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.

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 ...

Fully Coupled Thermo-Hydro-Mechanical Modeling by COMSOL Multiphysics, with Applications in Reservoir Geomechanical Characterization

T. Freeman[1], R. Chalaturnyk[1], and I. Bogdanov[2]
[1]University of Alberta, Edmonton, AB, Canada
[2]Centre Huile Lourde Ouvert et Expérimental (CHLOE), France

Because of the complex nature of geomaterials and presence of solid and fluid within a single system, it is crucial to consider all the physics involved within the geomaterial system. A fully coupled thermo-hydromechanical model is developed. The model consists of a three-phase flow model designed as a set of coupled PDE application modes that when coupled with the Heat Transfer Module and ...

3D Acoustic Streaming Field in High-Intensity Discharge Lamps - new

B. Baumann[1], J. Schwieger[1], M. Wolff[1], F. Manders[2], J. Suijker[2]
[1]Hamburg University of Applied Sciences, Hamburg, Germany
[2]Philips Lighting, Turnhout, Belgium

High-intensity discharge lamps will in the foreseeable future be important light sources despite a growing market share of LEDs. Cost and energy efficient high frequency (300 kHz) operation is hampered by the excitation of acoustic resonances inside the arc tube, which results in low frequency (10 Hz) light flicker. Our aim is to calculate the acoustic streaming velocity field, which is related ...

COMSOL Multiphysics in Plasmonics and Metamaterials

S. Sun [1,2], and G. Guo [2,3]
[1]Physics Division, National Center for Theoretical Sciences (North), National Taiwan University, Taipei 10617, Taiwan
[2]Department of Physics, National Taiwan University, Taipei 10617, Taiwan
[3]Graduate Institute of Applied Physics, National Chengchi University, Taipei 11605, Taiwan

This paper will present research about: * Effective-medium properties of metamaterials: A quasi-mode theory * 2D complete band gaps from 1D photonic crystal * Optical microcavities

Excimer Laser-Annealing of Amorphous Silicon Layers

J. Förster, and H. Vogt
Institute of Electronic Components and Circuits
University Duisburg-Essen
Duisburg, Germany

A one-dimensional model of Excimer Laser-Annealing of amorphous silicon layers which are irradiated with a KrF excimer laser is described. For realisation, the application mode heat transfer in solids is used. The model predicts a melt threshold for the energy density of the laser of 88.5 mJ/cm^2. It also predicts a linear increase of the melt duration with a slope of approximately 625 (ns*cm^2) ...

Development of a User Interface for Design of SO2 Oxidation Fixed-Bed Reactors

A. Nagaraj [1], P. L. Mills [1],
[1] Texas A&M University - Kingsville, Kingsville, TX, USA

H2SO4 is a very important chemical commodity, and indeed, a nation’s H2SO4 production has been a reasonably good indicator of its industrial strength for the last century or so1,2. Nearly 350 MM tons of H2SO4 was produced in 20143.The demand for H2SO4 in United States exceeds the supply and hence to increase production, recycling and innovative clean technologies must be explored. From ...

Simulation of PTFE Billet Sintering using COMSOL

A. Roday, and P. Nicosia
Garlock Sealing Technologies
Palmyra, NY

Sintering is an important step in the manufacturing of polytetrafluoroethylene (PTFE) billets. The challenge in heating large billets stems from the inherent low thermal conductivity of PTFE. Existing literature suggests determining maximum heating rate experimentally using recommended guidelines. This paper uses COMSOL to aid in optimizing the temperature profile required for a particular ...

Fluid-Structure Interaction Model of Active Eustachian Tube Function in Healthy Adult Patients

F. Sheer[1], and S. Ghadiali [1,2]
[1]Mechanical Engineering Department, Lehigh University, Bethlehem, PA, USA
[2]Department of Biomedical Engineering, Ohio State University, Columbus, OH, USA

The Eustachian Tube (ET) is a collapsible tube that connects the middle ear to the nasopharynx. Dysfunction in the ET leads to a disease called Otitis Media. Our goal is to develop and use fluid-structure interaction (FSI) models of ET opening phenomena to better understand what factors contribute to ET dysfunction in certain patients. We model the ET in COMSOL using geometric data obtained ...

Sensitivity Analysis of Different Models of Piezoresistive Micro Pressure Sensors

S. Meenatchisundaram[1], S. M. Kulkarni[2], S. Bhat
[1]Department of Instrumentation and Control Engineering, Manipal Institute of Technology, Manipal, Karnataka, India.
[2]Department of Mechanical Engineering, National Institute of Technology, Surathkal, Karnataka, India.

Piezoresistive pressure sensors have received much attention over the years because of low cost, simple measurement techniques, etc. There is a challenge in design with respect to appropriate positioning, shape and temperature compensation. Different models of piezoresistive pressure sensors are proposed to enhance its sensitivity in terms of output voltage. This paper aims in sensitivity ...

An Overview of Impellers, Velocity Profile and Reactor Design - new

P. Patel[1], P. Vaidya[1], G. Singh[2]
[1]Indian Institute of Technology Bombay, Mumbai, Maharashtra, India
[2]Indian Oil Corporation Limited, Faridabad, Haryana, India

This paper presents a simulation approach to develop a model for understanding the mixing phenomenon in a stirred vessel. The mixing in the vessel is important for effective chemical reaction, heat transfer, mass transfer and phase homogeneity. In some cases, it is very difficult to obtain experimental information and it takes a long time to collect the data. Such problems can be solved using ...