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.

Scale-up Design of Ultrasound Irradiator for Advanced Oxidation Process (AOP) Using COMSOL Multiphysics® Simulation

Z. Wei[1]
[1]The Ohio State University, Columbus, OH, USA

Ultrasound is a promising green technology for the advanced oxidation process (AOP) since it adds no chemicals to the treated water. In this paper, COMSOL Multiphysics® was used as a tool to design and characterize an ultrasound irradiator with multi-stepped configuration, which aims to overcome disadvantages of typical irradiators and to enhance contaminant removal in large-scale water ...

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 ...

Design and Simulation of MEMS Based Piezoelectric Insulin Micro-Pump

F. Meshkinfam [1],
[1] University of Ontario Institute of Technology, Oshawa, ON, Canada

One of the most effective treatments for diabetes type 1 and 2 is the administering Insulin. The design of positive volumetric insulin pump is significantly a multiphysics problem where the volumetric change of the main pump chamber and the pumped fluid are directly coupled. We used COMSOL Multiphysics® to investigate the performance of a MEMS based Insulin Micro-Pump with a Piezoelectric ...

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 ...

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 ...

Degeneracy Breaking, Modal Symmetry and MEMS Biosensors

H.T.D. Grigg[1], T.H. Hanley[1], B.J. Gallacher[1]
[1]Newcastle University, Newcastle upon Tyne, United Kingdom

This work is concerned with systems possessing cyclic symmetries. In particular, we concentrate on the case in which the medium possesses infinite order cyclic symmetry, while the constitutive relations have cyclic symmetry of a lower order. We investigate the interactions between modes with cyclic symmetry of order n and geometries with underlying cyclic symmetry of order M. Rayleigh's ...

Determination of Mechanic Resistance of Osseous Element Through Finite Element Modeling

E. Isaza[1], E. Salazar[1], L. Florez[1]
[1]Universidad Tecnológica de Pereira, Pereira, Risaralda, Colombia

The consequences of hip fracture and femoral fracture are widely known. The mechanical strength of the femur varies in every person, but it is possible to predict the mechanical resistance with parameters like density, dimensions and mineral content. This paper uses different models and empirical studies to determine the mechanical properties of the human femur, developing isotropic and ...

Modeling of Residual Stresses in a Butt-welded Joint with Experimental Validation

V. Srivastava [1],
[1] Naval Materials Research Laboratory (NMRL), Defence Research and Development Organization (DRDO), Ambernath, Thane, Maharashtra, India

2D-modeling of arc welding in butt-joint configuration was performed in this study considering thermal-structural interactions. Thermal behavior was modeled in COMSOL Multiphysics® using the Heat Transfer Module with weld heat input as a Gaussian pulse whereas structural behavior using Structural Mechanics Module. Thermal-elastic-plastic behavior model based on Von Mises yield criteria and ...

Modeling the Sound Radiation by Loudspeaker Cabinets - new

M. Cobianchi[1], M. Rousseau[1]
[1] B&W Group Ltd, Steyning, UK

While musical instruments often rely on a body which resonates on purposefully to amplify the vibration produced by a string or a membrane, such as in a violin or a guitar, loudspeaker cabinets should not contribute at all to the total sound radiation, but aim instead to be a perfectly rigid box which encloses the drive units in charge to transform the electrical signal at their terminal into ...

Birefringence Induced in Optical Rib Waveguides by Thermal and Mechanical Stresses - new

G. Grasso[1], V. M. N. Passaro[1], F. De Leonardis[1]
[1]Photonics Research Group, Politechnic Institute of Bari, Bari, Italy

In this paper a multiphysics approach to study the optical properties of integrated waveguides influenced by thermal and mechanical stress is presented. The heating and pressure effects are evaluated by means the Heat Transfer and Structural Mechanics modules respectively. Finally, the electromagnetics capabilities of the AC/DC Module are used in order to evaluate the optical eigenfunctions and ...