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.

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 ...

Application of COMSOL Multiphysics in the Study of Heat Transfer in Solids: Comparison with Measurements Obtained by Means of Infrared Photothermal Radiometry

V.M. Suárez Quezada[1], J.H. Wong[1], J.A. Calderón Arenas[1], E. Marín Moares[1], José Bruno Rojas Trigos[1], Antonio Gustavo Juarez Gracia[1], Jonathan F Guarachi solano[1]
[1]Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada Unidad Legaria del Instituto Politécnico Nacional, Mexico, Distrito Federal, Mexico

We report the use of Heat transfer Module of COMSOL Multiphysics and a technique based on Infrared Photothermal Radiometry to study the heat transfer of a homogeneous and isotropic solid material excited by a periodic laser beam on the front side of the sample, and one infrared detector on the rear side in order to obtain the evolution of difference of temperature with the time exposure. We use ...

Model-Based Calibration System for Direct Thermal Printing

W. Vetterling[1], and Z. Peng[1]
[1]Zink Imaging, Inc., Bedford, Massachusetts, USA

This document describes a method for maintaining the long-term calibration of a full color direct thermal printer. An essential component of the system is a thermal model created using COMSOL Multiphysics that allows fitting of color data recorded at different temperatures and exposure times to model results for the same conditions. The fitted results reveal the depth and thickness of color dye ...

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, ...

Heat and Mass Transfer in a Gypsum Board Subjected to Fire

B. Weber
Empa
Swiss Federal Laboratories for Materials Science and Technology
Duebendorf, Switzerland

Heat and mass transfer through a gypsum board exposed to fire is simulated and compared to experimental data. The gypsum board is modeled as a porous medium with moist air in the pores. A dehydration front develops at the fire side and travels through the board, consuming energy and releasing water vapor. The vapor migrates through the porous medium by convection and diffusion, and condenses in ...

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 ...

Modeling of Shrinkage Behavior in Cement Paste Using Thermal-structural Interaction

T. Chen[1], and P.G. Ifju[1]
[1]University of Florida, Gainesville, Florida, USA

This paper describes using thermal structural interaction to model the shrinkage behavior in cement paste under drying. An inverse method of combining the finite element analysis and the least-squares method is implemented to fit experimentally determined shrinkage in order to obtain material propertiesfrom the complex geometry used in the tests. The finite element model is created in COMSOL ...

Modeling of Shrinkage Behavior in Cement Paste Using Thermal-structural Interaction

T. Chen[1], and P.G. Ifju[1]

[1]University of Florida, Gainesville, Florida, USA

This paper describes using thermal-structural interaction to model the shrinkage behavior in cement paste under drying. An inverse method of combining the finite element analysis and the least-squares method is implemented to fit experimentally determined shrinkage in order to obtain material properties from the complex geometry used in the tests. The finite element model is created using COMSOL ...

Thermal Analysis of Vacuum Distillation Chamber in Pyroprocessing Facility

D. Sujish, S. Agarwal, B. Muralidharan, B.K. Sharma, V. Suresh Kumar, B. Prabhakara Reddy, G. Ravisankar, K. Nagarajan, C.A. Babu, and P. Kalyanasundaram
Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

Non aqueous metal fuel reprocessing involves electrochemical deposition of spent metallic fuel on the cathode of an electrolytic cell. Apart from metal fuel, the cathode deposit would also contain occluded molten salts and liquid cathode. Subsequent purification and consolidation of these heavy metals is conducted in a vacuum retort. Here the cathode deposits are charged into graphite crucible ...

Thermal Analysis of Joule Heated Ceramic Melter

P. Goyal, V. Verma, R.K. Singh, and K.K. Vaze
Bhabha Atomic Research Centre, Mumbai, Maharashtra, India

High level radioactive waste (HLW) generated by nuclear fuel cycle is immobilized using glass melters. In Glass melters such as Joule Heated Ceramic Melter (JHCM) electrodes immersed in the glass generates heat by the joule heating due to electric current passing between electrodes through glass. For melter performance it is required to evlaute temperature distribution in the melter. Thermal ...

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