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.

Studying Target Erosion in Planar Sputtering Magnetrons Using a Discrete Model for Energetic Electrons

C. Feist[1], A. Plankensteiner[2], J. Winkler[2]
[1]CENUMERICS, Innsbruck, Austria
[2]PLANSEE SE, Reutte, Austria

A discrete model for the prediction of relative ion bombardment flux and target erosion in planar sputtering magnetrons is implemented in COMSOL Multiphysics®. Planar magnetrons are used within physical vapor deposition (PVD) processes to form thin film depositions on various types of substrates. The presented model portrays trajectories of energetic electrons within low pressure direct current ...

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 ...

Feed-forward/Feed-backward Mechanical Amplification in the Mouse Cochlea

J. Soons[1,2], C. Steele[2], S. Puria[2]
[1]Lab of Biomedical physics, University of Antwerp, Antwerp, Belgium
[2]Department of Mechanical Engineering, Stanford University, Stanford, USA

Sound vibrations are collected from the external environment by the eardrum and are guided to the basilar membrane in the cochlea. Pressure differences in the two scalae of the cochlea result in a traveling wave on the basilar membrane. The tiny displacements are detected by the deflection of thousands of hair cells, situated along this membrane. It is hypothesized that some 3/4 of these hair ...

Solid-Liquid Phase Change Simulation Applied to a Cylindrical Latent Heat Energy Storage System

D. Groulx[1], and W. Ogoh[1]

[1]Mechanical Engineering Department, Dalhousie University, Halifax, Nova Scotia, Canada

One way of storing thermal energy is through the use of latent heat energy storage systems. One such system, composed of a cylindrical container filled with paraffin wax, through which a copper pipe carrying hot water is inserted, is presented in this paper. It is shown that the physical processes encountered in the flow of water, the heat transfer by conduction and convection, and the phase ...

Dynamic Structural Modelling of Wind Turbines Using COMSOL Multiphysics

C. Van der Woude, and S. Narasimhan
University of Waterloo, Waterloo, ON, Canada

This paper presents a study of a wind turbine subjected to wind and seismic loading, carried out using COMSOL Multiphysics. The dynamic properties and response of wind turbine structures are of interest, as recent developments in wind energy have led to the design and construction of increasingly large and flexible turbine structures. A typical turbine structure model was created in ...

Beam Characteristics of Ultrasonic Transducers for Underwater Marine Use

G. McRobbie[1], P. Marin-Franch[2], and S. Cochrane[1]
[1] University of Paisley
[2] Piezo Composite Transducers, Ltd

This paper illustrates how finite element analysis with COMSOL Multiphysics can be used to simulate the mechanical and electrical characteristics of piezoelectric transducers. It also shows how beam transmit plots and performance measurements can be modeled by coupling between a piezo domain and a second domain governed by the wave equation.

Modeling Acoustic Interface Wave Dispersion Using COMSOL Multiphysics®

B. Goldsberry[1], M. Isakson[1]
[1]Applied Research Laboratories, The University of Texas at Austin, Austin, TX, USA

Measuring geoacoustic parameters of underwater sediments is important for accurate modeling of underwater acoustic propagation. While the density and compressional wave speeds can be directly measured in sediments, shear wave speeds are difficult to measure because they are highly attenuated. However, shear wave speeds can be indirectly determined through measurement of Scholte interface wave ...

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 ...

Design and Analysis of MEMS Gyroscope

L. Sujatha[1], B. Preethi[1]
[1]Rajalakshmi Engineering College, Chennai, India

MEMS gyroscope technology provides cost- effective method for improving directional estimation and overall accuracy in the navigation systems. This paper presents a tuning- fork gyroscope (TFG) [1] with a perforated proof mass. The perforated proof mass used in the design enables the reduction of the damping effect. This MEMS based gyroscope was designed using COMSOL Multiphysics 4.2a. This ...

Calculation of Cable Parameters for Different Cable Shapes 

H. Lorenzen[1], J. Timmerberg[1], and S. Mylvaganam[2]
[1]Department of Electrical Engineering, UAS OOW, Wilhelmshaven, Germany
[2]Department Technology/Engineering, Telemark University College, Porsgrunn, Norway

Efforts involving simulation of  transmission line networks necessitate the accurate values of the parameters of the lines. In this paper, as an attempt in estimating such parameters, the parameters of high voltage asymmetric power lines are calculated. In the process of estimation, the three phase equivalent circuit model is used. The resistance and inductance of such lines are dependent on ...

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