L. P. Aoki, H. E. Schulz, M. G. Maunsell
University of São Paulo, São Carlos, SP, Brazil
This article considers a closed water circuit with square cross section filled with an electrolyte fluid. The conductor fluid was moved using an electromagnetic pump, in which a permanent magnet generates a magnetic field and electrodes generate the electric field in the flow. Thus, the movement is a consequence of the magnetohydrodynamic (or MHD) effect. The model adopted here was derived from ...
S. Satti, M. Baghini
Indian Institute of Technology Bombay, Mumbai, Maharashtra, India
As a part of a lab-on-chip-device, more often it is required to measure dielectric constant of the fluid. For this purpose it is necessary to develop a sensor whose size is compatible with microfluidic channel. The work, presented in this paper, studies effect of the parameters influencing sensitivity of such a sensor and ultimately optimizes these dimensions to maximize the sensitivity. We ...
M. Dong, M. Tomes, M. Eichenfield, M. Jarrahi, T. Carmon
University of Michigan, Ann Arbor, MI, USA
Sandia National Laboratories, Albuquerque, NM, USA
We present a 3D port sweep method in a lossy silicon photonic crystal resonator to demonstrate the capabilities of COMSOL Multiphysics® for frequency domain analysis with input and output ports. This method benefits from the advantages of the S-parameter analysis to characterize the input and output coupling into the resonator. By pumping one end of the cavity with a CW plane wave, we are able ...
Modeling and Simulation of High Permittivity Core-Shell Ferroelectric Polymers for Energy Storage Solutions
N. Badi, R. Mekala
University of Houston, Houston, TX, USA
The dielectric properties of ferroelectric PVDF polymer embedded core-shell (Al-Al2o3) nanoparticle is simulated using COMSOL Multiphysics® software. Significant increase in electrical permittivity of the composite at percolation threshold (K = 2800) is achieved when compared to electrical permittivity of bare polymer (K = 12). Both Maxwell Garnett and Symmetric Bruggeman models gave an ...
E. Baur, M. Sabathil, and N. Linder
Osram Opto Semiconductors GmbH, Regensburg, Germany
For a proper design shaping of light emitting diodes, the exact knowledge of the current distribution in the active area is essential. On the one hand, one has to achieve a uniform current density over the chip area, on the other hand, one has to avoid current crowding in the neighborhood of the electrical contacts. In this paper it is shown first how a LED can be modeled by COMSOL Multiphysics. ...
Comparing Isotropic and Anisotropic Brain Conductivity Modeling: Planning Optimal Depth-Electrode Placement in White Matter for Direct Stimulation Therapy in an Epileptic Circuit
L. C. Zaragoza, B. Hondorp, M. A. Rossi
ITESM, Monterrey, Mexico
Rush Medical College, Chicago, IL, USA
Rush University Medical Center, Chicago, IL, USA
The goal of our work was to calculate a patient-specific brain conductivity map for predicting the extent to which direct stimulation therapy can strategically propagate through pathological white matter. Our laboratory developed isotropic and anisotropic human brain finite element method (FEM) models derived from SPGR magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI), ...
O. Vogel, and J. Ulm
Proportional solenoids are well-known and used in a wide range of applications today. This paper is about methods of influencing the characteristic force-stroke-curves of magnetic actuators by means of different pole geometries. The conical design of the stator pole which is mostly used to accomplish proportional solenoids is analyzed by both a simple analytic reluctance model and a FEM model ...
G. Zhang, Y. Zhao, J. Hodge, J. Brcka, J. Faguet, E. Lee
Clemson University, Clemson, SC, USA
TEL U.S. Holdings, Inc., U.S. Technology Development Center, Austin, TX, USA
In using DEP for particle manipulation, researchers often use a formula to calculate the DEP forces in which the forces are proportional to the particle radius to the third power. This formula assumes that the electrical field, E, will not be affected by the presence of a particle, no matter what the actual size and the dielectric property of the particle are. This work confirms that the ...
T. Andersen, M. A. E. Andersen, O. C. Thomsen
DTU Elektro, Technical University of Denmark, Kgs. Lyngby, Denmark
In this work COMSOL is utilized to obtain the Mason lumped parameter model for a piezoelectric transformer (PT) design. The Mason lumped parameters are relevant in the design process of power converters. The magnitude of the impedance is simulated for a specific interleaved multilayer thickness mode PT. The PT design has been prototyped and the measurements results are compared with simulations. ...
P.A. Wallace, M. Alsharif, D.M. Hepburn, and C. Zhou
Department of Energy Systems Engineering, Glasgow Caledonian University, Glasgow, United Kingdom
Two simulations of the performance of a Paper Insulated Lead Covered (PILC) Medium Voltage (MV) underground cable are presented. The first presents the thermal response of a cable, over seven days, to a realistic load with a diurnal variation. The second concentrates on the variation of the electric field stress within the cable over a single AC cycle. The effects of a void defect within the ...