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.

Interfacing Continuum and Discrete Methods: Convective Diffusion of Microparticles and Chemical Species in Microsystems

J. Berthier
CEA-LETI, Department of Biotechnology, Grenoble, France

Convective transport of macromolecules or micro and nanoparticles in microsystems are usually predicted by solving the Navier Stokes equations for the carrier fluid and a concentration equation for the diffusing species. In the case of isolated particles or complicated geometries with extremely small apertures or microporous material, the concentration equation maybe replaced by a Monte Carlo ...

COMSOL Modeling of a Submarine Geothermal Chimney

M. Suárez [1], and F. Samaniego [2]
[1]Faculty of Sciences, Michoacán University (UMSNH), Morelia, Michoacan, Mexico
[2]Faculty of Engineering Postgrade Studies Division, National University of Mexico (UNAM), Mexico City, Mexico

New geothermal energy sources hold promise for the future. Deep submarine geothermal energy related to hydrothermal vents is emerging in many places along the oceanic spreading centers. Shallow submarine geothermal systems are found near to continental platforms. We present the initial development of mathematical models to simulate the energy transport in submarine systems. A model for the ...

Multiphysics Modeling of an Ion Mobility Spectrometer

T. Adams, and J. Fulton

Naval Surface Warfare Center, Crane Division, Crane, IN, USA

In Eiceman and Karpas’s book Ion Mobility Spectroscopy (2005), they define Ion Mobility Spectroscopy (IMS) as "the principles, methods, and instrumentation for characterizing chemical substances on the basis of velocity of gas-phase ions in an electric field." The production of the electric field and signal processing components is relatively inexpensive compared to other analytical ...

AC/DC Modeling and Experimental Impedance Verification of 3D MEMS Inductor Coils

T. Reissman, and E. Garcia
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA

In this work, an analysis is presented for a 3-dimensional RF MEMS coil using the COMSOL AC/DC module in conjunction with the CAD import module. The realization of being able to produce such 3-dimensional RF coils allows for less surface area to be needed for similar inductor performance in comparison to larger planar RF coils by maintaining the same number of turns through super-positioning of ...

Two-Dimensional Thermal Hydraulic Analysis and Benchmark in Support of HFIR LEU Conversion using COMSOL

J. D. Freels[1], I. T. Bodey[2], R. V. Arimilli[2], K. T. Lowe[3]
[1]: Oak Ridge National Laboratory
[2]: University of Tennessee, Knoxville, TN
[3]: Bettis Atomic Power Laboratory, West Mifflin, PA

The research documented herein was funded by a research contract between the Research Reactors Division (RRD) of Oak Ridge National Laboratory (ORNL) and the University of Tennessee, Knoxville (UTK) Mechanical, Aerospace and Biomedical Engineering Department (MABE). The research was governed by a statement of work (SOW) which clearly defines nine specific tasks. This report is outlined to ...

Deformation of Drop-within-Drop System under the Influence of High Intensity Oscillating Electric Field

D. Das[1], R.S. Patil[1], S. Kulkarni[1], V.A. Juvekar[1], and R. Bhattacharya[2]
[1]IIT Bombay, Mumbai, Maharashtra, India
[2]India Atomic Energy Regulatory Board, Mumbai, Maharashtra, India

This paper deals with the simulation study using COMSOL on the deformation of drop-within-drop system in a high intensity oscillating electric field. It consists of a composite drop suspended in a continuous phase. This composite drop has a smaller inner drop suspended within the larger outer drop. The outer drop is made up of another immiscible liquid. A high intensity sinusoidally varying ...

Modeling Neural Tissue and Membrane Behavior During Far-field Current Injection

R. Sadleir[1], A. Minhas[2], and E.J. Woo[2]
[1]University of Florida, Gainesville, FL, USA
[2]Kyung Hee University, Seoul, Republic of Korea

In an earlier work we developed a finite element bidomain model of an aplysia abdominal ganglion in order to estimate the sensitivity of this contrast mechanism to changes in cell membrane conductance occurring during a gill-withdrawal reflex. We used our model to determine both current density and magnetic potential distributions within a sample chamber containing an isolated ganglion when it ...

Finite Element Modeling of the Stress Field in a Cell-Seeded Microchannel

G. Zhu, and Y. Li
Lawrence Technological University, Southfield, MI, USA

Fluids used in biomedical microelectromechanical systems (BioMEMS) devices often exhibit very different flow behavior from those in bulk solutions, which in turn affects the behavior of cells and biomolecules in the device. In this work, we investigate an integrated microfluidic system for living cell culture and assay. The system can be used as a generic platform to study the behavior of ...

Model of Combustion Synthesis of Thermoelectric Calcium Cobaltates

J. Selig, and S. Lin
Lamar University, Beaumont, TX, USA

Self-propagating High-temperature Synthesis (SHS), a very economical synthesis of oxides was used in our lab to produce oxide materials. SHS process uses a highly exothermic reaction to convert reactants rapidly to pure products with minimal external energy input. This reaction is initiated by an igniter and reaction front propagates from the ignition through the rest of the sample. The fast ...

Finite Element Modeling of a Cell Lysing Chip

S. Maloney[1,2], Y. Li[1,2], G. Auner[1], and J. Smolinski[1]
[1]Wayne State University, Detroit, MI, USA
[2]Lawrence Technological University, Southfield, MI, USA

We are working on a microfabricated lysing chip that uses a piezoelectric actuator to provide ultrasonic energy to break apart cells. The device contains pillars with varying dimensions. We hypothesize that increasing the aspect ratio of pillars will increase the efficiency of the transfer of ultrasonic energy into the fluid phase and enhance the lysing efficiency. The fluid structure ...

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