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.

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 ...

Design of an Electrodynamically Actuated Microvalve Using COMSOL Multiphysics® and MATLAB®

M. Williams, J. Zito, J. Agashe, A. Sopeju, and D. Arnold
University of Florida, Gainesville, USA

This paper describes the design of a normally closed, electrodynamic microvalve.  Magnetic forces between a permanent magnet in the valve cover and a soft magnet in the valve seat hold the valve closed.  The combination of electrodynamic actuation and a mechanical restoring spring are used to open the valve.  A device model and a design optimization strategy using COMSOL ...

Nonlinear Ferrohydrodynamics of Magnetic Fluids

Markus Zahn
Massachusetts Institute of Technology, Cambridge, MA, USA

Markus Zahn received all his education at MIT, was a professor in the Department of Electrical Engineering at the University of Florida, Gainesville from 1970-1980, and then joined the MIT Department of Electrical Engineering and Computer Science faculty in 1980. He works in the Laboratory for Eelectromagnetic and Eelectronic Systems, in the MIT High Voltage Research Laboratory, is the Director ...

An Analysis of Plunger Temperature during Glass Parison Pressing

P. Ngankeu[1], and E. Gutierrez-Miravete[2]

[1]EMHART Glass Research Inc, Windsor, CT, USA
[2]Rensselaer at Hartford, Hartford, CT, USA

The press and blow (P&B) process is widely used to produce glass containers. While the P&B process has demonstrated to be capable of reducing container weight by as much as 33%, it can also induce the formation of micro-checks that weaken container strength. This paper presents a model of the heat transfer due to the intermittent contact of glass with the plunger during several pressing ...

Modeling of Shrinkage Behavior in Cement Paste Using Thermal-structural Interaction

T. Chen[1], and P.G. Ifju[1]

[1]University of Florida, Gainesville, Florida, USA

This paper describes using thermal-structural interaction to model the shrinkage behavior in cement paste under drying. An inverse method of combining the finite element analysis and the least-squares method is implemented to fit experimentally determined shrinkage in order to obtain material properties from the complex geometry used in the tests. The finite element model is created using COMSOL ...

Numerical Modeling of Falling Aluminum Particle Oxidation in Air

A. Davidy
Israel Military Industry, Ramat-Hasharon, Israel

Because of its high enthalpy of combustion, aluminum has been added to energetic materials. In this paper, a two dimension thermal model is developed and assessed to describe the interrelated processes of Aluminum particle oxidation by using the software COMSOL Multiphysics. The thermal model consists of thermal radiation, forced convection and thermal conduction and oxygen diffusion. It is ...

Physical and FEM Simulation of Microprobe Insertion into Brain Tissue

A. Eed Olamat, U. Hofmann, B. Pohl, and N. Nkemasong
University of Lübeck, Institute for Signal Processing, Lübeck, Germany

In order to investigate the implantation of microprobes into brain tissue, we developed a finite-element and a physical model to replace real biological tissue for mechanical testing. Penetrating forces of a tungsten indenter into a layered structure was investigated with different indentation speeds. Numerical and physical model are in good correspondence to each other and reproduce measured ...

Wind Evaporation On Wetted Surfaces Under Uncertainty Conditions

J.M. Gozalvez-Zafrilla, M.C. Leon-Hidalgo, J. Lora-Garcia, A. Santafe-Moros, and J.C. Garcia-Diaz
Universidad Politecnica de Valencia, Valencia, Spain

Brine disposal from desalination plants placed in inland areas far from sea is an important problem. Evaporation ponds can be used for reducing the waste to solid state but they require huge amounts of land. Evaporation using arrays of wet surfaces can minimize the land requirements. One characteristic of the methods based on natural evaporation is the uncertainty associated to the influent ...

Multiphysics Modeling of Nanoparticle Detection - Current Status and Collaboration Sought

D. Krizaj[1], I. Iskra[2], Z. Topcagic[1], and M. Remskar[2]
[1]University of Ljubljana, Faculty of Electrical Engineering, Ljubljana, Slovenia
[2]Institut Jozef Stefan, Ljubljana, Slovenia

We are developing nanoparticle detector for airborn particles. The detection principle is based on condensation of nanoparticles forming micron sized water droplets and detection of the droplets by a capacitive type nanodetector. We have successfully performed some experimental evaluations of the detection principle and are in the stage of optimization of several parts of the system. As ...

Comparison of 2D Conduction Models for Vertical Ground Coupled Heat Exchangers

A. Priarone[1], and S. Lazzari[2]
[1]DIPTEM-TEC, Università di Genova, Genova, Italia; Corresponding Author:
[2]DIENCA, Università di Bologna, Bologna, Italia

The effect of the infinite length approximation on evaluating the temperature of the surface of Borehole Heat Exchangers is determined by means of COMSOL Multiphysics. In detail, two 2D models of a BHE are compared: in the first model, the domain is represented by a cross-section of the geometry, while in the second model, it is represented by an axial-section of the geometry and, thus, the BHE ...

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