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.

High-Intensity Piezo-Ceramic Ultrasonic Transducer with Mechanical Amplifier and Radiation Plate

A. van Wijhe[1], W. de Jong[1]
[1]Process & Energy, 3mE, TU Delft, The Netherlands

A COMSOL Multiphysics® model was made to design a mechanical amplifier and radiation plate for the emission of high intensity 40.5 kHz ultrasound to air by means of a Langevin type transducer usually applied in cleaning baths for example. In this work, ultrasonic irradiation is aimed at acting on flue gas containing fine particulate matter to realize a shift to higher effective particle sizes as ...

Fluid-Structure Interaction Analysis of a Peristaltic Pump

N. Elabbasi, J. Bergstrom, and S. Brown
Veryst Engineering, LLC.
Needham, MA

Peristaltic pumping is an inherently nonlinear multiphysics problem where the deformation of the tube and the pumped fluid are strongly coupled. We used COMSOL Multiphysics to investigate the performance of a 180 degree rotary peristaltic pump with two metallic rollers, and an elastomeric tube pumping a viscous Newtonian fluid. The model captures the peristaltic flow, the flow fluctuations ...

A Concrete Arch Dam under Seismic Loading Conditions

A. Frigerio[1], G. Mazzà[1]
[1]RSE S.p.A., Milan, Italy

A new regulation for the safety assessment of dams has just been developed in Italy and its approval process is still in progress. As a matter of fact the behaviour of dams under seismic loading conditions is deemed of actual interest due to the recent seismic events occurred. In earthquake analysis, some of the most challenging aspects dam engineers have to deal with are: the capability to take ...

Two-Dimensional FEM Simulation of Ultrasonic Wave Propagation in Isotropic Solid Media using COMSOL

B. Ghose[1], K. Balasubramaniam[2], C.V. Krishnamurthy[3], and A.S. Rao[1]
[1] High Energy Materials Research Laboratory, Pune, Maharashtra, India
[2] Center for Non Destructive Evaluation, Department of Mechanical Engineering, IIT Madras Chennai, Tamil Nadu, India
[3] Department of Physics, IIT Madras,Chennai, Tamil Nadu, India

Ultrasonic Testing (UT) is one of the important Non-Destructive Evaluation (NDE) technique widely used for characterisation of materials as well as detection and characterisation of flaws present in the material used in various industries. There are many different important materials like metals, metallic alloys, rubber, composites etc used in aerospace industries is being inspected using UT as ...

Modeling of MEMS Based Bolometer for Measuring Radiations from Nuclear Power Plant

S. Nisitha[1], T. Satyanarayana[2], S. Sreeja[1]
[1]Department of EIE, Lakireddy Bali Reddy Engineering College, Mylavaram, Andhra Pradesh, India.
[2]NPMASS Centre, Department of EIE, Lakireddy Bali Reddy Autonomous Engineering College, Mylavaram, Andhra
Pradesh, India

There has been growing demand for high performance micro sensors capable of detecting nuclear radiations being released from various industries, Nuclear reactors. Radiations emitted from the radioactive materials are invisible and not directly detectable by human senses. Thus it is highly essential to work on design of bolometers with absorptive elements providing optimum sensitivity. The ...

Key-Holes Magnetron Design and Multiphysics Simulation

A. Leggieri[1], F. Di Paolo[1], D. Passi[1]
[1]Univeristy of Rome "Tor Vergata" - Department of Electronic Engineering, Rome, Italy

This paper describes the design and characterization of an 8 slots resonant cavity Magnetron, which undergoes thermal-structural effects due to cathode heating. The proposed study involves Thermal Stress, Eigen-frequency and Particle Tracing analysis based on COMSOL Multiphysics®. Magnetrons are well known and often utilized High Power Radiofrequency Vacuum Tube oscillators. In order to ...

Dynamic Crack Propagation in Fiber Reinforced Composites

C. Caruso[1], P. Lonetti[1], and A. Manna[1]

[1]Department of Structural Engineering, University of Calabria, Arcavacata di Rende, CS, Italy

A generalized model to predict dynamic crack propagation in fiber composite structures is proposed. The proposed approach is based on a generalized formulation based on the Fracture Mechanics approach and Moving mesh methodology. Consistently to the Fracture Mechanics, the crack propagation depends from the energy release rate and its mode components, which are calculated by means of the ...

Finite Element Modeling of a Pulsed Spiral Coil Electromagnetic Acoustic Transducer (EMAT) for the Testing of Plates

R. Dhayalan[1], A. Kumar[2], B. Purnachandra Rao[3], T. Jayakumar[2]
[1]Metallurgy and Material Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, TN, India
[2]Nondestructive Evaluation Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, TN, India
[3]Ultrasonic Measurements Section, Nondestructive Evaluation Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, TN, India

This paper presents numerical simulation of plate wave modes in thin stainless steel plates using a racetrack spiral coil electromagnetic acoustic transducer (EMAT), which works under the principle of acousto-elastic effect, called Lorentz force mechanism. EMATs are useful for non-contact ultrasonic nondestructive testing (NDT) of metallic materials for detecting defects and measuring thickness. ...

A Parametric Study on the Dynamic Behavior of Cable Supported Bridges Under Moving Loads Affected by Accidental Failure Mechanisms

P. Lonetti[1], A. Pascuzzo[1], R. Sarubbo[1]
[1]Department of Structural Engineering, University of Calabria, Rende, Cosenza, Italy

The dynamic behavior of cable supported bridges subjected to moving loads and affected by corrosion and accidental failure mechanism in the cable suspension system is investigated. The different types of cable supported bridges are distinctively characterized by the configuration of the cable system [1]. The suspension system comprises a parabolic main cable and vertical hanger cables connecting ...

Theoretical and Practical Approach for Transdermal Drug Delivery using Microneedle for Successful Skin Penetration

Jeevan J.Mahakud[1], Ziaur Reheman[2]
[1]Department of electronics and Communication engineering, Institute of technical education and research, Bhubaneswar, Odisha, India
[2]Department of electronics and instrumentation engineering, Institute of technical education and research, Bhubaneswar, Odisha, India

With the advent of MEMS, transdermal drug delivery has been developed to increase skin permeability for drug transport. Various microneedle structures have been analyzed theoretically as well as through simulation using COMSOL Multiphysics®. Then computational fluid dynamics has been presented in order to study the behavior of the fluid flow inside the microneedle cavity. In this report, the ...

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