamics can be used as a very powerful tool to gain an insight into the mass transfer and heat transfer in liquid steel. In this paper, the flow behaviors in two different steelmaking reactors were simulated using ...

Ferromagnetic Materials for MEMS- and NEMS-Devices

A. Weddemann, J. Jadidian, S. Khushrushahi, Y. Kim, and M. Zahn
Research Laboratory of Electronics
Massachusetts Institute of Technology
Cambridge MA

The modeling of ferromagnetic materials is a challenging task of high industrial and academic impact. Thin film and granular systems form the basis of novel spintronic devices such as modern hard drives with a high data area storage density. In order to push the current limits even further and to design more efficient devices, a strong understanding of the governing dynamics is required. We ...

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