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.

Analysis of Electromagnetic Behavior of Permanent Magnetized Electrical Machines in Fault Modes

M. U. Hassan [1], R. Nilssen [1], A. Røkke [2],
[1] Department of Electrical Power Engineering, NTNU, Trondheim, Norway
[2] Rolls Royce Marine AS, Trondheim, Norway

The use of Permanent Magnet Synchronous Machines (PMSM) as shaft generators is not new in marine vessels propulsion drive trains. Due to risk of fires in stator windings by internal faults, DNV GL requires the shaft generator to be electrically dead without losing propulsion. This requires a need of a novel design for on shaft generator with the capability of flux weakening. In this paper, a ...

Experimental Investigations and Numerical Simulation of Electrothermally Actuated Micro-gripper

B. K. S. Kishor[1], T. Ramesh [1],
[1] NIT Trichy, Tiruchirappalli Tamil Nadu, India.

At the micron-level, thermal actuation exerts larger forces compared to the widely-used electrostatic actuation. To obtain large displacements at low voltage the principle of Electro Thermal actuation is used. It works on the principle of selective non-uniform Joule heating which results in thermal expansion due to constraints. The Microgripper presented here is studied and analyzed by carrying ...

Topographic Effects on Radio Magnetotelluric Simulations on Levees: Numerical Modeling for Future Comparison With Fields Results

R. Duval[1], C. Fauchard[1], R. Antoine[1]
[1]ERA23-IFSTTAR, Laboratoire des Ponts et Chaussées de Rouen, CETE-Normandie Centre, France

We study the topography influence of levees on the electric resistivity signal obtained with the Radio-Magnetotelluric method. Field measurements have been modeled with COMSOL, using the AC/DC and RF Modules. A levee situated in Orléans along the Loire river (France) has been considered in order to design a model tacking account of the skin depth and the incident wavelength, keeping a constant ...

Modeling the ELENA Electron Cooler with COMSOL Multiphysics® Software - new

G. Tranquille[1]
[1]CERN, Geneva, Switzerland

ELENA is a small cooler decelerator ring at CERN which will be built to increase substantially the number of usable antiprotons delivered to experiments for studies with antihydrogen and antiprotonic nuclei. COMSOL Multiphysics® software has been used to completely model the ELENA electron cooling device in 3D. We have taken advantage of the different physics-based modules of COMSOL ...

Traveling Plasma Wave Levitation of Objects Supported by Coanda Effect - new

R. Eisenschmid[1]
[1]OPTIMA pharma GmbH, Schwäbisch Hall, Germany

Electrostatically excited plasma waves can induce a “plasma wind” in the surrounding media or air. The lifted object has a shape of a flying saucer, just for better illustration. A travelling plasma wave propulsion requires a pre-ionized media around the surface and a travelling electrostatic field. A simplified plasma model was used to set up an EFD (electro fluid dynamic) approach into a ...

Multi-Layers Surface Coil Design: Geometry Optimization - new

S. Aissani[1], L. Guendouz[2]
[1]CRM2, Institut Jean Barriol, University of Lorraine, Vandoeuvre-lès-Nancy, France
[2]Mesures et architectures électroniques, University of Lorraine, Vandoeuvre-lès-Nancy, France

Nuclear Quadrupole Resonance (RQN) is a radio frequency (RF) spectroscopic technique that is used to detect quadrupole nuclei such as Nitrogen-14. NQR was found to be a good candidate for detecting narcotics, explosives and medicines [1]. However, due to its low sensitivity the use of NQR is still limited. One way to increase the sensitivity is to improve the RF coil by means of a better RF ...

Modeling of Lightning Direct Effects - Interaction of Continuing Current with Aluminum Skins

Y. Kostogorova-Beller[1], and R. Collins[2]
[1]National Institute for Aviation Research, Wichita, KS, USA
[2]Hawker Beechcraft Corporation, Wichita, KS, USA

An interaction of aluminum aircraft skins with a laboratory-simulated, low-level, long-duration, continuing current representative of a natural lightning flash was modeled with COMSOL Multiphysics. For the analysis of the lightning direct effects on aircraft, the external environment is represented by the idealized current components. Particularly Component C is used and is characteristic of ...

Numerical Optimization of Heating for High-Speed Rotating Cup by Means of Multiphysics Modeling and its Experimental Verification - new

K. Kyrgyzbaev[1], M. Willert-Porada[1], M. Terock[1]
[1]University of Bayreuth, Chair of Materials Processing, Bayreuth, Germany

The physics of rotating cups and disks is an important research subject in many areas of engineering. The rotating cup/disk has been employed in many industrial applications such as spin-coating of phosphor on television screens or photoresist films on silicon wafer, concentrating solutions by evaporation, centrifugal atomization of metal melts, and glass flakes production. In this work the ...

COMSOL在斜井和水平井阵列感应响应计算中的应用

仵杰 [1], 史盼盼 [1],
[1] 西安石油大学,西安,陕西,中国

斜井和水平井中阵列感应响应特性研究是测井数据正确解释的基础。在斜井和水平井中,井轨迹可能以任意角度进出水平地层,阵列感应测井响应计算是复杂的三维电磁场数值计算。基于 COMSOL Multiphysics® 软件的 AD/DC 模块开发完成斜井和水平井中的阵列感应响应三维数值计算方法。详细计算分析水平井和斜井中井位置、目的层厚、目的层电导率、围岩电导率以及目的层与围岩电导率对比度对阵列感应测井响应的影响。结果表明,水平井的阵列感应测井响应特性取决于层厚、电导率对比度、子阵列间距、仪器距层界面距离等多种因素。当层厚大于仪器分层厚度时,水平井响应与直井响应接近;当层厚小于仪器分层厚度时,水平井响应与直井明显不同,在仪器进出界面时,响应出现明显尖峰;给定层厚,与直井比较,短阵列差别小,长阵列差别大。斜井中,当倾角小于30º时,响应受倾角影响小。当倾角从 30º 到 80º 变化时 ...

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 ...