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.

Experimental Validation of Model of Electro-Chemical-Mechanical Planarization (ECMP) of Copper

J. Ebert[1], S. Ghosal[1], A. Emami-Naeini[1]
[1]SC Solutions, Sunnyvale, CA, USA

This paper describes the development of a COMSOL model of Electro-Chemical-Mechanical Planarization (ECMP) that was validated with experimental data. ECMP is used for processing of semiconductor wafers. We developed a 2D model of flow of phosphoric acid solution (the electrolyte) between two parallel plates that focuses on the physics and electrochemistry in ECMP. The model includes steady-state ...

Modeling Flow and Deformation during Hot Air Puffing of Single Rice Kernels

T. Gulati[1], A. Datta[1]
[1]Cornell University, Ithaca, NY, USA

When rice is subjected to intense heating, it results in rapid evaporation of liquid water to vapor. As a consequence, large pressures are generated within the kernel in a span of 15s resulting in large volume changes causing the kernel to puff rapidly. Under suitable conditions, the ratio of initial volume to volume after puffing could be as high as 10. Rice puffing process is a complex ...

Computational Modelling of Fluid Dynamics in Electropolishing of Radiofrequency Accelerating Cavities - new

H. Rana[1], L. Ferreira[2]
[1]Loughborough University, Leicestershire, UK
[2]European Organisation for Nuclear Research (CERN), Genéve, Switzerland

Electropolishing is an electrochemical process that radiofrequency accelerating cavities undergo in order to improve their inner metal surface finishing. This is performed prior to their installation into particle accelerators, in order to enhance their accelerating properties. Using COMSOL Multiphysics® software it was possible to model the process throughout the cavity and study the fluid ...

Performance of a Miniaturized Hydrocyclone for the Isolation of Schistosoma Mansoni Eggs - new

C. Soares[1], N. Padoin[1], F. Montalvo[2], D. Cobra[2]
[1]Federal University of Santa Catarina, Florianópolis, SC, Brazil
[2]CERTI Foundation, Florianópolis, SC, Brazil

Schistosoma mansoni parasites affect million people worldwide. The intensity of the infection can be evaluated by the number of eggs present in the stool of an infected individual. The application of the traditional methods has been regarded as impractical in developing areas and there is a continuous search for new techniques. In face of this scenario, a new method of diagnosis was explored in ...

Network-of-Zones Model for Stirred Tank with Fractal Impeller - new

G.M. Mule[1], A.A. Kulkarni[1]
[1]CSIR - National Chemical Laboratory, Pune, Maharashtra, India

Stirred tanks are widely used in the pharmaceuticals, chemical and paint industries for variety of operations. The fractal impeller is an impeller having a novel design, developed by CSIR-National Chemical Laboratory, Pune, India. The power number of fractal impeller is relatively lower than the conventional impellers. The mixing performance is also relatively better than the conventional ...

Numerical modeling of coupled heat and mass transport during frying and cooling of wood in contact with oil

Grenier, D.1, 2, Bohuon, P.1, 3, Baillière, H.1, Ben Lalli, A., Méot, J.M.1
1 CIRAD, Montpellier cedex, France
2 CTBA, Bordeaux cedex, France
3 ENSIA, 1101, Montpellier cedex, France

This paper proposes a model of coupled heat and mass (water, oil) transport in a porous medium (timber) soaked first in a hot oil bath, then in a cold oil bath. The timber is soaked at hot temperature to dry it (water vaporization, resulting in increased pressure and therefore vapor transport) and at cold temperature to treat it (vapor condensation, resulting in decreased pressure and oil ...

FEMLAB/MATLAB model for complex electric swing adsorption (ESA) system with in-vessel condensation

Petkovska, M.1, Antov-Bozalo, D.1, Markovic A.1, Sullivan, P.2
1 Faculty of Technology and Metallurgy, University of Belgrade Karnegijeva 4, Belgrade, Serbia and Montenegro

The subject of this investigation is a recently developed Electric Swing Adsorption (ESA) system (adsorption cycle with electrothermal desorption step, which is performed by direct heating of the adsorbent particles by passing electric current through them), with an adsorber assembled of two annular, radial-flow, cartridge-type fixed-beds, with in-vessel condensation. Three FEMLAB models were ...

Modeling the iodine removal efficiency and temperature behavior for an FADS charcoal filter by FEMLAB

Qin, Z.1, Wren, J.C.1, Moore, C.J.2
1 Department of Chemistry, The University of Western Ontario, London, Ontario, Canada
2 Chalk River Laboratories, Atomic Energy of Canada Limited Chalk River, Ontario, Canada

A key component of the Filtered Air Discharge System in nuclear power reactors is a charcoal filter, intended to remove gaseous fission products, mainly radioiodine, in the unlikely event of an accident. Models for removal of CH3I and temperature behaviour of a charcoal filter have been described. The CH3I removal model is based on a mass balance equation consisting of CH3I transport due to ...

COMSOL Modelling of the Gas Mixing Process in a Ripple Reducer for NPL’s Time Division Dilution System

J. Wang, B.A. Goody, and M.J.T. Milton
National Physical Laboratory, Teddington, Middlesex, UK

The mixing process of a ripple reducer designed for a time division dilution system (TDD) that dynamically generates calibration gas mixtures is modelled in 2D using COMSOL Multiphysics. The model can been used to visualize and optimize the mixing process and extract parameters of interest at chosen times and positions. The simulated time response of an analyte concentration agrees with ...

Modeling Of A Strongly Coupled Thermal, Hydraulic And Chemical Problem: Drying And Low-Temperature Pyrolysis Of Chromated Copper Arsenate (CCA)-Wood Waste Particles In A Moving Bed Reactor

J. Govaerts[1], and L. Helsen[2]
[1]SCK-CEN, Belgian Nuclear Research Centre, Performance Assessment Unit, Mol, Belgium
[2]Department of Mechanical Engineering, Division of Applied Mechanics and Energy Conversion, Katholieke Universiteit Leuven, Heverlee, Belgium

Low temperature thermal carbonisation might be the ultimate solution to the growing disposal problem of CopperChromeArsenic-treated waste wood. This energy and material recuperating technology is currently in the process of upscaling to an industrial level. In the present study, a numerical model is developed in COMSOL Multiphysics that allows to investigate the temperature profiles, gas ...

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