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.

Variable Capacitance And Pull-In Voltage Analysis Of Electrically Actuated Meander-Suspended Superconducting MEMS

N. AlCheikh[1], P. Xavier[1], J.M. Duchamp[1], C.H. Boucher[2], and K. Schuster[2]
[1]Institute of Microelectronics, Electromagnetism and Photonics (IMEP-LAHC), Minatec, Grenoble, France
[2]Institute of Millimetric Radio Astronomy (IRAM), Grenoble, France

Variable capacitors between the fF and pF range are very interesting for high frequency applications like variable filters, resonators, etc. For radio astronomy applications variable capacitors, realized by electrostatically actuated, micromechanical Meanders-suspended bridges (MEMS) made of superconducting Niobium, have been measured to find C(V). A non plane capacitance behavior have been ...

Efficient Generation of Surface Plasmon Polaritons with Asymmetric Nano-structures

J. Chen
Peking University
China

This paper covers the following: * All-Optical Light Modulation of surface plasmon polaritons (SPPs) is achieved using asymmetric single nanoslits. A high on/off switching ratio of >20 dB and phase variation of >? were observed with the device lateral dimension of only about 2 ?m. * Efficient unidirectional excitation of SPP as well as beam splitting are achieved using the dielectric–film ...

Analysis of Electroosmotic Flow of Power-law Fluids in a Microchannel(1D)

K. SriNithin[1]
[1]IIT Kharagpur, Kharagpur, West Bengal, India

Electroosmotic flow of power-law fluids in a slit channel(1D) is analyzed. The governing equations are the Poisson–Boltzmann equation, the Cauchy momentum equation, Generalized Smoluchowski equation and the continuity equation are used to get shear stress, dynamic viscosity, and velocity distribution. Simulations are performed to examine the effects of ?H, flow behavior index, double layer ...

DNA Interactions in Crowded Nanopores - new

K. Misiunas[1], N. Laohakunakorn[1], S. Ghosal[2], O. Otto[1], U. F. Keyser[1]
[1]University of Cambridge, Cambridge, UK
[2]Northwestern University, Evanston, IL, USA

The motion of DNA in crowded environments is a common theme in physics and biology. Examples include gel electrophoresis and the self-interaction of DNA within cells and viral capsids. Here we study the interaction of multiple DNA molecules within a nanopore by tethering the DNA to a bead held in a laser optical trap to produce a "molecular tug-of-war". We measure this tether force as a function ...

Design and Simulation of a MEMS-Based Flow Sensor Using COMSOL Multiphysics® Software

P. Saikumar [1], Z. C. Alex [1], D. Rajapan [2],
[1] VIT University, Vellore, Tamilnadu, India.
[2] National Institute of Ocean Technology (NIOT), Pallikaranai, Chennai, Tamilnadu, India

A flow sensor based on calorimetric principle is designed using COMSOL Multiphysics® software. The sensor is capable of measuring the velocity from 0 to 1 m/s with a resolution of 0.001m/s. The system works with intrusive type mechanism in which the fluid flows across the sensor and interacts with heating element and sensing unit. Temperature gradient measured across the inlet and outlet sensing ...

Phasefield Modeling of Ferroelectric Materials

Marc Kamlah
Head of the Mechanics of Materials Department, Forschungszentrum Karlsruhe, Germany

Outline of presentation: theory of phase-field modeling of ferroelectric materials parameter identification in free energy density finite element implementation: PDE form weak form periodic boundary conditions: electrical mechanical domain configurations intrinsic and extrinsic contributions to small signal properties ---------------------------------- Keynote speaker's biography ...

Study of Fluid and Mass Adsorption Model in the QCM-D Sensor for Characterization of Biomolecular Interaction

H.J. Kwon[1], C.K. Bradfield[1], B.T. Dodge[1], and G.S. Agoki[1]
[1]Department of Engineering and Computer Science, Andrews University, Berrien Springs, Michigan, USA

Increasing attention has been paid to application of the quartz crystal microbalance with dissipation (QCM-D) sensor for monitoring biomolecular interactions. This paper focuses on a practical application of protein-protein binding affinity measurement at low concentrations and minimal sample sizes (50-200 μl of 20-200 nM), which results in low signal measurement. A model simulating fluid ...

Powerful automation and optimization methods for Material- and Process analysis with COMSOL Multiphysics and Matlab

T. Frommelt
SGL Group, Technology & Innovation, Meitingen, Germany

Thomas Frommelt received his PhD in physics in 2007 from the University of Augsburg for experimental work and simulation analysis on acoustically driven microfluidic mixing. In 2008, he joined the SGL Group and introduced COMSOL Multiphysics as the tool for flexible equation based modelling. Since then, he has focused on carbon material and process simulation employing methods of optimization ...

3D Stationary and Temporal Electro-Thermal Simulations of Metal Oxide Gas Sensor Based on a High Temperature and Low Power Consumption Micro-Heater Structure

N. Dufour[1], C. Wartelle[2], P. Menini[1]
[1]LAAS-CNRS, Toulouse, France
[2]Renault, Guyancourt, France

The aim of this work was to simulate the electro-thermal behavior of a micro-hotplate used as a gas sensor, in order to compare the obtained results with a real structure. The structure has been designed in 3D and a stationary and a temporal study has been realized.

Nanoscale Structure Design in EM Fields Using COMSOL Multiphysics

J. Yoo[1], H. Soh[2], J. Choi[3], S. Song[4]
[1]Department of Mechanical Engineering, Yonsei University, Korea
[2]Hyundai Motor Co., Korea
[3]Samsung Electronics Co., Ltd., Korea
[4]Mando Co., Korea

Nanoscale structural analysis and design is presented. All the simulations are carried out using a finite element solver and optimization is performed using parameter and topology optimization schemes. It is concluded that COMSOL is effective for analysis and design of nanoscale structure design in electromagnetic field and it may be combined with several optimization methods to improve system ...