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.

Coupled Palaehydrogeological Microbial and Geochemical Reactive Transport Model of the Olkiluoto Site (Finland)

P. Trinchero[1], M. Luna[1], J. Molinero[1], G. Román-Ross[1], F. Maia[1], A. Nardi[1], J. Löfman[2], P. Pitkänen[3], L. Koskinen[3]
[1]Amphos 21 Consulting, Barcelona, Spain
[2]VTT Energy, Finland
[3]Posiva Oy, Olkiluoto, Finland

Olkiluoto at Eurajoki has been selected as the final repository site for spent nuclear waste in Finland. This area has been affected, at regional scale, by land-uplift processes related to the ice withdrawal. These events have resulted in a complex and stratified heterogeneous hydrochemical system. The objective of this work was to develop a robust paleohydrogeological reactive transport (PRT) ...

Near-Wall Dynamics of Microbubbles in an Acoustical Trap - new

L. Wright[1], G. Memoli[1], P. Jones[2], E. Stride[3]
[1]National Physical Laboratory, Teddington, UK
[2]University College London, London, UK
[3]University of Oxford, Oxford, UK

Understanding the interactions between microbubbles and surfaces is key to the successful deployment of microbubbles in a range of applications. Two important examples are their use as a drug delivery mechanism, and their potential use of acoustically-driven bubbles as microscale sensors. Drug delivery with bubbles involves sonication at high frequency close to a boundary, and sensing with ...

Multiphysics Model for Breakup of Charged Liquid Droplets in Electric Fields

S. Chaudhuri [1], W. Du [1],
[1] University of Illinois at Urbana-Champaign, Champaign, IL, USA

Predicting and controlling the formation of droplets from a liquid jet is a critical problem in a variety of applications ranging from fuel injection to paint sprays. It is known that liquid droplets subjected to an electric field acquire a net electrostatic charge via induction, and that the magnitude of this charge depends on the conductivity of the liquid and the size of the droplet [1]. When ...

Metal Foam Tube Flow Characterisation

T. Spillmann[1]
[1]CSIRO, Energy Technology, Newcastle, New South Wales, Australia

In this study the flow through a tube filled with highly porous aluminium foam of three different pore sizes is analysed using COMSOL Multiphysics® CFD Module and compared to experimentally determined pressure drop data. Analyzing the flow through an array of pores allow the deduction of characteristic flow parameters (permeability and form drag coefficient) that are utilized in a 2D ...

Hydrodynamics of Viscoelastic Jets in Extensional Flow

S. Kulkarni [1], V. Juvekar [1],
[1] Indian Institute of Technology Bombay, Mumbai, India

The extensional flow of viscoelastic flow is encountered during fibre spinning processes. A variety of polymers such as polyesters, polyacrylonitrile, rayon, acrylic, spandex etc are manufactured using this process. In the spinning process, polymer melt/ solution is extruded in the form of jet, through a porous plate called spinneret, into a bath having a suitable environment which allows ...

Deep Desulfurization of Diesel Using a Single-Phase Micro-Reactor

G. Jovonavic[1], J. Jones[1], and A. Yokochi[1]
[1]School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon, USA

This paper describes the benefits of computational fluid dynamics in the development of a microreactor used in the desulfurization of aromatic compounds. It is crucial to verify diffusion and extinction coefficients to ensure accurate simulation results prior to experiments. COMSOL Multiphysics was used to model the behavior of all of the possible species present and reactions that may occur.

Numerical Investigation of the Convective Heat Transfer Enhancement in Coiled Tubes

L. Cattani[1]
[1]Dipartimento di Ingegneria Industriale, Università degli Studi di Parma, Parma, Italy

The work is focused on the numerical analysis of forced convection in curved tubes investigating the correlation between the heat transfer and friction factor enhancement and the effects of the wall curvature. The analysis was performed by integrating the continuity, momentum and energy equations within COMSOL Multiphysics. The local Nusselt number reaches values higher than the ones expected ...

Biofluid-Structural Interaction in Abdominal Aortic Aneurysm for Predicting Timeline to Rupture: The Effect of Hypertension and Aorta Wall Material Properties - new

K. Cluff[1], H. Mehraein[1], G. Jayakumar[2]
[1]Bioengineering, Wichita State University, Wichita, KS, USA
[2]Industrial & Manufacturing Engineering, Wichita State University, Wichita, KS, USA

An abdominal aortic aneurysm (AAA) is a bulge formed in the large blood vessels that supply blood to the abdomen, pelvis, and legs. A fluid structure interaction model was developed in a 3D aortic aneurysm model, which was constructed from abdominal CT scan images. Combining medical imaging and computational fluid dynamics (CFD) in a time dependent study allowed the determination of wall ...

Pore-Level Influence of Contact Angle on Fluid Displacements in Porous Media - new

H. Ali Akhlaghi Amiri[1]
[1]University of Stavanger, Stavanger, Norway

Wettability affects two-phase displacements in porous media by determining the microscopic distribution of fluids in pore spaces. The impact of wettability on transport properties at macro-scales has been widely addressed in literature; however a deeper understanding of wettability effects demands pore-level investigations which are still limited. In this paper, COMSOL Multiphysics® software ...

Scattering of mm-Waves by Turbulent Structures in Magnetically Confined Fusion Plasmas

O. Chellaï [1], S. Alberti [1], I. Furno [1], T. Goodman [1], M. Baquero [1]
[1] Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Suisse

In magnetically confined fusion devices, electron cyclotron resonance heating (80-170 GHz) is characterized by a local RF-power deposition at the electron cyclotron resonance [1]. A mm-wave RF Gaussian beam is launched from a dedicated antenna and propagates through the highly turbulent scrape-off layer (SOL) at the edge of the confined plasma. Turbulence in the SOL is characterized by ...