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.

Modeling of Highly Stable Thermal Environment Using COMSOL

A. Alfauwaz, and K. Sun
Stanford University, Stanford, CA, USA

Precise physics experiments in space require highly stable thermal environments, especially if the experiments are targeted in earth orbits where eclipses will cast large temperature variation. We have been designing and modeling a thermal system with sub micro-kelvin stability using COMSOL. Our design is comprised of multiple alternative layers of conductive materials and vacuum isolations, ...

Coupling Forced Convection in Air Gaps with Heat and Moisture Transfer inside Constructions

M. Bianchi Janetti[1], F. Ochs[1]
[1]University of Innsbruck, Innsbruck, Austria

Introduction: The simulation of coupled heat and moisture transfer in constructions is becoming even more important in the last years. COMSOL Multiphysics represents a powerful tool for this kind of simulations as shown in [1,2,3], although applications in this area are still rare. For the realistic prediction of the heat and moisture distribution in building elements exposed to external climatic ...

Simulation of Heat-induced Fusing of Polymer Toner

Hoffmann, R.
Océ Printing Systems GmbH, Poing

The electrophotographic print process uses polymer toner particles to create the desired print image on the paper. After depositing the particles on the paper, the particle layer has to be heated beyond the glass point of the polymer to create a homogeneous layer. This fusing process is one of the most energy-consuming parts of the whole print process. It is therefore imperative to limit the ...

Effects of the Film Thickness on the Transient Conjugate Opticalthermal Fields in Thin Films Irradiated by Moving Sources in Back and Front Treatments

N. Bianco[1], O. Manca[2], S.Nardini[2], and D. Ricci[2]

[1]DETEC, Università degli Studi di Napoli Federico II, Napoli, Italy
[2]DIAM, Seconda Università degli Studi di Napoli, Aversa, CE, Italy

A two dimensional transient analysis of the conjugate optical-thermal fields induced in a multilayer thin film structure by a moving Gaussian laser source is carried out numerically in order to compare back and front laser treatment processes. Thermal and optical nonlinearity is induced during transient heating, since the response of weakly absorbing thin films depends on temperature. The heat ...

Use of COMSOL to Estimate the Thermal Properties and Kinetic Parameters for the Degradation of Anthocyanins in Grape Pomace

D.K. Mishra[1], and K.D. Dolan[1,2]
[1] Department of Biosystems and Agricultural Engineering, Michigan State University
[2] Department of Food Science and Human Nutrition, Michigan State University

Degradation of components in low-moisture and high-temperature food is difficult to model because of the temperature gradient and long heating time. A method was developed to estimate the thermal properties of grape pomace and the rate constant and activation energy of anthocyanin degredation.

Transient Analysis of the Buoyance Driven Flow in a Passive Solar System of Indoor Heating

G. Petrone, G. Cammarata, and L. Cammarata
Department of Industrial and Mechanical Engineering, University of Catania, Italy

This study aims to numerically investigate on a passive solar system for indoor heating called as \"Trombe wall\". The transient buoyancy driven flow characterizing that system and the thermal distribution are solved by numerically integrating the governing equations in COMSOL Multiphysics environment. Simulations are carried-out for a time range corresponding to 12 days. The results are ...

Optimization of Thermal Properties Identification of Complex Thin Films Using MATLAB® and COMSOL Multiphysics

N. Semmar[1], B. Wane[1]
[1]GREMI, UMR7344, CNRS-University of Orleans, Orléans Cedex 2, France

The importance of laser processing and thermal properties investigation of bulk materials and thin layers is still increasing. For thermal properties investigation many experimental systems were developed based on the photothermal effect. One of typical ways is to induce a rapid surface temperature increase is to use a pulsed laser beam, create a simplified model of this interaction, and compare ...

Inductive Heating Modelling with a Temperature-controlled Material

Hemous, R.
RocTool, France

Roctool is a company which develops and sells some process to heat and transform composite materials very quickly. One of these, the Cage System®, uses an inductive heating process which heats instantaneously the tooling surface of the mold, where the composite we want to transform is put. The thermal diffusion in the mass mold is reduced relative to other means of heating.

Negative Thermal Expansion Materials: Thermal Stress and Implications for Composite Materials

M.J. Jakubinek[1,2], C.A. Whitman[2,3], and M.A. White[1,2,3]
[1]Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, Canada
[2]Institute for Research in Materials, Dalhousie University, Halifax, Nova Scotia, Canada
[3]Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada

There is considerable interest in the possibility of combining NTE materials with normal (positive) thermal expansion materials, to reduce the potential of failure of a material or component due to thermal stress fracture. Finite element analysis (FEM) is used to explore the overall expansion and thermal stress in composites.

Transient Conjugate Optical-thermal Fields in Thin Films Irradiated by Moving Sources: A Comparison between Back and Front Treatment

N. Bianco[1], O. Manca[2], and D. Ricci[2]
[1]Dipartimento di Energetica, Termofluidodinamica applicata e Condizionamenti ambientali, Università degli Studi di Napoli Federico II, Napoli, Italy
[2]Dipartimento di Ingegneria Aerospaziale e Meccanica, Seconda Università degli Studi di Napoli, Aversa (CE), Italy

A two dimensional instationary analysis of the conjugate optical-thermal fields induced in a multilayer thin film structure on a glass substrate by a moving Gaussian laser source is carried out numerically in order to compare back and front laser treatment processes. COMSOL Multiphysics 3.4 code has been adopted to solve the combined thermal and electromagnetic problem in order to compare the two ...

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