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.

EM Simulation of a Low-Pass Filter Based on a Microstrip Defected Ground Structure

J.E. Rayas-Sánchez[1], J. Aguilar-Torrentera[1], Z. Brito-Brito[1], J.C. Cervantes-González[2], C.A. López[2]
[1]Universidad Jesuita de Guadalajara, Tlaquepaque, Jalisco, Mexico
[2]Intel Guadalajara Design Center, Tlaquepaque, Jalisco, Mexico

We perform EM simulations of a low-pass microstrip filter consisting of a cross-junction open stub and two unit sections implemented as defected ground structures (DGS). The defect introduced by unit sections corresponds to an etched lattice on the copper backside ground plane. The filter presents wide and deep attenuation characteristics in the stopband. Different model implementations were ...

Analysis of Superheater Tubes with Mutual Irradiation as Applied to a Solar Receiver Steam Generator

N. Lemcoff[1], S. Wyatt[2]
[1]Rensselaer Polytechnic Institute, Hartford, CT, USA
[2]Alstom Power, Windsor, CT, USA

The objective of this paper is to analyze the temperature variations within a superheater tube of a solar receiver steam generator. The tube is heated by concentrated, collimated solar irradiation with major cooling by an internal steam flow. The influence of heat loss by radiation, internal convection, and conduction are considered. Analytical models are obtained for an isolated tube, and the ...

Modeling a Combined Photovoltaic-Thermal Panel

E. Gutierrez-Miravete[1], B. Fontenault[2]
[1]Rensselaer Polytechnic Institute, Hartford, CT, USA
[2]General Dynamics-Electric Boat, Groton, CT, USA

A novel combined photovoltaic-thermal panel can simultaneously increase the conversion efficiency of the PV cell and utilize some of the excess thermal energy created by the conversion process (see Figure 1). The Conjugate Heat Transfer physics in COMSOL was used to create a two-dimensional, steady state model of such a combined photovoltaic cell-thermal panel. Figure 2 shows a magnified view of ...

Orientation of Piezoelectric Crystals and Acoustic Wave Propagation

G. Zhang[1]
[1]Clemson University, Clemson, SC, USA

Surface acoustic wave (SAW) devices are commonly used as wireless filters, resonators, and sensors. The confinement of acoustic energy near the surface of a piezoelectric substrate in a SAW sensor makes it highly sensitive for discerning surface perturbation. As sensors, SAW devices have the potential to provide a high-performance sensing platform with capabilities of remote and high-temperature ...

A COMSOL Model of Damage Evolution Due to High Energy Laser Irradiation of Partially Absorptive Materials

P. Joyce[1], J. Radice[1], A. Tresansky[1], J. Watkins[1]
[1]United States Naval Academy, Annapolis, MD, USA

In this paper we present a transient numerical model of the heat transfer and thermochemical damage evolution in an IR translucent material using COMSOL Multiphysics. The model is evaluated using literature supplied and experimentally determined material properties for carbon black laden PMMA (polymethyl-methacrylate). This variant of PMMA was chosen because it is homogeneous, isotropic, and the ...

Poroelastic Models of Stress Diffusion and Fault Re-Activation in Underground Injection

R. Nopper[1], J. Clark[2], C. Miller[1]
[1]DuPont Company, Wilmington, DE, USA
[2]DuPont Company, Beaumont, TX, USA

Stress and failure in the earth have long been observed to couple to hydrogeology. Poroelastic models, introduced by soil scientists, can account for strong two-way coupling between porous crustal rock formations and their pore fluids. Current efforts to provide new energy resources (water injection in EGS, enhanced oil recovery) and to reduce pollution (CO2 sequestration, deepwell disposal) ...

A Study of the Effects of Mounting Supports, and Dissipation on a Piezoelectric Quartz Double-Ended Tuning Fork Gyroscope

G. Choi[1], Y. Yong[1]
[1]Rutgers University, New Brunswick, NJ, USA

A COMSOL model of a piezoelectric quartz double ended tuning fork gyroscope was implemented. The gyroscope has two detection modes; the first mode detects the angular velocity about a z-axis perpendicular to the tuning fork plane (x-y plane), while the second mode detects the angular velocity about a y-axis that is the longitudinal axis along the length of the tuning fork. Eigenfrequency ...

Parametric Study of Heavy Oil Recovery by Electromagnetic Heating on a Horizontal Well

M. Liu[1], G. Zhao[1]
[1]University of Regina, Regina, SK, Canada

This study presents a oil-gas two-phase linear flow EMH model using COMSOL Multiphysics simulator. Special attention is focused on reservoirs with characteristics for which steam injection is not attractive or feasible such as low permeability, thin-zone, and extra-heavy oil reservoirs. Comparisons showed that cumulative oil production obtained by EM heating is better than what is achieved by a ...

Simulation of Microwave Heating of Porous Media Coupled with Heat, Mass and Momentum Transfer

J. Subbiah[1], J. Chen[1], K. Pitchai[1], S. Birla[1], D. Jones[1]
[1]University of Nebraska, Lincoln, NE, USA

A microwave heating model coupled with heat, mass, and momentum transfer is needed to fully understand the microwave heating process. In this study a comprehensive 3D model was developed for studying the interaction of microwave with the food. The model includes physics of Maxwell’s electromagnetic heating, Fourier’s heat transfer, Darcy’s momentum transfer, mass conservations of water and ...

Early Stage Melt Ejection in Laser Percussion Drilling

T. Eppes[1]
[1]University of Hartford, Hartford, CT, USA

Laser percussion drilling is widely used in the aerospace industry to produce cooling holes in jet engine components. This process is a thermal, contact-free process which involves firing a sequence of focused optical pulses onto a target material [1-4]. During each optical pulse, the central portion of the target area heats to a liquid then vapor state where the expanding gas produces a recoil ...