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.

Understanding “Mutual Inductance” using COMSOL Multiphysics®

H.A. Ghali[1] and H.A. Rahman[1]
[1]Electrical Engineering Department British University in Egypt “BUE”, El Sherouk City, Egypt

A teaching platform that could be used to help students understand concepts such as; flux linking and mutual inductance has been developed using the AC/DC Module of COMSOL Multiphysics®. This is achieved through the accurate determination of different magnetic flux density components within the proposed geometry. Furthermore, based on the structure configuration, students can use obtained ...

Failure Modes of Underground MV Cables: Electrical and Thermal Modelling

P.A. Wallace[1], M. Alsharif[1], D.M. Hepburn[1], and C. Zhou[1]
[1]Department of Energy Systems Engineering, Glasgow Caledonian University, Glasgow, United Kingdom

Two simulations of the performance of a Paper Insulated Lead Covered (PILC) Medium Voltage (MV) underground cable are presented. The first presents the thermal response of a cable, over seven days, to a realistic load with a diurnal variation. The second concentrates on the variation of the electric field stress within the cable over a single AC cycle. The effects of a void defect within the ...

Dynamic Crack Propagation in Fiber Reinforced Composites

C. Caruso[1], P. Lonetti[1], and A. Manna[1]

[1]Department of Structural Engineering, University of Calabria, Arcavacata di Rende, CS, Italy

A generalized model to predict dynamic crack propagation in fiber composite structures is proposed. The proposed approach is based on a generalized formulation based on the Fracture Mechanics approach and Moving mesh methodology. Consistently to the Fracture Mechanics, the crack propagation depends from the energy release rate and its mode components, which are calculated by means of the ...

Local Conduction Heat Transfer in U-pipe Borehole Heat Exchangers

J. Acuna[1] and B. Palm[1]

[1]Department of Energy Technology, KTH, Stockholm, Sweden

The most common way to exchange heat with the bedrock in Ground Source Heat Pump (GSHP) applications is circulating a fluid through a U-formed closed loop in vertical boreholes drilled several tenths of meters into the ground. This study presents and compares the results of eight cross sectional U-pipe Borehole Heat Exchanger configurations. Values from recent experimental temperature ...

Finite Element Model of a Complex Glass Forming Process as a Tool for Control Optimization

F. Sawo[1] and T. Bernard[1]
[1]Fraunhofer Institute for Information and Data Processing IITB, Karlsruhe, Germany

This paper addresses the modeling of a complex glass forming process as an example of a complex, nonlinear distributed parameter system. The system is modeled by a fluid dynamics approach, which means that the forming is regarded as a fluid with free surfaces. Here, the coupling of the forming process with the heat flow is considered. The influence of crucial model parameters (e.g., dynamic ...

Coupling Miscible Flow and Geochemistry for Carbon Dioxide Flooding into North Sea Chalk Reservoir

B. Niu[1], W. Yan[1], A.A. Shapiro[1], and E.H. Stenby[1]

[1]Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

As an effective method to cope with green-house gas emission, and to enhance oil recovery, injection of carbon dioxide into oil reservoirs has obtained increasing attentions. The flooding process involves complex phase behavior among oil, brine and CO2, and geochemical reaction between CO2 and rock. COMSOL Multiphysics® was first applied to simulating two flooding processes with known ...

Multiphase, Dual Polymer Injection Molding and Cooling of an Open Cavity to Form both Distinct and Graduated Material Properties within a Complex Three-Dimensional Body

M.S. Yeoman[1]
[1]Continuum Blue Ltd, Forest Row, United Kingdom

With the advancement of medical devices and implants, many now require more advanced nonlinear, hyper-elastic materials such as elastomers to be extensively utilized in the body. This combined with the need to allow for considerably different, varying and graduated material responses within the three-dimensional device, poses a difficult challenge to manufacturing an elastomeric implant in a ...

Modelling Thermal Time-of-Flight Sensor for Flow Velocity Measurement

O. Ecin[1], E. Engelien[2], M. Malek[2], R. Viga[2], B. Hosticka[1], and A. Grabmaier[2]

[1]Institut of Mikroelektronische Systeme, University Duisburg-Essen, Duisburg, Germany
[2]Institut of Elektronische Bauelemente und Schaltungen, University Duisburg-Essen, Duisburg, Germany

This communication reports on a numeric fluid dynamics simulation on a pipe flow model. The basic background is to determine the velocity of a flowing fluid in a pipe by using the Thermal Time-Of-Flight (TTOF) method on water. The visualization of the temperature and velocity distribution in the pipe model is being carried out in order to enable proper design and optimization of the TTOF sensor. ...

Modeling of Viscous Fingering

E. Holzbecher[1]

[1]Georg-August University, Göttingen, Germany

Viscous fingering is a topic of interest since the beginning of computational fluid dynamics. Here we focus on the classical constellation of miscible displacement, as it has been investigated in Hele-Shaw cells. A temperature or salinity front is entering with a fluid that has a different viscosity. The pure 1D flow is destabilized by the Saffman-Taylor instability. Using COMSOL Multiphysics® ...

Simulating Superconductors in AC Environment: Two Complemetary COMSOL Models

R. Brambilla[1] and F. Grilli[2]
[1]ENEA - Ricerca sul Sistema Elettrico S.p.A., Milano, Italy
[2]Karlsruhe Institute of Technology, Karlsruhe, Germany

In this paper we present a summary of our work on numerical modeling of superconductors with COMSOL Multiphysics®. We discuss the two models we utilized for this purpose: a 2-D model based on solving Maxwell equations and a 1-D model for thin conductors based on solving the integral equation for the current density distribution. The latter is useful for modeling second generation ...

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