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.

Characterization of a Tonpilz Transducer and Performance Analysis for a MEMS-Transducer Array

V. Vadde, and B. Lakshmi G
PESIT

In this paper, we develop and analyze a standard piezoacoustic Tonpilz-transducer model for underwater acoustics in Comsol by addressing the attendant piezoelectric and pressure acoustic multiphysics phenomena. Transducer properties that are studied and characterized are the center frequency, bandwidth, linearity, sensitivity, and noise figure. In an effort to miniaturize the transducer, a ...

Analysis and Optimization of Dual Arm, Center Excited, Surface Micro-machined Archimedean Spiral Antenna with Improved Wideband Characterestics

G. Miranda[1], N. S. Pamidighantam[1], R. V. Iyer[2], S. Shukla[3], P. Suresh[3], and P. M. Soundarajan[3]
[1]Department of Telecommunications, PESIT, Bangalore,Karnataka,India
[2]Department of Science and Humanities, PESIT, Bangalore,Karnataka,India
[3]DARE,Bangalore,Karnataka,India

An Archimedean Spiral antenna is the common frequency independent antenna which have very large bandwidth. Archimedean Spiral antenna are circularly polarized and typically have radiation patterns with peaks perpendicular to the plane of the spiral. Micro-machining techniques improves the bandwidth characteristics and the radiation efficiency of the antenna. Simulations and results with COMSOL ...

3-D Design, Electro-Thermal Simulation and Geometrical Optimization of Spiral Platinum Micro-Heaters for Low Power Gas Sensing Applications Using COMSOL 4.1

V. Bansal, D. Kumar, B. Prasad, and A. Gujjar
Electronic Science Department

In this paper a thermal electric finite element method (FEM) analysis was used to investigate the thermal properties of individual electrically driven platinum micro-heaters. The geometric optimization for the micro-heater was performed by simulating a wide range of possible geometries using COMSOL 4.1. The simulated results of micro-heaters having an improved temperature distribution over the ...

Effect of Bed Diffusion and Operating Parameters on Char Combustion in the Context of Underground Coal Gasification

S. Mahajani, and G. Samdani
Indian Institute of Technology Bombay
Mumbai, India

Char combustion is one of the most important reactions in the process of Underground Coal Gasification (UCG). Experiments are performed in a boat reactor under near isothermal condition to demonstrate effects of heat and mass transfer and bed diffusion through ash layer. To obtain a complete overview of boat experiments and to further get insights, CFD analysis of boat reactor is performed using ...

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 ...

Intraplate Stress Analysis by COMSOL Multiphysics

G. Swetha, G. Pavankumar, and A. Manglik
National Geophysical Research Institute
Hyderabad
Andhra Pradesh, India

Mathematical modeling tools are extensively used in Geosciences to delineate the earth structure at various spatial scales as well as to simulate coupled earth processes involving multiphysics concepts. COMSOL, a Multiphysics finite element method based numerical modeling package, can be used to analyze complex systems like earth where various physical parameters are involved and ...

Simulations of Polymer Based Micro Heater Operated at Low Voltage

M. Gayake[1], D. Bodas[2], and S. A. Gangal[1]
[1]Department of Electronic science, University of Pune, India
[2]Centre for Nanobioscience, Agharkar Research Institute, India

This paper presents a design of polymer based micro heater operating in the temperature range of 200- 250°C which could be operated at low voltage (battery operated). The micro heater has been designed and simulated using COMSOL 4.1, FEM simulation tool. Simulation was performed for temperature variation and temperature distribution area is observed for various designs of micro heater by ...

Heat Transfer Modeling and Analysis of a Rotary Regenerative Air Pre-heater

R. K. Krishna, R. Ramachandran, and P. Srinivasan
Birla Institute of Technology and Science
Pilani
Rajasthan, India

An attempt has been made to sustain the efficiency of an air pre-heater(APH) in the long run. The APH is modeled using COMSOL Multiphysics in 3D and fed with real life conditions. Upon Heat transfer analysis, the temperature profile was found out and from that, the regions undergoing maximum thermal fatigue stress was identified. The plates of the APH to the periphery are subjected to maximum ...

Numerical Study on Mechanical Properties of Stents with Different Materials during Stent Deployment with Balloon Expansion.

P. Ghosh[1], K. DasGupta[1], D. Nag[2], and A. Chanda[1]
[1]School of Bio Science & Engineering, Jadavpur University, Kolkata, West Bengal, India
[2]Mechanical Engineering Department, Jadavpur University, Kolkata, West Bengal, India

The main reason for stent implantation is to provide mechanical support to the arterial wall. So it is important to consider the different mechanical properties of different stent materials while studying the stent implant’s efficacy. The present study gives a comparative overview of mechanical aspects of different stent materials which are most commonly used in angioplasty. Deformation ...

Experimental and Theoretical Investigation of Acoustic Metamaterial with Negative Bulk-Modulus

N. R. Mahesh, and P. Nair
SSN College of Engineering
Chennai
Tamil Nadu, India

Acoustic metamaterials are structured materials of negative mass density or negative bulk-modulus or both of them. Materials are tailored in sub-wavelength dimensions so as to get these negative properties. This paper compares the result of an experimental investigation of acoustic metamaterial with negative bulk-modulus to its COMSOL modeling. The resonance characteristics of single ...

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