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.

Electric Field Calculations for AC and DC Applications of Water Controlled Cable Termination - new

T. Karmokar[1], R. Pietsch[1]
[1]HIGHVOLT Prüftechnik Dresden GmbH, Dresden, Sachsen, Germany

The computation of electric field strength is the state-of-the-art technique for designing and optimizing High-Voltage (HV) equipment. In this research, the equipment under analysis is Cable Termination (CaTr) which is used to apply high-voltage (75 kV – 800 kV AC) on the cable to be tested (Figure 1). The CaTr is based on the principle of linear electric field control using deionised water with ...

Two- and Three-Dimensional Holey Phononic Crystals with Unit Cells of Resonators

Y.F. Wang[1][2], Y.S. Wang[1], L. Wang[2]
[1]Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing, China
[2]Department of Mechanical Engineering, Østfold University College, Halden, Norway

We show in this paper that by careful design of the geometry of the resonators, complete bandgap with relatively low center frequency can be obtained for 2D and 3D Phononic Crystals with resonators. The generation of the bandgap is due to the local resonance of the unit cell. Spring-mass and spring-pendulum models are developed to predict the boundaries of the complete bandgap. The predicted ...

Simulation of the Temperature Profile During Welding with COMSOL Multiphysics® Software Using Rosenthal's Approach - new

A. Lecoanet[1], D. G. Ivey[1], H. Henein[1]
[1]Department of Chemical & Materials Engineering, University of Alberta, Edmonton, AB, Canada

A 3D finite element analysis is carried out, using COMSOL® software, to reproduce the thermal profile obtained with Rosenthal’s equation. The implemented heat transfer equation has been modified as a means to approximate Rosenthal’s solution. An analysis of the differences between the simulation and Rosenthal’s solution, when the geometry of the domain and the source are changed, has been ...

Analysis of Hydrodynamic Plain Journal Bearing

Ravindra Mane[1], Sandeep soni[1]
[1]Department of Mechanical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India

This paper presents the 3D model of hydrodynamic plain journal bearing using COMSOL Multiphysics®. Using 3D Model, pressure distribution in plain journal bearing is obtained by steady state analysis of plain journal bearing. Generalized Reynolds equation is used for analyzing hydrodynamic journal bearing by COMSOL Multiphysics® as well as by analytical method by applying Sommerfeld boundary ...

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 ...

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 ...

Multiphysics Topology Optimization of Heat Transfer and Fluid Flow Systems

E. Dede[1]
[1]Toyota Research Institute of North America, Ann Arbor, Michigan, USA

This paper is focused on topology optimization of heat transfer and fluid flow systems for multiphysics objectives. Specifically, COMSOL Multiphysics software is coupled with a method of moving asymptotes optimizer in a custom COMSOL / MATLAB script. Various physical process including conduction, convection-diffusion, and Navier-Stokes flow are considered. To illustrate the method, a standard ...

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 ...

Modeling Metamaterials with a Time-Domain Perfectly Matched Layer Formulation

H. Assi [1], R. S. C. Cobbold [1],
[1] University of Toronto, Toronto, ON, Canada

INTRODUCTION: Perfectly matched layers (PML) have been widely used for simulating wave propagation in unbounded media to effectively avoid spurious wave reflections from the computational domain boundaries. Time-domain PML formulations, especially for elastic waves, usually use a complex system of first-order equations. Compact second-order time-domain formulations are particularly desired ...

Study of Stent Deformation and Stress Developed at Different Stent Deployment Pressures

K. Basu[1], P. Ghosh[2], A. Chanda[1]
[1]School of Bio Science and Engineering, Jadavpur University, Kolkata, West Bengal, India
[2]Jadavpur University, Kolkata, West Bengal, India

According to clinical reports, cardiovascular disease has become a major global healthcare problem. The deposition of fats, cholesterol etc. at the arterials walls causes thrombus formation leading to stenosis and arterial blockage. To tackle this, along with arterial bypass, the use of Cardiovascular Stent is considered promising and effective (in single vessel and bi vessel diseases). While ...