K. Buehler, and J. W. Louw
University of Applied Sciences Offenburg, Germany
Rotating fluids are important in nature and technology. Many applications can be found in the field of meteorology and in rotating machinery. This investigation concerns the application of the swirl flow application mode in COMSOL Multiphysics to simulate nonlinear aspects of flows within spherical geometries. The results show the non-uniqueness of the supercritical solutions and interesting ...
O. Kiriyenko, W. Hergert, S. Wackerow, M. Beleites, and H. Graener
Inst. für Physik, Martin-Luther-Universität Halle-Wittenberg, Germany
Glass containing nanoparticles is a promising material for various photonic applications due to the unique optical properties mainly resulting from the strong surface plasmon resonance (SPR) of the silver nanoparticles. The characteristics of the resonance can be modified by varying size, shape and concentration of the particles. A finite element method (FEM) implemented in the software COMSOL ...
Prediction and Optimization of Surface-Enhanced Raman Scattering Geometries using COMSOL Multiphysics
I. Knorr, K. Christou, J. Meinertz, A. Selle, J. Ihlemann, and G. Marowsky
Laser-Laboratorium Göttingen e.V., Germany
Raman spectroscopy is a commonly used tool in biodiagnostics and sensor technology. Surface-enhanced Raman scattering provides high signal enhancements especially at nanostructured metallic surfaces. In this paper the electromagnetic Raman enhancement from different metallic nanostructures - including gold coated gratings, spherical and hemispherical particles - is calculated by using the finite ...
M. Darif, and N. Semmar
GREMI-UMR6606, CNRS-Universite d’Orleans, Orléans, France
A 2D transient heat conduction model was created in COMSOL Multiphysics to simulate temperature changes in material irradiated by a KrF laser beam confined on silicon’s surface. In this paper, the obtained results are shown and discussed in case of bulk Silicon. The heat source is distributed in time with ‘gate’ and ‘gaussian’ shapes. The thermal properties values ...
B. Cahill, A. Giannitsis, G. Gastrock, M. Min[1,2], and D. Beckmann
Institut für Bioprozess- und Analysenmesstechnik e.V., Heiligenstadt, Germany
 Department of Electronics, Tallinn University of Technology, Tallinn, Estonia
Electrowetting occurs with the electrical control of the surface wetting properties through the application of an electric potential. A simulation of electrowetting driven droplet dynamics is performed using the COMSOL Multiphysics level-set method for a sessile droplet and for a droplet in a microchannel. The response of the drop to a step voltage is studied. The contact angle at one edge of the ...
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 ...
Simulation of the Acoustic Environment for the Manufacture of Graded Porosity Materials by Sonication
C. Torres-Sanchez, and J. R. Corney
University of Strathclyde, United Kingdom
Many materials require functionally graded cellular microstructures whose porosity is engineered to meet specific requirements of diverse applications. It has been shown in previous work that the bubble growth rate of a polymeric foam can be influenced by the surrounding acoustic environment and, once solidified, produce a solid of graded porosity. Motivated by the desire to create a flexible ...
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 ...
D. Grondin, J. Deseure, A. Brisse, M. Zahid, and P. Ozil
Laboratoire d’Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI), Saint Martin d’Hères, France
European Institute for Energy Research (EIFER), Karlsruhe, Germany
Based on solid oxide fuel cell (SOFC) technology, the solid oxide electrolysis cell (SOEC) offers an interesting solution for mass hydrogen production. This study proposes a multiphysics model to predict the SOEC behavior. A global approach and several electrochemical kinetic equations were used for modeling. The simulated results demonstrated that a Butler-Volmer’s equation including ...
I. Hoke, C. Dahmani, T. Weyh
Heinz-Nixdorf Lehrstuhl für Medizinische Elektronik, Fakultät für Elektro-und Informationstechnik, Technische Universität München, Germany
The application of nanoparticles coupled with medical agents to brain tumors remains one of the biggest obstacles in neuro scientific research. This work explores an optimal design of an electromagnet to overcome the blood-brain barrier by means of an intensive external magnetic field gradient. It is found that the field gradients depend strongly on the design of the magnet tip. The model ...