Artigos Técnicos e Apresentações

Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Food Cooking Process. Numerical Simulation of the Transport Phenomena

B. Bisceglia[1], A. Brasiello[1], R. Pappacena[1], R. Vietri[1]
[1]University of Salerno, Department of Industrial Engineering, Fisciano (SA), Italy

Aim of the study is to determine the influence of some of the most important operating variables, especially humidity and temperature, of drying air on the performance of cooking process of pork meat. The process is simulated using finite elements software COMSOL Multiphysics®. The proposed model considers two geometries: cylindrical and parallelepiped, with fixed physical properties and ...

A Practical Method to Model Complex Three-Dimensional Geometries with Non-Uniform Material Properties Using Image-based Design and COMSOL Multiphysics®

J. Cepeda[1], S. Birla[2], J. Subbiah[2], H. Thippareddi[1]
[1]Department of Food Science & Technology, University of Nebraska, Lincoln, NE, USA
[2]Department of Biological Systems Engineering, University of Nebraska, Lincoln, NE, USA

Geometries with heterogeneous material properties are typically defined as a set of multiple parts, each part representing a different material. However, assembling or defining the individual parts of complex geometries can be difficult. A practical method based on image-based mesh generation, a custom algorithm for labeling materials, and interpolation functions of COMSOL Multiphysics® can be ...

Numerical Computation of Two-Phase Flow in Porous Media

D. Droste[1], F. Lindner[1], C. Mundt[1], M. Pfitzner[1]
[1]Universität der Bundeswehr, Munich, Bavaria, Germany

In this study we investigate the heat and mass transfer in a porous media with phase change. The liquid fluid is injected from one side and heated from the other side, where it leaves the porous material in a gaseous state. Dominant forces are capillary interactions and two-phase heat conduction. To model the process we use a two-phase mixture model on a macroscopic scale. This model is ...

Modeling of a Magnetocaloric System for Electric Vehicles

A. Noume[1], C. Vasile[1], M. Risser[1]
[1]National Institute of Applied Science (INSA), Strasbourg, France

In automotive industry, regardless the type of engine we use, heating and air-conditioning is responsible for the highest energy consumption among all the auxiliary systems all over the year. For conventional vehicles with thermal engines, the heating of the internal space is easy obtainable because of the heat waste from the engine. For the electric vehicles, as the energy is delivered by the ...

Power Transistor Heat Sink Design Trade-offs

T. Eppes, I. Milanovic, and G. Quarshie
University of Hartford
West Hartford, CT

Power transistors require heat sinks to dissipate thermal energy and keep junction temperatures below the recommended limit. The reliability and longevity of any semiconductor device is inversely proportional to the junction temperature. Hence, a significant increase in reliability and component life can be achieved by a small reduction in operating temperature. A range of heat sink designs ...

Modeling a Combined Photovoltaic-Thermal Panel

E. Gutierrez-Miravete[1], B. Fontenault[2]
[1]Rensselaer Polytechnic Institute, Hartford, CT, USA
[2]General Dynamics-Electric Boat, Groton, CT, USA

A novel combined photovoltaic-thermal panel can simultaneously increase the conversion efficiency of the PV cell and utilize some of the excess thermal energy created by the conversion process (see Figure 1). The Conjugate Heat Transfer physics in COMSOL was used to create a two-dimensional, steady state model of such a combined photovoltaic cell-thermal panel. Figure 2 shows a magnified view of ...

Transient Heat Conduction in Semi-Infinite Solids Irradiated by a Moving Heat Source

N. Bianco1, O. Manca2, S. Nardini2, and S. Tamburrino2
1Dipartimento di Energetica, Termofluidodinamica applicata e Condizionamenti ambientali, Università degli Studi Federico II, Napoli, Italia
2Dipartimento di Ingegneria Aerospaziale e Meccanica, Seconda Università degli Studi di Napoli, Napoli, Italia

An analysis of the transient temperature distribution in a semi-infinite solid, irradiated by a moving Gaussian laser beam, is carried out numerically using COMSOL Multiphysics.Variable thermo-physical properties are accounted for. The workpiece is considered semi-infinite along the motion direction. Temperature distributions are evaluated both for different Peclet numbers and surface heat ...

3D Simulation of Heat and Moisture Diffusion in Constructions

M. Bianchi Janetti, and F. Ochs
University of Innsbruck
Unit Building Physics
Innsbruck, Austria

The simulation of heat and moisture transfer represents an essential resource in designing energy efficient buildings. In this paper a time-dependent wall model, consisting of several homogeneous domains, with third-type boundary conditions imposed on the surfaces, is implemented in the COMSOL Multiphysics environment. Temperature and moisture content is calculated inside the construction for ...

Multiscale Modeling of Polymer Crystallization

R. Spina[1], M. Spekowius[2], C. Hopmann[2]
[1]Dept. of Mechanics, Mathematics and Management (DMMM), Politecnico di Bari, Bari, Italy.
[2]Institute of Plastics Processing (IKV), RWTH Aachen, Aachen, Germany.

The manufacturing of high quality injection molded parts requires a deep understanding of material properties, process parameters and product design. The behavior of a polymer during the injection molding process and the performance of the final part are strongly determined by the material structure formed during filling and cooling. The main objective of the presented work is to describe the ...

Dimensionless versus Dimensional Analysis in CFD and Heat Transfer

H. Dillon[1], A.F. Emery[1], A. Mescher[1], and R.J. Cochran[2]
[1]University of Washington, Seattle, WA, USA
[2]Applied CHT, Seattle, WA, USA

Students in engineering and science are often exposed early in their studies to non dimensional analysis. When it comes to solving fluid flow/heat transfer problems, many solutions, particularly industrial ones, are based on finite element/finite volume using dimensioned quantities. In order to compare to reference information one would like to use codes like COMSOL Multiphysics to solve non ...

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