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.

Simulation and Experimental Validation of the Core Temperature Distribution of a Three-Phase Transformer

R. Barroso[1]
[1]Universidade Federal do Ceará, Fortaleza, Ceará, Brazil

This paper presents an application of COMSOL Multiphysics® software in the study of the temperature distribution of a 5kVA three-phase air-cooled transformer. A 3D, steady state model was utilized on the simulations. The interface with the surrounding air was modeled by Newton's Law of Cooling, discarding the need of solving the external air flow. The simulation agreed with the experimental ...

Numerical Simulation of the Heat, Mass, and Momentum Transfer During the Microwave Drying of Osmodehydrated Porous Material

J. R. Arballo[1, 2], L. A. Campañone[1, 2], R. H. Mascheroni[1, 2]
[1]Universidad Nacional de La Plata (UNLP), La Plata, Buenos Aires, Argentina
[2]Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), La Plata, Buenos Aires, Argentina

Recent studies have been devoted to develop mathematical models to simulate the food processing using the porous media approach. The aim of this study is to simulate the microwave drying of osmodehydrated food by means of modeling the mass, energy and momentum transfer using the porous media approach. Microwave drying involves complex physical mechanisms which should be taken into account in the ...

Simulation of a Multilayer Thermal Regulator for an Optical Reference

J.A. Ospina[1] and E. Canuto[1]
[1]Politecnico di Torino, Torino, Italy

The research project under which the COMSOL simulations are performed deals with multilayer and fine thermal control of an optical reference cavity for space applications. The cavity, made of Ultra Low Expansion glass (Corning ULE), must be kept close to the zero expansion temperature of the glass (close to room temperature). The target can only be met by active control, while leaving the cavity ...

A Two Dimensional Numerical Model for Multilayer Thin Films Irradiated by a Moving Laser

N. Bianco, O. Manca, and D. Ricci
Università degli Studi di Napoli

A numerical analysis of the conjugate optical-thermal fields in an amorphous silicon thin film deposited on a glass substrate and irradiated by a moving Gaussian laser source is carried out. The combined optical and thermal models are solved by means of COMSOL Multiphysics. Results are given for continuous and pulsed moving Gaussian heat sources and they are presented as temperature ...

A Study on the Effects of the Nusselt Number and the Dimensional Parameters on Carbon Nanostructure-Based Pin Fin Heatsinks Grown-on-Package for Electronic Package Cooling by Natural Convection

P. Rezai1,2, M. S. Kabir1,2, and P. Enoksson1
1Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, Sweden
2SMOLTEK AB, Gothenburg, Sweden

In this paper, an experimental and theoretical study of natural convectional heat transfer from directly grown-on-package carbon nanostructure-based pin fin heatsinks is studied. The simulations are done by using the Heat Transfer Module in COMSOL Multiphysics. To verify the model, we chose a reference commercial Al-based heatsink manufactured by Thermaflo Inc.In all simulations, a rectangular ...

Modeling of the Bread Baking Process Using Moving Boundary and Arbitrary-Lagrangian-Eulerian (ALE) Approaches

C. Anandharamakrishnan, N. Chhanwal, P. Karthik, D. Indrani, and K.S.M.S. Raghavarao
Central Food Technological Research Institute, Mysore, Karnataka, India

Bread baking is a complex process where various physiochemical and biological transformations take place simultaneously. A two dimensional model was developed for the bread baking process taking into account of volume expansion, heat and mass transfer processes. Phase change and evaporation-condensation mechanism were incorporated by defining thermo-physical properties of bread as a function of ...

Heat Flux Predictions for a 3-D Compost Model

M. Teutli [1], Jiménez[1], Lozano[1], Peláez[1], J. Roque[2], and I. González[3]
[1]BUAP, Puebla, Mexico
[2]Universidad Veracruzana, Xalapa, VZ, Mexico
[3]UAM, Mexico City, Mexico

A 3-D model for compost was constructed taking as geometry basis a truncated cone, with dimensions of 4 m radius and 3 m height; in this structure an energy balance is applied for a two phase system (solid-air). Compost energy processes are modeled using COMSOL with a modified heat transfer equation which includes: volumetric heat capacity, chemical oxidation and biological growing and ...

Complex Geometry Creation and Turbulent Conjugate Heat Transfer Modeling

I. Bodey[1], R. Arimilli[1], and J. Freels[2]
[1]Dept. of Mechanical, Aerospace and Biomedical Eng., The University of Tennessee, Knoxville, TN
[2]Research Reactors Division, Oak Ridge National Laboratory, Oak Ridge, TN

The High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL) is an 85 MW, light-water moderated, research reactor that operates at low temperature and high pressure. The HFIR is presently scheduled to convert from a high enriched uranium fuel (HEU) to a low enriched uranium fuel (LEU) in 2019. Due to cost constraints, not all experiments will be repeated for the LEU fuel ...

Porous Media Based Model for Deep-Fat Vacuum Frying Potato Chips

A. Warning, A. K. Datta, A. Dhall, and D. Mitrea
Department of Biological and Environmental Engineering
Cornell University
Ithaca, NY

A multiphase porous media model involving heat and mass transfer within a potato chip was implemented in COMSOL 3.5a. The diffusive flux in oil and liquid water was modeled from capillary driven flow while the gas phase was modeled using binary diffusion. A non-equilibrium water evaporation rate was used and Darcy's law for the momentum equation to solve for the convection of each ...

A Study of Thermo-Fluid Behavior in Tubular Metal Hydride Beds in the Hydriding Process

S. Makridis[1], E.I. Gkanas[1], A. Ioannidou[2], E.S. Kikkinides[2], A.K. Stubos[3]
[1]Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece & Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR “Demokritos”, Athens, Greece
[2]Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece
[3]Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR “Demokritos”, Athens, Greece

Hydrogen, the most abundant element in the universe, has great potential as an energy source, and can be generated from renewable energy sources. We used COMSOL for the solution of the energy, mass and momentum balance equations that describe the hydrogen absorption and desorption procedure in the metal hydride compressor. Thermodynamic or engineering properties like the reaction enthalpy ??, ...

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