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Terme recherché:

2016 - All

Simulation of Thermomechanical Couplings of Viscoelastic Materials

F. Neff [1], T. Miquel [2], M. Johlitz [1],
[1] Universität der Bundeswehr München, Munich, Germany
[2] École polytechnique, Palaiseau, France

Using COMSOL Multiphysics® software, a new model was implemented with the Physics Builder functionality, which provides a thermomechanical coupling. It consists of two independent physics interfaces, one for the mechanical, viscoelastic behavior and one for the heat transfer. With the ... En savoir plus

Modeling and Simulation of Thermal Runaway in Cylindrical 18650 Lithium-Ion Batteries

A. M. Melcher [1], C. Ziebert [1], B. Lei [1], M. Rohde [2], H. J. Seifert [2]
[1] Karlsruhe Institute of Technology, IAM-AWP, Karlsruhe, Germany
[2] Karlsruhe Institute of Technology, Karlsruhe, Germany

In this work the coupled electrochemical-thermal model for a lithium-ion battery (LIB) based on porous electrode theory has been extended with contributions coming from exothermic side reactions based on an Arrhenius law to model abuse mechanisms, which could lead to a thermal runaway. ... En savoir plus

Numerical Model for Predicting Heat and Mass Transfer Phenomena during Cake Baking

P. Le Bideau [1], R. Cutté [1], P. Glouannec [1], J. F. Le Page [2]
[1] Univ. Bretagne Sud, FRE CNRS 3744, IRDL, F-56100 Lorient, France
[2] DPP, ADRIA Développement, Quimper, France

A transient two-dimensional axisymmetric model is implemented in COMSOL Multiphysics® software to simulate temperatures, moisture contents distributions and cake swelling during the baking of cake contained in mold. The medium is assumed to be a deformable porous medium containing three ... En savoir plus

Push or Pull, How Does Silk Flow?

J. Sparkes [1],
[1] University of Sheffield, Sheffield, UK

Silk is one of the longest used and most recognizable textiles that we, as a society, use regularly. We see it as a luxury good, worn as an indicator of success and value. However, despite mankind having domesticated and farmed silkworms for millennia, we still know relatively little ... En savoir plus

Numerical Analysis of the Phase Change in High Power Latent Heat Storages with 3D Wire Structures

A. Schlott [1], J. Hörstmann [2], O. Andersen [1], J. Meinert [1],
[1] Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Branch Lab Dresden, Dresden, Germany
[2] Denso Automotive Deutschland GmbH, Department Heat Exchanger Application, Eching, Germany

Latent heat storage devices use the melting enthalpy of a so-called phase change material (PCM) to store thermal energy. Open porous metals, such as 3D wire structures, allow the design of systems with tailored storage capacity and power. A geometric unit cell was identified, modelled ... En savoir plus

Spectroscopic Modeling of Photoelectrochemical Water Splitting

P. Cendula [1], J. O. Schumacher [1],
[1] Institute of Computational Physics, Zurich University of Applied Sciences, Winterthur, Switzerland

A photoelectrochemical (PEC) cell uses solar energy to split water to hydrogen and oxygen in single integrated device. Electrochemical impedance spectroscopy is a suitable tool to characterize recombination and reaction mechanisms in PEC cell. Full numerical drift-diffusion calculations ... En savoir plus

Acoustic Fluid-Structure Interaction Modeling of Gravity Dams in the Frequency Domain

A. De Falco [1], M. Mori [1], G. Sevieri [2],
[1] University of Pisa, Pisa, Italy
[2] University of Florence, Florence, Italy

The assessment of the seismic safety of gravity dams is a topic of great importance in civil engineering. In this paper, fluid structure interaction modeling of gravity dams during earthquakes is investigated. In particular, this work aims to provide physical significance of a plan ... En savoir plus

2D Axisymmetric Simulation of Pulsed Electrochemical Machining (PECM) of Internal Precision Geometries

M. Hackert-Oschätzchen [1], M. Kowalick [1], R. Paul [1], M. Zinecker [1], D. Kuhn [1], G. Meichsner [2], A. Schubert [3],
[1] Professorship Micromanufacturing Technology, Technische Universität Chemnitz, Chemnitz, Germany
[2] Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany
[3] Professorship Micromanufacturing Technology, Technische Universität Chemnitz, Chemnitz, Germany; Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany

This study presents investigations on a developed process design for manufacturing internal precision geometries by pulsed electrochemical machining (PECM) with help of multiphysics simulations. Therefore, a 2D axisymmetric transient model was created. The considered physical phenomena ... En savoir plus

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