In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.

From CT Scan to Plantar Pressure Map Distribution of a 3D Anatomic Human Foot

S. Gerbino, and P. Franciosa
University of Molise, School of Engineering, Via Duca degli Abruzzi, Termoli, Italy

Understanding the stress-strain behavior of human foot tissues and pressure map distributions at the plantar interface is of interest into biomechanical investigations. In particular, monitoring plantar pressure maps is crucial to establishing the perceived human comfort of shoe insoles. A 3D anatomical detailed FE human foot model was created, starting from CT (Computer Tomography) scans of a ...

Heat Output From Space Heating Radiator With Add-On-Fan Blowers

P-O. Johansson, and J. Wollerstrand
Lund University, Lund, Sweden

In a hydronic space heating system the heat output arises from natural convection and radiation from the radiators. In order to increase the heat output, without replacing the radiators with larger ones, or increasing the temperature level, the radiator can be equipped with add-onfan blowers. In the latter case, the heat output from the radiator will increase due to increased convection. This ...

Numerical Simulation of Magnetic Drug Targeting with Flow – Structural Interaction in an Arterial Branching Region of Interest

A. Morega, A. Dobre, and M. Morega
University Politehnica of Bucharest, Bucharest, Romania

We report a numerical study on the blood – magnetic carrier aggregate flow in an external magnetic field, for applications such as magnetic drug targeting. The arterial system morphology is complex and patient-related therefore more realistic numerical simulations request medical image-based reconstruction to generate computational domains. Simpleware package is used to generate the ...

A Model of Gas Bubble Growth by COMSOL Multiphysics

B. Chinè[1,2], and M. Monno[1,3]
[1]Laboratorio MUSP, Macchine Utensili e Sistemi di Produzione, Piacenza, Italy
[2]Instituto Tecnològico de Costa Rica, Escuela de Ciencia e Ingenierìa de Materiales, Cartago, Costa Rica
[3]Politecnico di Milano, Dipartimento di Meccanica, Milano, Italy

We use COMSOL Multiphysics to model a gas bubble expansion in a viscous liquid initially at rest, a very common system for lightweight foamed materials from metal production and polymer processing. Modelling and simulation of foam processing during the production step involves many complexities, mainly due to the coupled momentum, mass and energy transport mechanisms, presence of more phases in ...

Modeling of High Temperature Superconducting Tapes, Arrays and AC Cables Using COMSOL

O. Chevtchenko
Technical University of Delft, The Netherlands

In this paper we present a set of numerical models created with COMSOL Multiphysics. The set includes quantitative models of a superconducting tape operated at 77 Kelvin, carrying a transport current and exposed to external magnetic field; an array of such tapes and a triaxial high temperature superconducting cable. Similar models were created in the past. However, an advantage of our approach ...

Finite Element Analysis Of Permeation Tests On Articular Cartilage Under Different Testing Conditions Using COMSOL Multiphysics

G. Spatafora[1], and F. Boschetti[1][2]
[1]Structural Engineering Department, Politecnico di Milano, Milan, Italy
[2]IRCCS Istituto Ortopedico Galeazzi, Milan, Italy

Articular cartilage is composed by a charged solid matrix (proteoglycan and collagen fibres) and an interstitial fluid phase. The permeability of articular cartilage is a function of compression load applied on the tissue, the solid matrix underwent a compaction that decreased its value for increasing deformation. The study of the permeability is very useful to understand the onset and ...

COMSOL Assistance For The Determination Of Pressure Drops In Complex Microfluidic Channels

J. Berthier, R. Renaudot, P. Dalle, G. Blanco-Gomez, F. Rivera, P. Caillat, and V. Agache
CEA-LETI, Grenoble, France

With the current trend towards always more complexity associated to more functionalities in biotechnological systems, it is required to know with accuracy the pressure drop in the circuitry of microfluidic systems. In general, a full three-dimensional calculation is not tractable due to the limited capacity of the computers. However, computational models can help to produce pressure drop ...

Identification of the Complex Moduli of Orthotropic Materials using Modal Analysis

F. Van den Abeele[1], J.R. De Oliveira Jr.[2], and F.J. Huertos[1]
[1]OCAS N.V., J.F. Kennedylaan 3, Zelzate, Belgium
[2]Federal University of Minas Gerais, Belo Horizonte, Brazil

It is very difficult to measure the global properties of heterogeneous and anisotropic materials like composites and sandwich structures. When designing composite sandwich applications, the elastic properties are required to perform structural stiffness and strength calculations. However, due to their anisotropic nature, it is not straightforward to measure these properties with traditional ...

Formation Of Porosities During Spot Laser Welding : Case Of Tantalum Joining

C. Touvrey
CEA Valduc, France

During the welding of tantalum with a ND: YAG pulsed laser, a deep and narrow cavity, called the keyhole, is formed. At the end of the process, surface tension forces provoke the collapse of the keyhole. For important interface deformations, gas bubbles can be trapped into the melting pool. If the solidification time is insufficient, these bubbles give birth to residual porosities. The aim of ...

Prediction of Transformer Load Noise

M. Kavasoglu[1], R. Haettel[1], and C.H. Ploetner[2]
[1]ABB Corporate Research, Västerås, Sweden
[2]ABB Transformers, Varennes, Canada

Transformers, as any other industrial products, have to comply with various requirements on noise levels. Three main sources of noise can be identified in transformers: no-load noise or core noise generated by magnetostriction in the core steel laminations, load noise produced by electromagnetic forces in the windings and noise due to auxiliary equipment such as fans and pumps used in the ...