Technical Papers and Presentations

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.

Design and Simulation of a Spout Fluid Bed Coating System

Joel L. Plawsky and Howard Littman
Department of Chemical and Biological Engineering
Rensselaer Polytechnic Institute
Troy, NY

Since aerogel materials are open cell, inorganic foams, the surface pores of the material must be sealed for large scale application. Here we discuss the design and development of a spout fluid bed system for producing coated aerogel particle material. COMSOL Multiphysics was used in the design of the system to track the details of the flow field and individual aerogel particle trajectories. ...

Better Understanding of Resonance through Modeling and Visualization

D.O. Ludwigsen, C. Jewett, and M. Jusczcyk
Kettering University

Students encounter cavity resonance and waveguide phenomena in acoustics courses and texts, where the study is usually limited to cases with simple geometries: parallelepipeds, cylinders, and spheres. At Kettering University, we are beginning to employ finite element modeling in our acoustics classes to help undergraduates better understand the acoustic modes of actual structures. This ...

Solidification of a Liquid Metal Droplet Impinging on a Cold Surface

Tanai L. Marin,
Faculty of Physics and Mathematics Sciences,
Department of Mining Engineering,
University of Chile,
Santiago, Chile

A method for the solidification of a free surface liquid phase is presented and solved with COMSOL Multiphysiscs using a fixed grid. In this case, the Level set method with phase re-injection for mass conservation is used to prescribe the movement of the free surface of the liquid droplet, whereas a modified version of the method presented by Voller and Prakash is used to account for the ...

Finite Element Approach to Microwave Sintering of Oxide Materials

Yuhua Duan1,2, Dan C. Sorescu1 and J. Karl Johnson1,3
1National Energy Technology Laboratory, 2Parsons Project Services Inc.,3Department of Chemical Engineering

Microwave sintering has been applied to a wide variety of, and recent experimental results have showed that for semi-metal or magnetic materials, the magnetic field (H) can have a significantly larger contribution than the electric field (E) during sintering. We have employed COMSOL Multiphysics to simulate the sintering process by adding the magnetic field contribution into the heating source. ...

Study of the Electric Field Intensity in Bushing Integrated ZnO Surge Arresters by Means of Finite Element Analysis

M.R. Meshkatoddini
Shahid Abbaspour (PWUT) University of Technology, Tehran, Iran

In this paper, the electric field in different types of ZnO surge arresters has been investigated by means of finite element modeling using COMSOL Multiphysics. Both conventional and novel built-in-bushing type arresters were studied. Electric field modeling helps designers consider important factors affecting the maximum field intensity in the arrester, avoiding damages to the arrester ...

Modeling Acoustic Wave Scattering from Cells and Microbubbles

O. Falou [1], J.C. Kumaradas[2], and M.C. Kolios[1,2]
[1] Dept. of Electrical and Computer Engineering, Ryerson University
[2] Dept. of Physics, Ryerson University

A finite-element model of wave propagation using COMSOL Multiphysics has been developed to solve the problem of ultrasound scattering from spherical structures. This model will be used to predict ultrasound backscatter from cells for ultrasound tissue characterization, and scattering from microbubble contrast agents. In this paper, we discuss an improvement to our model by using a ...

COMSOL Modelling of the Gas Mixing Process in a Ripple Reducer for NPL’s Time Division Dilution System

J. Wang, B.A. Goody, and M.J.T. Milton
National Physical Laboratory, Teddington, Middlesex, UK

The mixing process of a ripple reducer designed for a time division dilution system (TDD) that dynamically generates calibration gas mixtures is modelled in 2D using COMSOL Multiphysics. The model can been used to visualize and optimize the mixing process and extract parameters of interest at chosen times and positions. The simulated time response of an analyte concentration agrees with ...

Modeling Remote H2 Plasma in a Semiconductor Processing Tool

J. Brcka
TEL Technology Center, America, LLC

Hydrogen plasma is typically used in the semiconductor industry for materials processing, surface preparation and cleaning of silicon wafers and thin films. In this contribution, we developed a 2D/3D plasma fluid model as described by the set of the species and energy balance equations in a generic semiconductor tool chamber with remote Inductively Coupled Plasma (ICP) source. Background ...

Simulation of DNA Hybridization Kinetics in Open Electrokinetic Microchannels

J.R. Pascault, and H.S. Zhou
Worcester Polytechnic Institute, Department of Chemical Engineering, Microfluidics and Biosensors Laboratory

In this study, we show that the specific DNA hybridization is diffusion limited; whereas the non-specific hybridization is reaction limited. By means of an electrical field, DNA is put in motion. It results in an overallenhancement of the kinetics and a better ratio of specific hybrids over total hybrids.

Using Coupling Variables to Solve Compressible flow, Multiphase flow and Plasma Processing Problems

D. Smith
MKS Instruments

This presentation summarizes three different types of modeling using COMSOL Multiphysics. It is divided into three parts: Compressible flow, Multiphase flow, and Plasma Simulations. For the first part, we perform a special case study of the Mass Flow Verifier. A Mass Flow Verifier validates the accuracy of a Mass Flow Controller by measuring the rate of change of pressure in a fixed volume. ...

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