Technical Papers and Presentations

Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

On the Simulation of Electromagnetic Forming Process of a Tube using Multiphysics Software

S. Gawade[1], P. P. Date[2], and S. B. Sharma[1]
[1]Production Engineering. Dept. SGGS IE&T, Nanded, India
[2]Mechanical Engineering. Dept, IIT, Bombay, India

Electromagnetic forming (EMF) is a typical high speed forming process using the energy density of a pulsed magnetic field to form workpieces made of metals with high electrical conductivity like e.g. aluminium. This forming process can be very advantageous as compared to conventional forming process. EMF process is simulated by a commercial finite element analysis (FEA) solver, COMSOL ...

Finite Element Modeling of Freezing of Coffee Solution

C. Anandharamakrishnan, R. Gopirajah, and N. Chhanwal
Central Food Technological Research Institute
Mysore
Karnataka, India

Freeze-drying is a popular method of producing shelf stable particulate products and is of particular value for drying thermally sensitive materials (volatiles and biological based), which can be heat damaged by higher temperature methods, such as spray-drying. Porous structures are formed by the creation of ice crystals during the freezing stage, which subsequently sublime during the drying ...

MEMS Electrostatic Comb Actuator: A Comparison of Different Structure Designs and Materials using COMSOL 3.5a

S. Kapoor[1], D. Aggarwal[2], and A. Gujjar[1]
[1]University Institute of Engineering and Technology, Kurukshetra University, Kurukshetra, Haryana, India.
[2]Electronics Science Department, University Institute of Engineering and Technology, Kurukshetra University, Haryana, India.

The micro machining technology that emerged in the late 1980’s can provide micron sized sensors and actuators. Actuators are used for the transformation of non- mechanical input energy into mechanical output energy. There are many types of micro- actuation mechanisms, most commonly used are piezoelectric, magnetic, thermal, SMA, electrochemical, electrostatic actuation. Electrostatic actuation ...

Design and Simulation of MEMS Based Electrothermal Micromirror for 3D Spatial Movement

D. Mallick, and A. Bhattacharyya
Institute of Radio Physics and Electronics
University of Calcutta
West Bengal, India

Micromirror is a versatile MEMS device, which finds use in many application areas. In this paper, we have addressed the issues related to the design and behavioral simulation of MEMS based electro-thermal micromirror [Figure 1] for 3D motion. Two types of thermal actuation mechanism are used in the designed device. For in-plane movement poly-silicon made two-hot-arm actuatoris used. Here, the ...

Evaluation of Tensile Modulus of Carbon Nanotube Bundle Based Composite with Interface Using Finite Element Method

M. S. Islam, F. O. Riktan, S. C. Chowdhury, M. M. R. Chowdhury, and S. Ahmed
Bangladesh University of Engineering & Technology (BUET)
Dhaka, Bangladesh

Carbon Nanotubes (CNTs) have remarkable mechanical, thermal and electrical properties. The properties of CNTs depend on atomic arrangement (how the sheets of graphite are rolled), the diameter and length of the tubes and morphology of nanostructure. In this paper effective elastic properties of CNT based polymer composites are evaluated using a square Representative Volume Element (RVE) in ...

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 ...

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 ...

Design, Simulation and Study of MEMS Based Micro-Needles and Micro-Pump for Biomedical Applications

P. K. Podder, D. Mallick, D. P. Samajdar, and A. Bhattacharyya
Institute of Radio Physics and Electronics
University of Calcutta
Kolkata
West Bengal, India

In this paper, we have addressed the issues related to the design and simulation of MEMS based silicon micro-needles for insertion of fluid into the dermis layer and into the subcutaneous fat layer. In addition, a poly-silicon micro-pump based on the principle of electrostatic actuation has been designed and simulated which can be integrated with the proposed micro-needles to control the fluid ...

Electrowetting-On-Dielectric Induced Droplet Actuation in M x N Array of Electrode

S. Sohail[1], D. Das[1], S. Das[2], and K. Biswas[1]
[1]Electrical Engineering Department, IIT Kharagpur
[2]School of Medical Science and Technology, IIT Kharagpur

Digital microfluidic system based on EWOD (electrowetting-on-dielectric) technology can perform different fluidic operations on the same electrode array by simply modifying control software. One of the major challenges in EWOD device is to address each electrode individually in M x N array of electrode using simple fabrication architecture without compromising in system performance. The ...

MEMS Resonator for RF Applications

V. Harshey
Visvesvaraya National Institute of Technology
Nagpur
Maharashtra, India

Vibrating mechanical tank components, such as quartz crystals and surface acoustic wave (SAW) resonators with Q’s in the range of 10e3–10e6, are widely used to implement high-Q oscillators and band pass filters in the radio frequency (RF) and intermediate frequency (IF) stages of communication transceivers. This paper will discuss designing of resonator and effects of various parameter on the ...

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