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.

Comparison Between Phase Field and ALE Methods to Model the Keyhole Digging During Spot Laser Welding

V. Bruyere[1], C. Touvrey[1], P. Namy[2]
[1]CEA-DAM, Is-sur-Tille, France
[2]SIMTEC, Grenoble, France

Nowadays, spot laser welding is a full-fledged part of industrial manufacturing and is routinely used due to its advantages. It generates very located temperature gradients, and therefore, induces small distortions in the pieces. The COMSOL Multiphysics® software is used to model the interaction stage of an isolated impact made with a Nd:YAG pulsed laser. The free surface evolution has been ...

Multiphysics Simulation of Thermoelectric Systems - Modeling of Peltier-Cooling and Thermoelectric Generation

M. Jaegle
Fraunhofer-Institute for Physical Measurement-Techniques (IPM), Freiburg, Germany

Electro-thermal interaction is commonly considered only as a matter of joule heating. In addition, the Seebeck-, Peltier- and Thompson-Effects are significant in materials with high thermoelectric figure of merit Z. These thermoelectric materials have a high Seebeck-coefficient α, a good electric conductivity σ, and a poor thermal conductivity λ. They have widespread areas of ...

Lamb Waves and Dispersion Curves in Plates and It’s Applications in NDE Experiences Using Comsol Multiphysics

P. Gómez, J. P. Fernandez, and P. D. García
Hydro-Geophysics & NDE Modeling Unit
University of Oviedo
Mieres, Spain

In this paper, a model for numerically obtaining lamb wave modes and dispersion curves in plates is presented. It is shown that COMSOL Multiphysics can be employed to simulate the behavior of guided waves in dispersive plates, which is useful for NDE applications. A two dimensional steel plate (4x0.1 meters) is excited with a space-time impact point source. To model the point source, we use ...

High Curvature Bending of Ultra-Thin Chips and Chip-on-Foil Assemblies

D. van den Ende[1]
[1]Holst Centre / TNO, Eindhoven, The Netherlands

Ultra-thin chips of less than 20µm become flexible, allowing integration of silicon IC technology with highly flexible electronics. This combination allows for highly intelligent products of unprecedented thinness, flexibility and cost. Examples include sensor systems integrated into food packaging or healthcare and sport monitoring tags as wearable patches or even directly in clothing textile ...

Classical Models of the Interface Between an Electrode and an Electrolyte

E. Gongadze[1], S. Petersen[1], U. Beck[2], and U. van Rienen[1]
[1]Institute of General Electrical Engineering, University of Rostock, Rostock, Germany
[2]Institute of Electronic Appliances and Circuits, University of Rostock,
Rostock, Germany

The Electrical Double Layer (EDL) plays a major role in understanding the interface between a charged surface (e.g. an implant) and ionic liquids (e.g. body fluids). The three classical models of the EDL (Helmholtz, Gouy, and Chapman-Stern) are numerically solved for a flat surface electrode in the 3D Electrostatics application mode of COMSOL Multiphysics® 3.5a. The values of the electric ...

Residence Time Distribution for Tubular Reactors - new

L. R. de Souza Jr.[1], L. Lorenz[1]
[1]Universidade Federal do Paraná, Curitiba, Paraná, Brazil

In the core of Chemical Engineering is the reactor design that includes most of all scientific disciplines. The reactors, in general, are treated ideally. Unfortunately, it is observed in the real world a very different behavior from that expected. Thus, to characterize nonideal reactors is used, among others, residence time distribution function E(t). The aim of this present work is to ...

3D Electromagnetic Field Simulation in Microwave Ovens: A Tool to Control Thermal Runaway

T. Santos[1], L.C. Costa[1,2], M. Valente[1,2], J. Monteiro[1,2], and J. Sousa[3]
[1]University of Aveiro, Portugal
[2]I3N, Aveiro, Portugal
[3]TEKA Portugal S.A., Ílhavo, Portugal

In microwave heating applications, the energy is introduced directly into the volume of the material and as consequence the quality of the process is highly dependent on the uniformity of the electromagnetic field distribution along it. That is, the non uniformity of the heating is a potential problem with serious consequences. Thermal runaway is the most critical, in materials with temperature ...

Tunable MEMS Capacitor for RF Applications

H. S. Shriram[1], T. Nimje[1], D. Vakharia[1]
[1]BITS Pilani, Rajasthan, India

Radio Frequency MEMS devices have emerged to overcome the problem of high losses associated with semiconductors at high frequencies. A tunable MEMS capacitor is a micrometre-scale electronic device whose capacitance is controlled through different actuation mechanisms which govern the moving parts. It can have electrostatic or electrothermal actuators depending on the functional complexity and ...

Heat Transfer and Phase Change Simulation in COMSOL Multiphysics® Software

N. Huc [1]
[1] COMSOL France, Grenoble, France

This session is devoted to phase change modeling in heat transfer simulations. The great interest in phase change comes from the outstanding thermal performance that it enables in particular for cooling or thermal protection applications. Alternatively, phase change can induce most of the energy cost in drying or cooking applications. In all of these cases, a thermal analysis is required to ...

Simulation and Design of an Oven for PET Blow Molding Machines

M. Mor[1], C. Seneci[1], V. Zacché[1], C. Remino[1], G. Petrogalli[1], D. Fausti[1]
[1]Polibrixia, Brescia, Italy

This paper presents the study and design of a new generation oven for PET blow-molding machines. The design faced several technical challenges such as: the temperature distribution in the critical areas, the sharp curvature radius, the high PET thermal inertia and the presence of boundary elements, which affected the overall performances. The work included an analysis of the preform material ...