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.

Study of Capacitance in Electrostatic Comb-Drive Actuators

P. Hanasi [1], B. G. Sheeparamatti [1], V. Abbigeri [1], N. Meti [1],
[1] Visvesvaraya Technological University, Belagavi, Karnataka, India

Capacitor is mainly defined as two conducting plates that can hold the opposite charges on it. These plates can be used either as a sensor or an actuator. If the relative distance between the two conductors changes as result of given input, then capacitance values will change. This results in basic of capacitive or electrostatic sensing configuration. On the other hand, if a voltage or the ...

Simulation of Piezoelectric Transformers with COMSOL

T. Andersen[1], M. A. E. Andersen[1], O. C. Thomsen[1]
[1]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. ...

Design & Simulation of Various Shapes of Cantilever Beam for Piezoelectric Power Generator

P. Graak [1], S. Kaur [1], A. Gupta [1], P. Chhabra [1], D. Kumar [1], A. Shetty [2]
[1] Kurukshetra University, Kurukshetra, Haryana, India
[2] Indian Institute of Science, Bengaluru, Karnataka, India

The ambient vibrations can be of great promise for harvesting energy initially at small scale to use for micro and nano scale devices. Such vibrations converted to electrical energy by piezoelectric transducer due to their major significance. Various research journals have introduced the phenomenon of energy optimization to increase the generated power and used directly for application like ...

Surface Acoustic Wave Based MEMS Resonator

S. Dixit[1], R. C. Jain[1]
[1]Jaypee Institute of Information Technology, Noida, Uttar Pradesh, India

Surface Acoustic Waves (SAW) is the acoustic wave that propagates along the surface of the substrate with amplitude decaying exponentially away from the surface. A basic SAW device consists of two IDT’s on a piezoelectric substrate such as quartz. Surface Acoustic Wave can be generated by application of a voltage to an IDT deposited on the surface of a piezoelectric substrate. The ...

Three-Dimensional Modeling of Electrical Scanning Probe Microscopy Problems

G. Gomila [1], L. Fumagalli [2], R. Fabregas [3],
[1] Institut de Bioenginyeria de Catalunya (IBEC), Departament d’Electrònica, Universitat de Barcelona, Barcelona, Spain
[2] School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
[3] Institut de Bioenginyeria de Catalunya (IBEC), Universitat de Barcelona, Barcelona, Spain

Electrical scanning probe microscopy (SPM) techniques, such as electrostatic force microscopy, nanoscale impedance microscopy or scanning near field microwave microscopy, are a relatively new branch of microscopy techniques that can generate images of the nanoscale electrical properties of samples (conductivity, permittivity, charge, etc.). These techniques scan the surface of a sample ...

Demonstration of All-Optical NAND Logic Gate Using Photonic Integrated Circuits

J. T. Andrews[1], R. Choubey[1], O P Choudhary[1], N. Malviya[1], A. Patel[1], M. Kumar[1], S. Chouksey[1], J. Solanki[1]
[1]National MEMS Design Center, Department of Applied Physics, Shri G S Institute of Technology & Science, Indore 452003 MP, India

A logic gate performs a certain Boolean logic operation on one or more logical inputs and produces a single logical output. The logic values are either “true” or “false.” Logic gates are bistable devices, that is, they may yield one of these two possible stable outputs. The NAND logic is a universal gate; any logic operation can be performed with various combinations of NAND logics. Many ...

MEMS Based Silicon Load Cell for Weighing Applications

D. Chauhan[1], B. D. Pant[2]
[1]Kurukshetra University, Kurukshetra, Haryana, India
[2]CSIR- Central Electronics Engineering Research Institute, Pilani, Rajasthan, India

Load cells are force sensors, which are used in weighing equipment. The objective of this work is to develop MEMS based load cell. In this work two different load cell designs were simulated. First design is based on compressing a meander like polysilicon strain gage for the measurement of high forces up to 10kN. Second design is based on MEMS pressure sensor consisting of membrane, on which ...

Optimization of MEMS Based Capacitive Accelerometer for Fully Implantable Hearing Aid Application

A. Dwivedi [1], G. Khanna [1],
[1] NIT Hamirpur, Hamirpur, Himachal Pradesh, India

This work describes the design and optimization of three prototypes of microelectromechanical systems (MEMS) capacitive accelerometer-based middle ear microphone. The microphone is intended for middle ear hearing aids as well as future fully implantable cochlear prosthesis. The analysis is done using COMSOL Multiphysics®. The maximum applied acceleration was considered 1g. Human temporal bones ...

Sensitivity Optimization of Microfluidic Capacitance Sensors

S. Satti[1], M. Baghini[1]
[1]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 ...

Fluid-structure Interaction Modeling of Air Bearing

H.R. Javani[1], P. Kagan[2], F. Huizinga[1]
[1]ASML - MDev – Mechanical analysis, Veldhoven, The Netherlands
[2]ASML - MDev – System Dynamics, Veldhoven, The Netherlands

Air bearings are special type of bearings which provide nearly zero friction between two surfaces. This is achieved by a compressed layer of gas between the surfaces. This study presents a modeling technique for an Air bearing component. COMSOL Multiphysics® is used to efficiently solve a coupled Fluid-Structure Interaction analysis. Computational time is significantly reduced compared to ...