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.

COMSOL Multiphysics Simulations of Microfluidic Systems for Biomedical Applications

M. Dimaki, J. Moresco Lange, P. Vazquez, P. Shah, F. Okkels, and W. Svendsen
Department of Micro- and Nanotechnology, Technical University of Denmark, Lyngby, Denmark

The need for fast, easy and cost-effective analysis of blood samples as well as our understanding of the functionality of cells and neurons are two rather pressing issues in the modern world. Both of these can be addressed by functional lab-on-a-chip systems, which have been designed and optimized for specific analyses. This paper deals with the design of several different systems for cell ...

Determination of Process Parameters for Electron Beam Sintering (EBS)

M. F. Zäh, S. Lutzmann, M. Kahnert, and F. Walchshäusl
iwb Anwenderzentrum Augsburg, TU München, Augsburg, Germany

Additive Layer Manufacturing (ALM) methods, like Electron Beam Sintering (EBS), constitute an interesting process concerning the production of small series and customized products. However, transient effects occur during processing due to the different physical principles of an electron beam (EB). Thus, process knowledge from similar ALM technologies, for instance Selective Laser Melting, can ...

A Heat Transfer Model for Ugitech’s Continuous Casting Machine

C. Deville-Cavellin
Dr.
Liquid Metal Metallurgy and Solidification department
Ugitech’s Research Center, Ugine, France

Dr. Christian Deville-Cavellin is a Research Engineer at Ugitech's Research Center, since 1995. Ugitech, member of the Schmoltz & Bickenbach group, is a stainless steel, long products producer. C. Deville-Cavellin is responsible for all research topics related to liquid metal metallurgy and solidification. He also keeps an expert role in machinability, within one of the french public ...

Advanced Modeling of Friction Stir Welding – Improved Material Model for Aluminum Alloys and Modeling of Different Materials with Different Properties by Using the Level Set Method

S. Dörfler
Wilhelm Gronbach GmbH, Wasserburg a. Inn, Germany

Friction Stir Welding (FSW) has gained much importance throughout the last years. Beside comprehensive experimental work that has been carried out, the simulation of the welding zone is of major interest.  Due to the high strains observed within the welding zone, the Eulerian (CFD) approach seems to be the most promising for the prediction of flow around the FSW tool. However, the CFD ...

Modeling the Thermally Induced Curvature of Multilayer Coatings with COMSOL MultiphysicsTM

H. Conrad[1], T. Klose[2], T. Sandner[2], D. Jung[1], H. Schenk[2], and H. Lakner[1,2]
[1]Semiconductor and Microsystems Technology Laboratory, Technische Universität Dresden, Germany
[2]Fraunhofer Institute for Photonic Microsystems Dresden, Germany

Within this paper the so called “birth and death” method is demonstrated in use with COMSOL Multiphysics®. With this method the free and reactionless movement of a solid structure on deformed geometries and the activation of this solid structure at later simulation steps is possible. For demonstrating the benefit, this method was applied to simulate the thermal induced ...

Modeling the Process of Drying Stationary Objects inside a Tumble Dryer Using COMSOL Multiphysics

T. Zeineldin
Department of Automatic Control and Mechatronics, University of Paderborn, Paderborn, Germany

Temperature and residual moisture content of a stationary Textile in a home tumble dryer are simulated in a 2D model with COMSOL Multiphysics. Moisture migration to the textile surface is modeled in the form of capillary flow and vapor diffusion along with heat transfer in the form of conduction and energy lost due to phase change (evaporation). The drying air energy, mass and momentum transport ...

Mathematical Investigation and CFD Simulation of Monolith Reactors: Catalytic Combustion of Methane

M. Ghadrdan[1], and H. Mehdizadeh[2]
[1]Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
[2]Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran

Interest in the production of hydrogen from hydrocarbons has grown significantly recently. In order to achieve high surface to volume ratio with reasonable pressure drop, monolithic reactors are used. The goal of this work is to develop a two-phase (gas & solid) transient catalytic combustor model using a simplified flow field inside a single channel to test the advantages of the COMSOL ...

Simulation of Unidirectional Interdigital Transducers in SAW Devices using COMSOL Multiphysics

D. Pradeep, N. Krishnan, and H. Nemade
Department of Electronics and Communication Engineering, Indian Institute of Technology Guwahati, India

Surface acoustic wave (SAW) devices based on Rayleigh wave, shear wave, love wave, acoustic plate mode (APM) wave and flexural plate wave have been explored for sensors, actuators and telecommunication applications. An interdigital transducer (IDT) is a metallic comb-like structure fabricated over piezoelectric substrate. SAWs are generated over the substrate by applying electrical signal to the ...

Simplified Finite Element Simulation of a SAW Hydrogen Sensor using COMSOL Multiphysics

N. Krishnan[1], H. Nemade[1,2], and R. Paily[2]
[1]Centre for Nanotechnology, Indian Institute of Technology Guwahati, Assam, India
[2]Department of Electronics and Communication Engineering, Indian Institute of Technology, Assam, India

In this paper, we discuss a simplified finite element method simulation of surface acoustic wave (SAW) delay line hydrogen sensor using COMSOL Multiphysics.  A delay line SAW sensor consists of a transmitting interdigital transducer (IDT) and a receiving IDT separated by a few wavelengths. In this work, the number of degrees of freedom to solve for the SAW delay line sensor model ...

Adaptive Control of Simulated Moving Bed Plants Using Comsol’s Simulink Interface

M. Fütterer
Institut für Automatisierungstechnik, Otto-von-Guericke Universität, Magdeburg, Germany

Preparative chromatography is an important separation method where the simulated moving bed (SMB) technology is an increasingly used separation process for binary mixtures. Several chromatographic columns are arranged in a ring where the feedings and drains are changed cyclically to maintain a continuous separation. For this reason, an adaptive controller is proposed to adjust the flow rates ...

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