Presentazioni e Articoli Tecnici

In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.

A Multiphysics Approach to Fundamental Conjugate Drying by Forced Convection

M. de Bonis, and G. Ruocco
DITEC, Universitµa degli studi della Basilicata, Campus Macchia Romana, Potenza, Italy

Heat and mass transfer involved in drying is studied by using COMSOL 3.4. The effect of air temperature on the performance of the drying process applied to fresh food slices is scrutinized. COMSOL’s flexible formulation is exploited by using special drying kinetics for the substrate, and by including a treatment of the dependence of the properties upon the residual moisture content. The model ...

Harvesting Thermal Energy for Microid Microrobots

A. Shankar, F. Li, and J.V. Clark
Purdue University, West Lafayette, IN, USA

In this paper we present a computational study on harvesting thermal energy to electrically recharge microid microrobots. Microids are microrobots that have insect like dexterity. We examine the feasibility of extracting energy from the ambient environment through the piezoelectric legs of the microid. The microid’s use in remote locations makes it imperative for it to be able to recharge ...

Reliability Screening Test for Metal Foil Resistors

A. Cyganowski[1], H. Leidecker[2], J. Brusse[2], L. Panashchenko[2], and T.E. Schmidt[3]
[1]Rensselaer Polytechnic Institute, Troy, NY, USA
[2]NASA Goddard Space Flight Center, Greenbelt, MD, USA
[3]St. Mary's College of Maryland, St. Mary's City, MD, USA

Metal foil resistors are often chosen for NASA space flight applications due to their high precision and stability. COMSOL Multiphysics is used to develop a test that screens out metal foil resistors containing gridline defects. The resistors will be subjected to repeated short duration electrical pulses that induce localized heating and fatigue only in areas with constrained gridlines. The pulse ...

Laser Ablation Modeling of CIGS Solar Cells

S. Grubinskas, and G. Raciukaitis
Center for Physical Sciences and Technology
Vilnius, Lithuania

Structure under consideration was a layered medium consisting of various materials depending on the specific solar cell. Three processes are considered: energy coupling by electrons taking into account interference effects between the layers, energy transfer from electrons to the lattice using a two-temperature model for heat dissipation and phase transitions in materials. Incident ...

Sequential Estimation of Temperature-Dependent Thermal Diffusivity in Cherry Pomace during Nonisothermal Heating

I. Greiby[1], D. Mishra[2], and K. Dolan[3]
[1]Dept. of Biosystems & Agricultural Eng., MSU, East Lansing, MI
[2]Dept. of Biosystems & Agricultural Eng., MSU, East Lansing, and Nestle Nutrition, PTC Fremont, MI
[3]Dept. of Biosystems & Agricultural Eng. and Dept. of Food Science & Human Nutrition, MSU, East Lansing

Fruit and vegetables are a rich source of many bio-active compounds from which value-added nutraceuticals can be produced. To design processes for these solids that will maintain food safety and maximize quality over a large temperature range, temperature-dependent thermal properties are needed. The objective of this work was to estimate temperature and moisture-dependent thermal diffusivity of ...

Constructing Laser-Induced In Vitro Cell Damage Model Based on Thermal Analysis using COMSOL

S. Boukhris[1], M. Denton[2], and Y. Feng[1]
[1]Computational Bioengineering and Control Lab, University of Texas at San Antonio, San Antonio, TX
[2]TASC, Inc. Biomedical Sciences and Technology Dept., Ft. Sam Houston, TX

The use of lasers in the military and everyday life is growing each year. The purpose of the current research is to take full advantage of this new spatially-resolved thermal data to construct a mathematical and numerical model for laser-induced damage using COMSOL Multiphysics. The microthermography data were extracted for vertical and horizontal lines through the laser-exposed area of cell ...

Thermal Model of a Radiosonde System

E. Javier[1], J. Alberto Bava[1], and G. Rodriguez[2]
[1]Facultad de Ingenieria Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina.
[2]Facultad de Astronomia y Ciencias Geofisicas Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina.

This paper describes the development of a thermal model applied to a radiosonde system that calculates the average temperature on the printed circuit board PCB of the system. Using the thermal physics module called \"Conjugated Heat Transfer” of the COMSOL utility, simulations are performed which allow modeling the atmospheric conditions of the environment that the radiosonde will be ...

Modeling of Freeze-Drying of Coffee Solution using Arbitrary-Lagrangian-Eulerian (ALE) Method

C. Anandharamakrishnan, R. Deepak, N. Chhanwal, and K.S.M.S. Raghavarao
CFTRI, Mysore, Karnataka, India

Freeze-Drying is used widely in the food and pharmaceutical industries for its ability to dry thermolabile product and retain high quality. Freeze-drying involves three stage processes such as (i) freezing, (ii) primary drying and secondary drying. Modeling of primary drying is a very complex process because of the presence of a moving sublimation front whose position is determined by the heat ...

Heat Transfer in Beer Bottles As Explained By COMSOL Models

W.M. Clark, R.C. Shevlin, and T.S. Soffen
Worcester Polytechnic Institute, Worcester, MA, USA

In this poster we present experiments and calculations that investigate these claims and demonstrate how COMSOL Multiphysics can be used in an undergraduate student project to illustrate engineering fundamentals. We measured the temperature of water in glass, aluminum, and plastic bottles as a function of time upon cooling in a refrigerator, cooling in ice water, heating in air, and heating ...

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