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.

Thermo-Fluid Dynamics of Flue Gas in Heat Accumulation Stoves: Study Cases

D. Rossi[1], P. Scotton[1]
[1]University of Padova, Department of Geosciences, Padova, Italy

The research aims to clarify some aspects of the thermo-fluid dynamics of woody biomass flue gas, within the twisted conduit inside the heat accumulation stoves, and exposes also some analysis about the heat transport and heat exchange processes. The high temperature flue gas flows in the conduit, releasing heat to the refractory. The heat stored in the refractory is then released to the ...

Interpretation of Measurements with Novel Thermal Conductivity Sensors Suitable for Space Applications

N. I. Kömle[1], G. Kargl[1], E. Kaufmann[2], J. Knollenberg[2], and W. Macher[1]
[1]Space Research Institute, Austrian Academy of Sciences, Graz, Austria
[2]DLR Institut für Planetenforschung, Berlin, Germany

Thermal conductivity of near surface soil layers is a key parameter for understanding the energy balance of planetary bodies. To measure this property, heated needle sensors are frequently used in field and laboratory applications. To adapt this type of sensors for application on space missions, various modifications have to be implemented. An example for such a modified sensor is the ...

Modelling of Melt Cast Cooling and Solidification Processes for Explosives

P. Lamy-Bracq[1] and C. Coulouarn[1]
[1]Nexter Munitions, Tarbes, France

A solidification process of casting explosives in shell is studied in this paper. An enthalpy method approach is used to model the solidification process. Both the thermal and mechanical effects are taken into account. An ALE (Arbitrary Lagrangian-Eulerian) method is used to represent the physical deformation due to solidification. Results from the model are verified against experimental results. ...

Inverse Analysis for Heat Transfer Coefficient Identification

F. Tondini[1], P. Bosetti[1], and S. Bruschi[1]

[1]DIMS, University of Trento, Trento, Italy

The hot stamping of boron steels for producing complex structural components of the car body-in-white is more and more widespread. Optimization of sheet forming technologies at elevated temperatures is still troublesome, since the thermal, mechanical and metallurgical phenomena interacting during hot stamping force to feed the numerical model of the process by a huge amount of data, most of which ...

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 ...

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 ...

Advancements in Carbon Dioxide and Water Vapor Separations Using COMSOL Multiphysics®

J. Knox[1], R. Coker[1], R. Cummings[1], C. Gomez[1], G. Schunk[1]
[1]NASA, Marshall Space Flight Center, Huntsville, AL, USA

Some NASA efforts are focused on improving current systems that utilize fixed beds of sorbent pellets by evaluating structured sorbents, seeking more robust pelletized sorbents, and examining alternate bed configurations to improve system efficiency and reliability. For the bulk separation of CO2 and H2O, temperature changes due to the heat of adsorption are significant, requiring modeling and ...

Modeling Heat and Oxygen Atom Diffusion in Nuclear Fuel Rods with FEMLAB

Ramirez, J.C., Cristea, P., Stan, M.
Materials Science & Technology Division, Los Alamos National Laboratory

The nuclear reaction is modeled as a uniformly distributed volumetric heat source. All heat is conducted from the fuel towards the outer surface of the cladding. A number of results are presented.

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 ...

Modeling a Cooling Skylight

M. Fält, and R. Zevenhoven
Thermal and Flow Engineering Laboratory, Department of Chemical Engineering
Åbo Akademi University

Air-conditioning produced by traditional vapor compression cycle is an energy demanding operation. By using passive cooling methods is it possible to avoid, or at least reduce, the need for vapor compression cooling. A passive radiative cooling method could be a three windowed skylight, filled with a greenhouse gas. Earlier modeling of such a skylight has shown promising results, and work has ...

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