In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.
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Heterodimensional Charge-Carrier Confinement in Sub-Monolayer InAs in GaAs - new

S. Harrison[1], M. Young[1], M. Hayne[1], P. D. Hodgson[1], R. J. Young[1], A. Strittmatter[2], A. Lenz[2], U. W. Pohl[2], D. Bimberg[2]
[1]Department of Physics, Lancaster University, Lancaster, UK
[2]Institut für Festkörperphysik, Berlin, Germany

Low-dimensional semiconductor nanostructures, in which charge carriers are confined in a number of spatial dimensions, are the focus of much solid-state physics research, offering superior optical and electronic properties over their bulk counterparts. Both two-dimensional (2D) and zero-dimensional (0D) structures have seen wide-ranging applications in laser diodes, solar cells and LEDs to name ...

FEM Modeling in Robust Design for Graphene-Based Electromagnetic Shielding

S. Elia [1], G. Granata [1], P. Lamberti [1], V. Tucci [1],
[1] University Of Salerno, Italy

Electromagnetic shielding design is usually approached referring to nominal values of the main parameters. This could lead to malfunctioning devices and its performance differ widely from what was really aimed at or, worse, the final design product could even be physically unrealizable. This work presents a robust approach to the design of EM Shielding based on Graphene (Gph) layers. It is a two ...

Design and Simulation of MEMS Based Gyroscope for Vestibular Prosthesis

R. Nithya[1], K. Kavitha[1], R. K. Shahana[1], A. Gupta[1], M. Alagappan[1]
[1]Department of Biomedical Engineering, PSG College of Technology, Coimbatore, Tamilnadu, India

The primary function of the vestibular system is to provide the brain with information about the body\'s motion and orientation. The absence of this information causes blurred vision and spatial disorientation, vertigo, dizziness, imbalance, nausea, vomiting, and other symptoms often characterize dysfunction of the vestibular system. Our aim is to design vestibular prosthesis using COMSOL ...

Thickness Optimization of a Piezoelectric Converter for Energy Harvesting

M. Guizzetti[1], V. Ferrari[1], D. Marioli[1], and T. Zawada[2]


[1]Dept. of Electronics for Automation, University of Brescia, Brescia, Italy
[2]Meggitt, Ferroperm Piezoceramics A/S, Kvistgaard, Denmark

The conversion of mechanical energy from environmental vibrations into electrical energy is a key point for powering sensor nodes toward the development of autonomous sensor systems. Piezoelectric energy converters realized in a cantilever configuration are the most studied for this purpose. In order to improve the performances of the converter, the geometry has to be properly designed. In this ...

Variable Capacitance And Pull-In Voltage Analysis Of Electrically Actuated Meander-Suspended Superconducting MEMS

N. AlCheikh[1], P. Xavier[1], J.M. Duchamp[1], C.H. Boucher[2], and K. Schuster[2]
[1]Institute of Microelectronics, Electromagnetism and Photonics (IMEP-LAHC), Minatec, Grenoble, France
[2]Institute of Millimetric Radio Astronomy (IRAM), Grenoble, France

Variable capacitors between the fF and pF range are very interesting for high frequency applications like variable filters, resonators, etc. For radio astronomy applications variable capacitors, realized by electrostatically actuated, micromechanical Meanders-suspended bridges (MEMS) made of superconducting Niobium, have been measured to find C(V). A non plane capacitance behavior have been ...

Optimization of Design Parameters of a Novel MEMS Strain Sensor used for Structural Health Monitoring of Highway Bridges

H. Saboonchi, and D. Ozevin
Civil Engineering Department
University of Illinois at Chicago
Chicago, IL

The novel Micro Electro Mechanical System (MEMS) based Piezoresistive stain sensor is presented in this paper. The main goal of this sensor is to monitor the localized strain in the highway bridges especially near the crack tips. Monitoring the crack growth on the bridges can lead to early detection and prevention of bridge failures. The COMSOL Multiphysics software was used to optimize the ...

Design of Traveling Wave Ultrasonic Vibration Disk for Nano-particles in Liquid Dispersion

J. Muraoka, and T. Suzuki
Yamagata Research Institute of Technology
Yamagata
Japan

The traveling wave ultrasonic vibration disks for dispersion of particles were designed by using of FEM analysis. The vibration disks are required specific vibration pattern, which contains three nodal lines. The vibration disk thickness was calculated to be matched the resonance frequency of bolted langevin type transducer and the specific vibration pattern. The alignment of the transducer was ...

AC Electrothermal Characterization of Doped-Si Heated Microcantilevers Using Frequency-Domain Finite Element Analysis - new

K. Park[1], S. Hamian[1], A. M. Gauffreau[2], T. Walsh[2]
[1]Mechanical Engineering Department, University of Utah, Salt Lake City, UT, USA
[2]Department of Mechanical, Industrial & Systems Engineering, University of Rhode Island, Kingston, RI, USA

This work investigates the frequency-dependent electrothermal behaviors of freestanding doped-silicon heated microcantilever probes operating under the periodic (ac) Joule heating. The transient heat conduction equation for each component (i.e., the low-doped heater region, the high-doped constriction region, and the high-doped leg region) is solved using the general heat transfer module for DC ...

Simulation of Piezoelectrically Actuated Drug Delivery Device for Biomedical Application

J. Dsa[1], Manisha[1], M. Goswami [1], B.R Singh [1],
[1] Indian Institute of information technology Allahabad, Allahabad, Uttar Pradesh, India

We have developed a piezoelectrically controlled MEMS drug delivery device for on-demand release of defined quantities of drug. A drug-loaded micro reservoir (∅6mm×550µm) is sealed by A membrane placed over the drug reservoir on which the piezoelectric material is deposited. On application of voltage across this piezoelectric material , the membrane deflects allowing the fluid to fill into the ...

FEM Based Estimation of Biological Interaction Using a Cantilever Array Sensor

S. Logeshkumar, L. Lavanya, G. Anju, and M. Alagappan
PSG College of Technology
Coimbatore
Tamil Nadu, India

In the model silicon nanorods are designed as cantilever array and coated with thin film of aluminum or aluminum nitride, to be characterized, thus, adding a detectable mass and altering the cantilever resistance to bending. The simulated results show that when films of different thickness are placed on the cantilever, there is a corresponding change in the resonant frequency and the ...