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See How Multiphysics Simulation Is Used in Research and Development

Engineers, researchers, and scientists across industries use multiphysics simulation to research and develop innovative product designs and processes. Find inspiration in technical papers and presentations they have presented at the COMSOL Conference. Browse the selection below or use the Quick Search tool to find a specific presentation or filter by application area.

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Modeling of Resonant Optical Trapping in a 2D Photonic Crystal Cavity

U.P. Dharanipathy[1], N. Descharmes[1], Z. Diao[1], M. Tonin[1], R. Houdré[1]
[1]Institut de Physique de la Matière Condensée, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

Photonic crystals (PhC) are optical nanostructures that are widely known for their strong spatial and temporal confinement of electromagnetic radiation. Here, we study the resonant optical trapping of a single nanoparticle within a hollow circular photonic crystal cavity. The ... Read More

Simulation of Radiation Dose from Diagnostic X-ray Beams

H. Chen-Mayer[1], R. E. Tosh[1]
[1]NIST, Gaithersburg, MD, USA

Direct realization of absorbed dose to water in diagnostic radiation via calorimetric methods poses many challenges since the thermal signal of interest may be less than a few microKelvin. In actual biological systems or structures, like the lung, there is the additional complication of ... Read More

Design of MEMS based Polymer Microphone for Hearing Aid Application

V. S. Nagaraja[1], Ramanuja H. S.[1], Deepak K[1], S. L. Pinjare[1]
[1]Electronics and Communication Engineering, Nitte Meenakshi Institute of Technology, Bangalore, Karnataka, India

In this work, a MEMS based condenser microphone [1,2] using Polyimide as the diaphragm has been designed. The microphone structure has a backplate placed on top of the diaphragm. The backplate and the diaphragm are made up of polyimide. The two polyimide plates are separated by air gap ... Read More

Novel Simulation of a Voltage-Driven Electro-Thermo-Mechanical MEMS Self-Oscillator

S. Ouenzerfi [1,2,3], H.A.C. Tilmans [2], S. El-Borgi[3,4], X. Rottenberg [2]
[1] KACST-Intel Consortium Center of Excellence in Nano-manufacturing Applications (CENA), Riyadh, KSA
[2] IMEC, Leuven, Belgium
[3] Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School, University of Carthage, La Marsa, Tunesia
[4] Texas A&M University at Qatar, Mechanical Engineering Program, Engineering Building, Doha, Qatar

This paper presents the modeling and simulation of electro-thermo-mechanical self-oscillators, an emerging type of M/NEMS-enabled timing devices in which sustaining electronic amplifiers are not required for their operation. Indeed, they realize amplification in the mechanical domain and ... Read More

Use of Simulation in the Development of Next-generation Measurement Standards for Radiation Dosimetry

R. E. Tosh[1], H. Chen-Mayer[1]
[1]NIST, Gaithersburg, MD, USA

Calibration of field instruments used in radiation treatment clinics is currently traceable to NIST primary standards via protocols involving static, flat-field radiation beams. By contrast, radiation beams prescribed for treating cancer incorporate temporal and spatial modulation ... Read More

Efficient, Selective Piezoeletric Wave Transduction Using Interdigitated Electrodes

H. T. D. Grigg[1], T. H. Hanley[1], B. J. Gallacher[1]
[1]Newcastle University, Newcastle, Tyne and Wear, UK

This work enunciates the principles of SAW design from a physical perspective, examining the standard engineering modelling assumptions in some detail. An integral form analytical expression based on 2D elastic isotropic theory is validated against a COMSOL Multiphysics® simulation, ... Read More

Development and Optimization of a Microfluidic Device for Magnetic Field Induced Cell Separation

L. Helmich[1], A. Hütten[1]
[1]Bielefeld University, Bielefeld, Germany

Besides conventional laboratory analysis methods, so called micro-total-analysis devices (µTAS) have gained great interest during the last decades. In this work we demonstrate a mechanism for the separation and selection of medical samples that can be applied within these µTAS devices. ... Read More

Assessing COMSOL Performances on Typical Problems Faced by Turbo-Generator Manufacturers

E.A. Badea[1], J. Oesterheld[1], S. Friedel[2], M. Olsson[3]
[1]Alstom Schweiz, Birr, Switzerland
[2]COMSOL, Zürich, Switzerland
[3]COMSOL, Stockholm, Sweden

Multiphysics processes manifest in turbo-generators due to the leakage electromagnetic field of the stator and rotor end winding and its associated effects at machine frontal end. Such processes are a compilation of coupled phenomena having different electromagnetic, thermal, fluid flow ... Read More

Numerical Study of Exciton States of Core?shell CdTe/CdS Nanotetrapods by using COMSOL Multiphysics

Y. Yao?and K. Sakoda
National Institute for Materials Science
University of Tsukuba
Japan

This paper showed: * The electronic states of core-shell tetrapod with various shell thickness were calculated. Lowest 20 electron and hole wave functions have A1 or T2 symmetry. * At t=1.2 nm, the carriers separation is not serious, core-shell tetrapod is not apparent type II ... Read More

Multiphysics Modeling Solutions for Advanced Vehicle Research & Development

Ercan Dede currently works as a Principal Scientist for the Toyota Research Institute of North America, where his research involves the multiphysics simulation and optimization of electromechanical systems for advanced vehicle applications. Dr. Dede received his Ph.D. and B.S., ... Read More

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