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 Effects of a Superparamagnetic Ground on the EMI Response of a Target - new

A. T. Clark[1]
[1]Research & Development, WM Robots LLC, Colmar, PA, USA

Soil’s electromagnetic properties adversely affect the performance of electromagnetic induction (EMI) sensors and if conditions are severe enough, render them useless. A simple circuit model is often used to express the electromagnetic induction response of a target analytically. This analytic model produces a response function that contains unique characteristics based on the target’s ...

Simple Disk Piezo Transformer Based Oscillator - new

J. P. Sandoz[1], J. M. Kissling[1]
[1]Institute of Applied Microtechnology, La Chaux-de-Fonds, HE‐ARC, Switzerland

In this contribution we present a COMSOL Multiphysics® example of a disk piezoelectric ceramic transformer (D-PT) coupled with a bipolar NPN transistor to form an auto-oscillator. The comparison between the simulations and the measurements made on our prototype are found to be in good agreement. Having at our disposal a large number of homogenously poled disks, we decided to build and to ...

Effects of Solvers on Finite Element Analysis in COMSOL Multiphysics® Software - new

C. Ravi[1]
[1]Siemens Technology and Services Private Limited, Bengaluru, Karnataka, India

Introduction: Solver section of FEA plays a very important role; it takes the input from the preprocessor and solves millions of equations using numerical methods. Capability of any analysis tools can be measured based on the solver. Understanding the nature and operation of various structural solid mechanics solvers is the interest of the present study. Results: Contact pressure is ...

Multiple Solutions in the Theory of DC Glow Discharges

P. Almeida, and M. Benilov
Departamento de Física. Universidade da Madeira, Portugal

It was suggested long ago that a theoretical model of a near-cathode region in a DC glow discharge admits multiple steady-state solutions describing different modes of currrent transfer. Even the most simple self-consistent models should admit such multiple solutions. In the present work, these solutions have been calculated for the first time with COMSOL Multiphysics.

Analysis of Multiconductor Quasi-TEM Transmission Lines and Multimode Waveguides

S.M. Musa[1], M.N.O. Sadiku[1], and O.D. Momoh[2]
[1]Prairie View A&M University, Prairie View, TX, USA
[2]Indiana University-Purdue University, Fort Wayne, IN, USA

This paper presents an analysis approach of multicondcutor quasi-TEM lines transmission interconnect in a single dielectric region and multimode waveguides using the finite element method (FEM). FEM is especially suitable and effective for the computation of electromagnetic fields in strongly inhomogeneous media. We illustrate that FEM is suitable and effective as other methods for modeling of ...

Modeling of High Temperature Superconducting Tapes, Arrays and AC Cables Using COMSOL

O. Chevtchenko
Technical University of Delft, The Netherlands

In this paper we present a set of numerical models created with COMSOL Multiphysics. The set includes quantitative models of a superconducting tape operated at 77 Kelvin, carrying a transport current and exposed to external magnetic field; an array of such tapes and a triaxial high temperature superconducting cable. Similar models were created in the past. However, an advantage of our approach ...

Verification and Time Performance Analysis of COMSOL v3.5a for Solving the Electromagnetic Problem in a Superconductor Slab

J. Lloberas[1], J. López[1], E. Bartolomé[2], and X. Granados[3]
[1]Universitat Politècnica de Catalunya, Barcelona, Spain
[2]Escola Universitària Salesiana de Sarrià, Barcelona, Spain
[3]Institut de Ciència de Materials de Barcelona, Barcelona, Spain

Numerical analysis based on finite element method (FEM) represents a powerful approach to solve electromagnetic problems. For instance, FEM methods have been broadly used to calculate the critical state current distribution in high temperature superconductors of various geometries. In the near future, we intend to develop a tool in COMSOL v3.5a for the analysis of power applications, such as ...

Transient Analysis of an EMVD Using COMSOL Multiphysics

G.E. Stebner[1], C. Hartwig[1]
[1]Ostfalia University, IMEC, Wolfenbüttel, Germany

In this paper an EMVD (Electro-Mechanical Valve Drive) for combustion engines is redesigned to achieve a fail-safe behavior when power loss occurs. The AC/DC Module and the Moving Mesh interface of COMSOL Multiphysics 4.2 are used to build up a transient model. This model also includes the calculation of eddy currents.

Validation of Space Charge Laminar Flow in Diodes

M. Cavenago[1]
[1]INFN-LNL, Legnaro, Padova, Italy

The well known Pierce design of electron and ion diodes is the base of particle source extraction systems [1,2]. It was heavily studied up to 1960 with analog computing and it now offers us a known case against which to compare the precision of fluid and particle tracing codes. The ideal model assumes zero particle kinetic energy at cathode emission, which is well matched in many sources: the ...

Modeling a Resonant Near-Field Scanning Microwave Microscope (RNSMM) Probe - new

N. Smith[1], K. Lees[1], A. Gregory[1], R. Clarke[1]
[1]The National Physical Laboratory, Teddington, Middlesex, UK

The current drive to go beyond the state of the art in novel near field scanning microwave microscope (NSMM) metrology at the micro scale, to make them capable of traceable measurements on functional materials, has led to the development of a finite element model of the probe of a resonant near field scanning microwave microscope (RNSMM). The model has been validated against an analytical ...