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.

Periodically Poled Lithium Niobate Waveguides for Quantum Frequency Conversion - new

J. Toney[1], J. Retz[1], V. Stenger[1], A. Pollick[1], P. Pontius[1], S. Sriram[1]
[1]SRICO, Inc., Columbus, OH, USA

This paper presents techniques for modeling annealed proton exchange (APE) and reverse proton exchange (RPE) waveguides in periodically poled lithium niobate for application to optical frequency conversion. A combination of time-dependent diffusion modeling and electromagnetic mode analysis using the RF module are used to predict the relationship between the poling period and the second harmonic ...

Key-Holes Magnetron Design and Multiphysics Simulation

A. Leggieri[1], F. Di Paolo[1], D. Passi[1]
[1]Univeristy of Rome "Tor Vergata" - Department of Electronic Engineering, Rome, Italy

This paper describes the design and characterization of an 8 slots resonant cavity Magnetron, which undergoes thermal-structural effects due to cathode heating. The proposed study involves Thermal Stress, Eigen-frequency and Particle Tracing analysis based on COMSOL Multiphysics®. Magnetrons are well known and often utilized High Power Radiofrequency Vacuum Tube oscillators. In order to ...

Radio Frequency Resonator for Continuous Monitoring of Microfluidic Droplet Size Dispersity

D. Conchouso [1], G. Mckerricher [1], D. Castro [1], A. Arevalo [1], I. G. Foulds [2]
[1] King Abdullah University of Science and Technology, Thuwal, Makkah, Saudi Arabia
[2] School of Engineering, University of British Columbia - Okanagan, Vancouver, BC, Canada

Parallelization of droplet microfluidics is a challenging task because of the complex fluid mechanics coupling between parallel devices. Failure of few droplet generators can influence the size distribution of the final product and the correct operation of the neighbor devices. One of the typical causes of failure is channel clogging, in which one of the phases cannot flow through the ...

Commercial Special Fibers for Sensing Applications

G. Latha[1], P. Nair[1]
[1]SSN College of Engineering, Chennai, Tamil Nadu, India

In a solid core PCF, structural parameters and the number of rings in the cladding region decide confinement losses, dispersion coefficients as well as bending losses. This paper evaluates some of commercially available solid core photonic crystal fibers. The dispersion coefficients and sensitivity of these fibers are estimated using COMSOL Multiphysics®, and compared with the theoretical values ...

Studying Crosstalk Trends for Signal Integrity on Interconnects using Finite Element Modeling

J. Grover[1], Dr. A. Gupta[1]
[1]Birla Institute of Technology and Science, Pilani-Pilani Campus,Rajasthan ,India

In high-speed digital design, strong electromagnetic coupling exists between adjacent transmission lines. This manifests itself in the form of crosstalk voltage induced on either line. Crosstalk is modeled in terms of capacitance and inductance matrices which are extracted using COMSOL Multiphysics®. Further, trends of crosstalk are observed with variations in dielectric constant of substrate, ...

Edge Element and Second-Order Nodal Analysis for Arbitrary Shaped Waveguides

H. Arab[1], F. Afshar[2], C. Akyel[1]
[1]École Polytechnique de Montréal, Montréal, QC, Canada
[2]Department of Electrical and Computer Engineering, McGill University, Montréal, QC, Canada

In this project a two dimensional second order nodal and linear edge elements programming model for homogeneous waveguide is developed and simulated in MATLAB® software Environment. The objective is to reduce or eliminate spurious solutions and to cater for any arbitrarily shaped waveguides using triangular edge elements. The formulation is developed using the E-Field and to make use of the ...

A COMSOL-based 2D Self-Consistent Microwave Plasma Model

A. Berthelot [1], A. Bogaerts [1],
[1] PLASMANT Group, University of Antwerp, Belgium

In this paper, we present a 2D axisymmetric self-consistent plasma fluid model for microwave plasmas operating in argon. The model was developed using COMSOL Multiphysics and its Plasma Module. Plasma, flow, heat and electromagnetic equations solved self-consistently. The effect of the pressure on the plasma parameters is studied over a wide range of pressures going from 10 mbar to ...

A Novel Mechanical Stress Measurement Method Applied to Wind Turbine Rotor Blades

A.H. Hegab[1], J.P. Kaerst[1]
[1]HAWK, University of Applied Sciences and Arts, Goettingen, Germany

Rotor blades for wind turbines are made of GFRP material. They have to be designed to withstand wind and weather over their approximately 20 years of lifetime. The ability to monitor the mechanical stress is crucial in order to reduce maintenance costs and to maximize operational availability. This paper presents the combination of SPICE® and COMSOL Multiphysics®, in order to reduce ...

Modeling Microwave Heating During Batch Processing of a Liquid Sample in a Single Mode Cavity

S. Curet [1], F. Bellicanta Begnini [1], O. Rouaud [1], L. Boillereaux [1]
[1] L’UNAM Université, ONIRIS, CNRS, GEPEA, Nantes, France

The use of microwaves for heating purposes of dielectric materials is encountered in many industrial applications (food processing, chemistry, material engineering and medical applications). In most of these thermal applications, the prediction of the temperature evolution within the processed materials is of primary interest in order to optimize the treatment (Chandrasekaran et al., 2013). In ...

Electromagnetic Wave Guidance Mechanisms in Photonic Crystal Fibers

S. K. Bhadra [1], T. Biswas [1], S. Majumder [1],
[1]CSIR-Central Glass and Ceramic Research Institute, Jadavpur, Kolkata, India

We present the utilization RF module of COMSOL Multiphysics® for understanding three different types of wave guidance mechanisms in photonic crystal fibers (PCFs), like modified total internal reflection, Bragg’s reflection and resonant trapping of defect mode at Dirac frequency. Effective refractive indices of the core and cladding are calculated using mode analysis study to verify total ...