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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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Analysis of D-Shaped Toroidal Superconductive Coils for Medium Size Fusion Experiment Facility

V. Cocilovo [1],
[1] ENEA Frascati Research Center, Frascati, Italy

The research in magnetic confinement fusion is carried out through electromagnetic machines, with a toroidal geometry, where a hot plasma of heavy hydrogen isotopes (deuterium and tritium) is contained in a vacuum vessel. Due to the very high temperatures reached by the plasma, strong ... Read More

Simulation of Vector Mode Grating Coupler Interfaces for Integrated Optics

C. T. Nadovich [1],
[1] Lafayette College, Easton, PA, USA

The use of grating couplers to couple conventionally phased and polarized light near vertically in and out of optical slab or film waveguides [1] represents an attractive method to interface optical fiber to photonic ICs. Previously developed grating coupler designs use transversely ... Read More

Calculating Impedance of a Common Mode Choke in High Frequency Regime

J. Lin [1],
[1] Pitotech Co. Ltd., Changhua City, Taiwan

Common mode chokes are good EMI filters in electronic power systems [1]. For such devices, values for their impedance are critical to their performances as noise filters. In this study, a two-step finite element approach is employed to study the impedance variations of a ferrite-core ... Read More

Modeling Microwave Chiral Material Based On Crank Resonators Arrays Using COMSOL Multiphysics

J. Muñoz[1], G.J. Molina [1], M.M. Rojo[1]
[1]Dpto. Electromanetismo y Electrónica, Facultad de Química, Universidad de Murcia, Campus Espinardo, Murcia, Spain

Electromagnetic metamaterials present exotic and unusual properties hardly to be found in nature with many potential applications. They are usually built by distributing small resonant structures in periodical lattices. If the structure has chiral symmetry, the medium is called chiral ... Read More

Enhanced Spontaneous Emission in Plasmonic Nanostructures

Jun Yi [1], Song-Yuan Ding [2],
[1] State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
[2] Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, China

Spontaneous emission -- an electron in an excited state of an emitter spontaneously decays to another state with lower energy -- plays an important role in determining the performance of light-emitting diodes, fluorescent dyes, colorants, solar cells, etc. The efficiency of spontaneous ... Read More

Simulation of a Rotary Magnetorheological Damper

D. Harder [1], L. Fromme [1], R. Naumann [2],
[1] University of Applied Sciences Bielefeld, Department of Engineering Sciences and Mathematics, Bielefeld, Germany
[2] University of Applied Sciences Bielefeld, ISyM – Institute of System Dynamics and Mechatronics, Bielefeld, Germany

This paper presents a simulation model of a rotary damper filled with a magnetorheological fluid (MRF). The most important characteristic of the MRF is the variable viscosity, which can be controlled by an external magnetic field. In the simulation model, the fluid is described as a ... Read More

Scan Angle Stability of a Second-Order Plasma-Switched Frequency Selective Surface

L. W. Cross[1], M. J. Almalkawi[2]
[1]Imaging Systems Technology, Toledo, OH, USA
[2]EECS Department, College of Engineering, University of Toledo, Toledo, OH, USA

Large-area, light-weight electromagnetic protection (EP) structures are needed to protect sensitive microwave sensors and communications systems from high-power microwave (HPM) and electromagnetic pulse (EMP) threats. This paper presents the use of COMSOL Multiphysics® for ... Read More

Surface Plasmon Resonance

J. Crompton[1], S. Yushanov[1], L.T. Gritter[1], K.C. Koppenhoefer[1]
[1]AltaSim Technologies, Columbus, OH, USA

The resonance conditions for surface plasmons are influenced by the type and amount of material on a surface. Full insight into surface plasmon resonance requires quantum mechanics considerations. However, it can be also described in terms of classical electromagnetic theory by ... Read More

Numerical study of the free surface in silicon melting by Cold crucible technique

S.Al Radi¹, R.Ernst, H.Abouchi, E.Favre and K. Zaidat¹
¹Grenoble Alpes University, SIMAP, St Martin d'Hères, France

Currently in the semiconductor industry more than 80% of silicon crystal are grown by the Czochralski (Cz) method. In this method, fused silica (SiO2) crucibles and graphite heaters are used inside furnaces. The surface of the crucibles, which are in contact with the molten silicon, is ... Read More

Comparison and Optimization of MRF Dampers Performance with Different Piston Coil Winding Orientation using COMSOL Multiphysics®

P. Singh[1], S. Panda[2]
[1]Indian Institute of Technology (BHU), Varanasi, India
[2]IIT (BHU), Varanasi, India

Undesirable shocks and vibrations are a noteworthy issue in numerous human exercises and domains. Therefore, various damping techniques are used to minimise vibrations, can be classified as active, Semi-active and passive damping. The development of semi-actively controlled ... Read More

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