Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

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 ...

Laser Welding of a Titanium Feed Through

H. Viatge
SORIN Group, France

In all implantable medical devices, one main challenge is to assure no water penetrates in the electronic part of the system. To be able to transmit the electronic information from the inside of the device to the lead without any water infiltration, we used a complex part called feed through. This piece is made of four different materials: titanium, alumina, gold and platinum. It is ...

Use of Simulation in the Development of Next-generation Measurement Standards for Radiation Dosimetry

R. E. Tosh[1], H. Chen-Mayer[1]
[1]NIST, Gaithersburg, MD, USA

Calibration of field instruments used in radiation treatment clinics is currently traceable to NIST primary standards via protocols involving static, flat-field radiation beams. By contrast, radiation beams prescribed for treating cancer incorporate temporal and spatial modulation strategies in order to maximize dose to the tumor while sparing healthy tissue. Differences in the detector ...

Study of the Process, Design, and Operating Parameters Effect on the Efficiency of the Process Mill - new

A. K. Farouk[1]
[1]Department of Mathematics & Natural Science, University of Stavanger, Sandnes, Rogaland, Norway

This study is to investigate the velocity pattern and the velocity magnitude of the cuttings that is being processed in the process mill as a result of the rotating hammers. The process mill consists of a horizontal cylindrical shell equipped with renewable liners and rotating hammers for milling of drill cuttings. An F.E model of the process mill was constructed using dimensions similar to ...

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 ...

Microwave Heating at the Grain Level

S. Lefeuvre[1], and O. Gomonova[2]
[1]Eurl Creawave, Toulouse, France
[2]Siberian State Aerospace University, Krasnoyarsk, Russia

The microwave heating and processing of heterogeneous material is usually simulated using a set of coupled PDE equations in an homogeneous medium. Nowadays it is possible to describe more accurately the process with a suitable description of the heterogeneities that is at the grain level. Many authors work with spheres (circles) to represent the grains but it is difficult to achieve an ...

Modelling and Experimental Validation Possibilities of Heat Transfer Room Model

M. Zalesak, and V. Gerlich
Tomas Bata University in Zlin, Zlin, Czech Republic

The study presents first authors experience with COMSOL Multiphysics environment used as a possible modeling tool of thermal building behavior. The idea of the project was to gain thermal response to changed boundary conditions with the application of COMSOL environment as a modeling tool for 3D buildings or 3D building segments. The room as building segment was implemented in the COMSOL ...

Building a Complex Geological Model Using Parametric Surfaces

S. Hoyer[1], M. Bottig[1], F. Zekiri[1], G. Götzl[1], A.K. Brüstle[1], G. Schubert[1], A. Nador[2]
[1]Geological survey of Austria, Vienna, Austria
[2]Geological Institute of Hungary, Budapest, Hungary

Temperature measurements of the subsurface are available due to hydrocarbon exploration in the project area, where the average drilling depth is about 2-4 km and the deepest well reaches about 8.5 km. Since the data is heavily uneven distributed, standard interpolation techniques did not deliver satisfying results. This is why numerical modeling was applied to assess the thermal regime of the ...

Smart Radiator Upgrade (Super Smart with Natural Gas)

E. Bozelie[1], P. Bruins[1]
[1]Saxion University Enschede, Enschede, The Netherlands

In heating upgrades, most attention is paid to the boiler. When upgrading to HR++-boilers (eff of 107%) however, difficulties may occur since the high efficiency boilers are designed for water temperatures around 40°C, while the old radiators are designed for water temperatures higher than 60°C. The resulting mismatch may lead to reduced performance, a larger carbon footprint and increased ...

Simulated Rheometry of a Nonlinear Viscoelastic Fluid

A. Czirják[1], Z. Kőkuti[1], G. Tóth-Molnár[1], P. Ailer[2], L. Palkovics[2], G. Szabó[1]
[1]University of Szeged, Szeged, Hungary
[2]Kecskemét College, Kecskemét, Hungary

In certain cases, the accuracy of measurements with a rotational rheometer can be influenced by inefficient thermal management, by the heat generated in the sample, or by rod-climbing due to the Weissenberg effect. We investigate the effect of these phenomena with simulations in COMSOL Multiphysics®. Our model is based on the axial symmetric (2D) formulation of the two-phase flow with the ...