Presentazioni e Articoli Tecnici

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.

A Computational Investigation of Flow - Mechanical Energy Loss: Relevance to the Total Cavopulmonary Connection

Wiesman, J.P.1, Hamlington, K.L.1, Gaver, D.P.1, Ross-Ascuitto, N.T.2, Ascuitto, R.J.2
1 Tulane University, Department of Biomedical Engineering
2 Tulane University, Department of Pediatrics and Physics

The “Total Cavopulmonary Connection (TCPC)”, or Fontan operation, has become the surgical treatment of choice for children with functional single-ventricle heart disease. We assessed fluid energetics relevant to TCPCs using the computational fluid-dynamics package FEMLAB 3.1 (COMSOL, Inc., Burlington, MA) to describe non-pulsatile flow through a conduit, taken to represent an obstructed ...

Calibrating electric instruments of the Huygens probe and modelling the dielectric properties of the atmosphere and of the surface of titan

Simões, F.
Centre d'Etude des Environnements Terrestre et Planétaires (CETP), Saint Maur des Fossès, France

In 14 January, 2005, the Huygens Probe has descent through the atmosphere of Titan and has survived to touchdown, collecting data in the atmosphere and on the surface of the largest moon of Saturn. One of the instruments, the Huygens Atmospheric Structure Instrument (HASI), includes the Permittivity, Waves, and Altimetry (PWA) analyser, which is a subsystem for studying the electric activity of ...

Analysis of Cell Deformation with FEMLAB

El-Khatib, N.1, Huc, N.2, Goldberg, Y.3, Cedex Martiel, J.L.1
1 TIMC Laboratory, UMR CNRS 5525, Faculty of Medicine, La Tronche
2 COMSOL, Grenoble
3 INSERM EMI 01-08, Grenoble University Hospital, Grenoble

We present a simplified model of biological cells including a first layer, corresponding to the membrane and the actin cortex and a second one, representing the cell cytoplasm. The membraneactin ensemble is governed by the Navier equations while the cytoplasm is assimilated to a viscous fluid, described by the Navier-Stokes system. At the inner boundary, between the cortex and the cytoplasm, ...

Computer Simulations of Flows in Curved Tubes with Stenosis

Liu, B.
Department of Mathematics, Monmouth University, West Long Branch, NJ

Pulsatile blood flows in curved atherosclerotic arteries are investigated by computer simulations. Three-dimensional incompressible Navier Stokes equations are solved using FEMLAB. The flexibility of FEMLAB enables us to do the computations with various flow parameters and different boundary conditions at the outlet. This paper presents the blood flow patterns in the curved arteries with or ...

Accelerated Virus Capture to Surfaces Inside Physiological Media by using AC Electrokinetic Effects

Zhang, B., Docoslis, A
Department of Chemical Engineering, Queen’s University, Kingston, ON Canada

This paper presents a numerical investigation of the mechanism by which nonuniform electric fields, created by planar microfabricated electrodes, can cause accelerated transport and capture of virus to a surface inside media of physiological ionic strength. Numerical calculations presented here suggest that the primary mechanism of expeditious virus transport from the bulk of a sample to the ...

Multiphysics for Life Sciences and Health Care: Simulation Examples

Glière, A., Gros d’Aillon, E., da Silva, A.
LETI – CEA Direction de la Recherche Technologique, PA

Numerical simulation, especially by the Finite Element Method, is widespread in research and development laboratories. Three examples of the use of FEMLAB, in fields as diverse as gamma-ray detection by room-temperature semiconductors, fluorescence-enhanced Diffuse Optical Tomography and microfluidic valve for Lab-on-a-Chip, are presented in this paper.

A Mass-consistent Atmospheric Model using FEMLAB Optimization

Wang, X., Pepper, D.W.
University of Nevada, Las Vegas, Department of Mechanical Engineering, Las Vegas, NV

The assurance of mass consistency in constructing 3-D atmospheric velocity fields is important when developing accurate numerical simulations. The implementation of a mass consistent wind field is typically undertaken using available meteorological data obtained from instrumented towers and remote sensors. In this study, two methods are presented and compared for constructing 3-D mass ...

A finite–element simulation study of the complex effective permittivity of two-phase random composite materials

Brosseau, C.
Laboratoire d'Electronique et Systèmes de Télécommunications, Université de Bretagne Occidentale, Brest, France

In the current work we introduce a finite-element method (FEM) for calculating the effective permittivity of macroscopically inhomogeneous media. Specifically, we consider two-dimensional (2d) two-phase heterostructures consisting of hard circular disk equilibrated distributions. The hard-disk distribution has been chosen as the reference system since it is one of the simplest idealized models ...

A finite–element simulation study of the complex effective permittivity of two-phase random composite materials

Brosseau, C.
Laboratoire d'Electronique et Systèmes de Télécommunications, Université de Bretagne Occidentale, Brest, France

In the current work we introduce a finite-element method (FEM) for calculating the effective permittivity of macroscopically inhomogeneous media. Specifically, we consider two-dimensional (2d) two-phase heterostructures consisting of hard circular disk equilibrated distributions. The hard-disk distribution has been chosen as the reference system since it is one of the simplest idealized models ...

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