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.

Electric Field Distribution in Biological Tissues for Various Electrode Configurations - A FEMLAB Study

Mitchell, W., Sundararajan, R.
Electronics & Computer Engineering Technology, Arizona State University, Mesa, AZ

Electroporation or Electropermeabilization (EP) is a non-viral physical process of inducing and/or increasing permeability of biological membranes by the application of high intensity and short duration electrical pulses. The resulting high field strength in the membrane can lead to the formation of regions of increased permeability, often called pores that allow transmembrane transport of ...

A computational fluid dynamics model of a 20Kg induction stirred laboratory scaled ladle

Pal, M., Eriksson, R., Jönsson, P.
MSE, KTH-Stockholm

In this paper a computational fluid dynamics model of a 20 Kg laboratory scaled induction ladle is presented. This particular laboratory furnace can be equipped with an electromagnetic stirrer, which can be used to agitate the steel melt. The CFD model so developed will make it feasible to have information about the fluid flow in this particular laboratory furnace. The objective of this paper ...

Freie Konvektion im Vertikalen Spalt – Analytische Lösungen und Numerische Simulation

Bühler, K.
Hochschule Offenburg, FB Maschinenbau und Verfahrenstechnik

Durch Temperaturunterschiede hervorgerufene freie Konvektionsströmungen treten in Natur und Technik in vielfältiger Form in Erscheinung. Damit verbunden sind wichtige Wärmetransportprozesse. Analytische Lösungen sind nur für einfache Sonderfälle bekannt, wie die einschlägige Literatur (Jischa 1982, Merker 1987, Müller&Ehrhard 1999) zeigt. Für die vertikalen Spaltströmungen mit ...

Electromagnetic material properties sensor

Gamache, R.W.
TransTech Systems, Inc

Recent research conducted by the author has shown that electromagnetic sensors can be utilized to determine selected properties of heterogeneous material mixtures containing water by observing the manifestations of surface polarization effects that occur in the radio frequency portion of the electromagnetic spectrum. Prior to the availability of multiphysics finite element (FEM) or finite ...

On Teaching Chemical Engineering Fundamentals Using FEMLAB

William M. Clark,
Worcester Polytechnic Institute

We are investigating the feasibility of using FEMLAB as an integral part of the educational experience of chemical engineering students at Worcester Polytechnic Institute. Our current practices and immediate plans for using FEMLAB in teaching include homework and projects in a graduate course, simulations of unit operations laboratory experiments for use as pre-lab preparations for actual lab ...

Optimization of thin film heater/sensor design for miniature devices using finite element analysis

Hoang, V.N., Kaigala, G.V., Backhouse, C.J.
ECERF, University of Alberta, Edmonton, Alberta, Canada

Localized heating is poised to become an integral part of microfluidic devices in various life-science applications. This is catalyzed by the scale of economics, the advantageous fluidic behavior at small volumes, and the ever increasing need for rapid and high throughput assays for pharmaceutical industry and other combinatorialbased studies. For precision confined heating, thin film resistive ...

Ultrasound Propagation in Viscoelastic Material Guides

Castaings, M.1, Predoi, M.V.2, Hosten, B.1 1 Laboratoire Mécanique Physique, Univ. Bordeaux 1, UMR CNRS 5469, Talence, France
2 Catedra de Mecanica, Universitatea Politehnica Bucuresti, Bucuresti, Romania

Wave propagation in elastic waveguides is a problem of constant interest from the last decades. Several numerical approaches exist. The most intuitive uses time-marching routines that solve the equations of dynamic equilibrium and supply displacements of the structure nodes as time functions. This procedure is usually time and memory consuming due to huge number of temporal iterations required ...

An Integrated Approach for Simulating Bone Adaptation of Shape and Material Properties using FEMLAB with MATLAB and Simulink

Liu, X., Hart, R.T.
Tulane University, Department of Biomedical Engineering

A new computational approach for simulating bone adaptation was implemented using FEMLAB with MATLAB and Simulink. A Simulink model was created to describe shape adaptation of bone as a negative feedback system, in which the adaptation driving signals tend to return to an equilibrium range in which no shape adaptation will occur. FEMLAB was invoked using a MATLAB S-function in the Simulink ...

Modeling an integrated, high flow rate MEMS ferrofluid pump

Mao, L., Koser, H.
Department of Electrical Engineering, Yale University, New Haven, CT

We present a FEMLAB modeling study of an integrated, high-flow rate microfluidic pump for ferrofluids. Initial studies of these microfluidic devices have been performed using a onedimensional setup in MATLAB and later confirmed by corresponding simulations with FEMLAB 3.1 in partial differential equation (PDE) mode. It is determined that maximum flow velocity is achieved when the product of ...

Numerical Simulation of Fluid Flow During Arc Welding

Carin, M.1, Favre, E.2
1 Laboratoire d’Etudes Thermiques Energétique et Environnement, Université de Bretagne Sud, Lorient, France
2 Comsol France, Grenoble, France

A 2D axisymmetric model of a melt pool created by an arc type heat source has been developed using FEMLAB. The model solves the coupled equations of laminar fluid flow and heat transfer to demonstrate the flow behaviour in the pool. The coupled effects of buoyancy and capillary forces are taken into account. The presence of the liquid – solid interface is modelled by two different ways: a ...

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