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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.

Modeling Contaminant Diffusion in Highly Complex Rock Structures

N. Diaz[1], A. Jakob[1], L. Van Loon[1], and D. Grolimund[2]
[1]Paul Sherrer Institut NES/LES, Villigen PSI, Switzerland
[2]Paul Sherrer Institut NES/SLS, Villigen PSI, Switzerland

Opalinus clay is currently being proposed as a potential host rock for radioactive waste repository in deep geological formation. It is then important for performance assessments to understand the transport properties of such rocks. Clay materials are characterized by low hydraulic conductivities and diffusion is assumed to be the main transport mechanism. The studied rock is a complex assembly ...

Finite Element Modeling a Redox-Enzyme-Based Electrochemical Biosensor

Y. Huang[1], and A. Mason[1]
[1]Electrical and Computer Engineering, Michigan State University, East Lansing, Michigan, USA

This paper describes the modeling of an electrochemical biosensor embedded in a microfluidic channel to determine the concentration of a target biomolecule. The total amount of analyte in the sample can be calculated by integrating the analyte concentration over the duration of the peak current. The biosensor is constructed by immobilizing redox-enzyme on an interdigitated array (IDA) electrode ...

Bio-Effluents Tracing in Ventilated Aircraft Cabins

G. Petrone[1], L. Cammarata[1], and G. Cammarata[1]
[1]Department of Industrial and Mechanical Engineering, University of Catania, Catania, Italy

Ventilation and Indoor Air Quality (IAQ) are issues of very high interest, determining comfortable conditions for occupants and no-contaminated local atmosphere. The aircraft cabins are more confined and have a higher occupant density than other indoor environments such as offices or residential houses. The passengers and the crew share a closed and ventilated cabin, which brings potential risk ...

Modeling the Bacterial Clearance in Capillary Network Using Coupled Stochastic-Differential and Navier-Stokes Equations

A. Atalla[1], and A. Jeremic[1]
[1]McMaster University, Hamilton, Ontario, Canada

The capillary network is a complex-interconnected structure. A single blood cell traveling from the arteriole to a venule via a capillary bed passes through, on average, 40−100 capillary segments. The cardiovascular systems responsible of delivering blood to the tissue under sufficient pressure to exchange materials. This is a two way process, at which nutrients, Oxygen, and other ...

Explicit Dosimetry for Photodynamic Therapy; Singlet Oxygen Modeling based on Finite-Element Method

Ken Kang-Hsin Wang[1], and Timothy C. Zhu[1]
[1]Department of Radiation Oncology, School of Medicine, University of Pennsylvania, Philadelphia, PA, USA

Singlet oxygen (1O2) is the major cytotoxic agent during type-II photodynamic therapy (PDT). The production of 1O2involves the complex reactions among cancer agent, oxygen molecule, and treatment laser light. The light propagation in tumor tissue is described by the diffusion equation. In this work, an optimization routine is developed to fit the [1O2]rx profile to the simulated necrosis ...

Application of Solution Mapping to Reduce Computational Time in Actively Cooled Power Electronics

K. Lowe [1,2], and Rao V. Arimilli[2]
[1]Oak Ridge National Laboratory, Oak Ridge, TN, USA
[2]Department of Mechanical, Aerospace, and Biomedical Engineering, University of Tennessee, Knoxville, TN, USA

In some power electronic applications the available coolant temperature is close to maximum and controlling operating temperature becomes more challenging, for which new thermal management schemes must be considered. COMSOL predicts the 3D fluid behavior and 3D temperature distribution within an actively cooled power electronic structure. A solution mapping method is implemented to more ...

Modeling of snRNP Motion in the Nucleoplasm

M. Blaziková[1], J. Malínský[2], D. Stanek[3], and P. Herman[1]
[1]Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
[2]Institute of Experimental Medicine, Prague, Czech Republic
[3]Institute of Molecular Genetics, Prague, Czech Republic

Small nuclear ribonucleoprotein particles (snRNPs) are essential supramolecular complexes involved in pre-mRNA splicing, the process of post-transcriptional RNA modifications. The particles undergo complex assembly steps inside the cell nucleus in a highly dynamic compartment called the Cajal body. We have previously shown that the free diffusion model does not fully describe the snRNP motion ...

Investigation of Stability of Current Transfer to Thermionic Cathodes

M. Benilov, and M. Faria
Departamento de Física, Universidade da Madeira, Funchal, Portugal

Current transfer from high-pressure arc plasmas to thermionic cathodes may occur in a diffuse mode, when the current is distributed over the front surface of the cathode, or in a spot mode, when most of the current is localized in one or more small areas. Spectra of perturbations of 3D steady-state current transfer to thermionic cathodes of a high-pressure argon arc have been computed in the ...

Numerical Modelling of Electrophoresis Applied to Restoration of Archaeological Organic Materials

J. Caire[1], A. Bouh[1], and E. Guilminot[2]
[1]LEPMI, UMR 5631, INPG - CNRS, Saint Martin d’Hères, France
[2]EPCC, Arc'Antique, Nantes, France

Restoration of archaeological materials from oceans is a major activity of Arc’ Antique. Organic materials such as wood, tissues, leathers, papers and ceramics found in sea water are always impregnated with salts. Rinsing such archaeological objects with pure water to extract the salts takes too long, so electrophoresis was used to improve the salt extraction. The objective of this ...

Simulation of Current Collector Corrosion Effects on the Efficiency of Molten Carbonate Fuel Cells

I. Sgura[1], F. Zarcone[2], and B. Bozzini[2]
[1]Dipartimento di Matematica, Università del Salento, Lecce, Italy
[2]Brindisi Fuel Cell Durability Laboratory, Facoltà di Ingegneria Industriale, Università del Salento, Brindisi, Italy

Corrosion and contact ohmic resistance of the stainless steel current collectors in molten carbonates is one of the greatest obstacles to widespread application of molten carbonate fuel cells (MCFC). We simulate the variation of material parameters values, accounting for the impact of corrosion of the metallic current collectors on the performance of the porous cathode. Furthermore, we couple a ...

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