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.

Air Flow Effect on the Temperature of a Building Integrated PV-Panel

G. Florides[1], S.A. Kalogirou[1], L. Aresti[1], R. Agathocleous[1], P. Christodoulides[1]
[1]Faculty of Engineering and Technology, Cyprus University of Technology, Limassol, Cyprus

This study examines the effect of air flow between the building integrated PV-panel and the wall. To formulate the heat exchange process for the air flowing between the PV panel and the wall, time-dependent, heat transfer partial differential equations (PDEs) are solved with COMSOL Multiphysics®. It is shown that in summer, the maximum temperature of a PV panel is observed on an east facing ...

Mechanistic Modeling of Non-Spherical Bacterial Attachment on Plant Surface Structures

A. Warning [1], A. K. Datta [1],
[1] Cornell University, Ithaca, NY, USA

The particle tracking model provided a deeper understanding to the experimental results. The model showed good agreement with experimental data for rotation, transport and attachment. In the attachment model, protrusions create low velocity, low shear regions increasing attachment while holes pull cells toward the surface and increase residence time on the surface increasing attachment rate.

Fluid Flow Modeling in a Bioreactor Applied to Wine Production

C. Soares [1], N. Padoin [1], P. M. Aballay [2], O. A. Ortiz [2],
[1] Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
[2] Universidad Nacional de San Juan, San Juan, Argentina

Wine quality is strongly dependent on the operation parameters of the production process. In batch or fed batch reactors, the rotating velocity should be carefully controlled to avoid cellular stress and ensure adequate mixing of the mixture. Moreover, precise control of substrates concentration evolution and cellular growth, as well as efficient heat transfer, allows the production of high ...

Pneumo-Hydrodynamic Droplet Generation

V. Mamet [1], P. Namy [2], N. Berri [1], L. Tatoulian [1], P. Ehouarn [1], V. Briday [1], P. Clemenceau [2], B. Dupont [1]
[1] DBV Technologies, Bagneux, France
[2] SIMTEC, Grenoble, France

Introduction Droplet-based microfluidics is a large source of research for scientists of new biotechnologies, aerosols or other 2D-Microfluidics devices. Here, we will focus on an industrial application of a 3D microfluidic device : the PH2DG, Pneumo-HydroDynamic Droplet Generator. The aim of the process is to produce mono-disperse, regular pattern of droplets, with a minimum size. To use it in ...

Thermal Model and Control of Metal-Organic Chemical Vapor Deposition Process

J. L. Ebert [1], S. Ghosal [1], N. Acharya [1]
[1] SC Solutions, Inc., Sunnyvale, CA, USA

Metal-Organic Chemical Vapor Deposition (MOCVD) is used for the manufacture of Multi-Quantum Well Light Emitting Diodes (MQW LEDs). The process uses a carrier gas flow containing a dilute mixture of metal organic precursors, Tri-Methyl Gallium (TMG) and Tri-Methyl Indium (TMI), to epitaxially deposit GaN and InGaN on a heated wafer of diameter ranging from 2" to 8". The gas mixture flows into a ...

Copper Electrochemical Polishing Optimisation

A. Pérez Rodríguez [1], L. Marques Antunes Ferreira [1],
[1] CERN, Geneva, Switzerland

A new electrochemical polishing facility will be built at CERN to process copper radiofrequency structures and this in the framework of the Future Circular Collider study. This polishing installation will be designed and assembled so that the necessary working conditions to achieve the ultimate limits of this technique are ensured. The main working variables like potential, current density, bath ...

On The Purification Of Waste Waters Using Multi-Bore Filters: Simulation Of A Long-Term Filtration Stage

I. Borsi
Dipartimento di Matematica U. Dini, Universita' di Firenze, Italy

We present the progress of the simulation activity we are carrying out within the PURIFAST LIFE+ project. We first present the model we formulated to describe the macroscopic effects of the filtration process taking place in a multi-bore filter, focusing on the fouling phenomenon. In membrane-based filters the fouling phenomenon is the major reason of a decreasing filtration efficiency. ...

Modeling of Transport Phenomena in Metal Foaming

B. Chinè[1], M. Monno[2]
[1]Laboratorio MUSP Piacenza, Italy; ITCR, Esc. Ciencia e Ing. Materiales, Cartago, Costa Rica
[2]Laboratorio MUSP, Piacenza, Italy; Politecnico di Milano, Dip. Meccanica, Milano, Italy

Metal foams are interesting materials with many potential applications in engineering. Foamed metals or alloys include gas voids in the material structure with the real possibility to modify ad hoc their physical properties. Following our previous efforts aimed to simulate and study the foaming process of a metal, we propose in this work a model which considers heat and mass transfer ...

Full System Modeling and Validation of the Carbon Dioxide Removal Assembly - new

R. F. Coker[1], J. Knox[1]
[1]NASA Marshall Space Flight Center, Huntsville, AL, USA

The Atmosphere Revitalization Recovery and Environmental Monitoring (ARREM) project was initiated in September of 2011 as part of the Advanced Exploration Systems (AES) program. Under the ARREM project, testing of sub-scale and full-scale systems has been combined with multiphysics computer simulations for evaluation and optimization of subsystem approaches. In particular, this paper describes ...

Modeling Fluid-Structure Interaction in a Pressure-Controlled Current-Limiting Valve

N. Mügge [1], A. Waschke [1], L. Fromme [1], M. Petry [1],
[1] Bielefeld University of Applied Sciences, Department of Engineering Sciences and Mathematics, Bielefeld, Germany

This assignment deals with the modeling of a pressure controlled current-limiting valve. For this purpose the CAE-Software COMSOL Multiphysics® is used. Current-limiting valves are used as a measure of safety in many hydraulic applications. They are deployed in cases of a high decrease in pressure due to a burst pipe or leaks. The chief aim of this project is to find a beneficial modeling ...