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.

Numerical Aspects of the Implementation of Artificial Boundary Conditions for Laminar Fluid-Structure Interactions

C. Boeckle[1], P. Wittwer[1]
[1]University of Geneva, Geneva, Switzerland

We discuss the implementation of artificial boundary conditions for stationary Navier-Stokes flows past bodies in the half-plane, for a range of low Reynolds numbers. When truncating the half-plane to a finite domain for numerical purposes, artificial boundaries appear. We present an explicit Dirichlet condition for the velocity at these boundaries in terms of an asymptotic expansion for the ...

Ventilation System of a Microwave Assisted Drying Kiln

A.-G. Ghiaus[1], M.-A. Istrate[1], A. Georgescu[1]
[1]Technical University of Civil Engineering, Bucharest, Romania

The paper presents the analysis and optimization of the ventilation system inside of a drying lumber kiln. As with any part of the manufacturing process, improper drying techniques cause quality degradation and considerable amount of energy loose. The improvement and optimization of air distribution systems in drying kilns contributes to the preservation of the wood quality. The performance of ...

Flare System Pressure Drop Calculations Using COMSOL

K. Alhazza[1], B. Albusairi[1], H. Kamal[1], H.M.S. Lababiedi[1], A.A. Abbas[2]
[1]Kuwait University, Kuwait City, Kuwait
[2]Petrochemical Industries Company, Kuwait City, Kuwait

COMSOL Multiphysics has been used to validate and check the design of a header transporting ammonia gases released from pressure safety valves (PSVs) to the tip of the flare. The header is part of a dedicated flaring system to contain emissions from ammonia storage tanks. The two main challenges are the low relief pressure and high capacity of the system. Another difficulty is the high relief ...

CFD-based Optimal Design of Electrolytic Microreactors using Response Surface Method

O. Tonomura, M. Tsujimoto, M. Kano, and S. Hasebe
Kyoto University, Kyoto, Japan

Accelerating mass transfer is the key for obtaining higher product yield in an electrolytic microreactor (EMR). Through CFD simulation, the effectiveness of EMR having grooved electrode (EMR-GE) is shown in this work. In addition, a systematic design method is developed. Response surface method (RSM) is introduced into the CFD-based optimal design of EMR-GE. It is shown that the combination of ...

Finite Element Modelling For Optimizing A Hyphenated Rheometer/Calorimeter

C. Block[1], B. Van Mele[1], and V. Janssens[2], P. Van Puyvelde[2], and G. Van Assche[1]
[1]Vrije Universiteit Brussel, Physical Chemistry and Polymer Science, Brussels, Belgium
[2]Catholic University of Leuven, Lab of Applied Rheology and Polymer Technology, Heverlee, Belgium

COMSOL is used for optimization of the design of a novel analytical technique, RheoDSC, which combines a rheological and a calorimetric measurement on one sample. A rheological experiment is performed on a sample positioned on a DSC sensor in a DSC instrument. DSC is used to study transition enthalpies and heat capacity in isothermal and non-isothermal conditions. The working principle of a ...

Fluid Memory for Particles in 2D Brownian Motion

S. Wolf, and J. Czerwinska
ARTORG Center
University of Bern
Bern, Switzerland

Thermal fluctuations of microparticles are an important way of transport in biological cells. While the fluid properties, such as viscosity, cannot always be directly measured, the random path of a microparticle can be observed under microscope. The relation between the diffusion and the fluid viscosity is analytically well described for spherical particles. Therefore, we have simulated and ...

Multiscale Hemodynamic Modeling of the Intrarenal Circulation

K. M'rabet Bensalah[1], J. Czerwinska[2], D. Uehlinger[3], R. Kalicki[3]
[1]University of Bern, Faculty of Medicine, Bern, Switzerland
[2]ARTORG Center for Biomedical Egineering Research, Artificial Kidney Research, Bern, Switzerland
[3]University Hospital of Bern, Department of Nephrology and Hypertension, Bern, Switzerland

In silico research is gaining interest in the medical field. Simulating the renal circulation is a very challenging and exciting task due to the high morphological and functional complexity of this system. In numerous renal diseases the underlying pathomechanism as well as the primary and secondary damages, concern the vascular system. A better understanding of the local hemodynamics will ...

Modeling and 2-D FE-simulation of Vortex Ripples Using a Three-phase Mixture Approach

T. Reisner[1], H. Steeb[1], and J. Renner[2]
[1]Institute of Mechanics - Continuum Mechanics, Ruhr-University Bochum, Bochum, Germany
[2]Institute of Geology, Mineralogy and Geophysics, Ruhr-University Bochum, Bochum, Germany

A new continuum-mechanical model for the study of sediment erosion, transport and deposition was developed using a three-phase mixture approach. It differs from existing two-phase models in that the sediment is modeled as two different phases, rigid sediment bed and mobile particles, instead of one phase. The model is currently implemented into Comsol Multiphysics using the Mixture Model and ...

Multiphysics Modeling of Magnetorheological Dampers

D. Case, B. Taheri, and E. Richer
Southern Methodist University
Dallas, TX

A magnetorheological fluid consists of a suspension of microscopic magnetizable particles in a non-magnetic carrier medium. When a magnetic field is produced in the same space, the microscopic particles suspended in the fluid become oriented and form chains along the magnetic flux lines, changing the fluid’s rheology. This project uses COMSOL Multiphysics to examine the magnetic flux lines ...

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