Technical Papers and Presentations

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 impliquet des phénomènes électriques, mécaniques, fluidiques et chimiques. utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Thermal and Velocity Field Analysis Inside an Historical Building - The Hall of the Two Hundred

C. Balocco
Energy Engineering Department, Firenze

For museums and the like, the indoor climatic conditions should preserve the exhibited works of art and ensure comfort conditions for people visiting or working inside them. The present paper concerns a primary study of the Hall of the Two Hundred of the Old Palace in Florence. General 3D modeling principles were used, which can be applied to many situations where there is interaction ...

Combined Transfer Phenomena in 3D Modeling of Packaged Foods

M.V. De Bonis[1,2], G. Altieri[2], and G. Ruocco[1,2]
[1] CFDfood
[2] DITEC, Università degli studi della Basilicata, Potenza

Heat and mass transfer can be analyzed for conditions that may limit shelf-life. With this target, the purpose of the present work is the development of a general model which is applicable to a large variety of packaging configurations, food products and environmental conditions. To this end, COMSOL Multiphysics is exploited in a full 3D geometry.

Optimization of BCP Processing of Elliptical Nb SRF Cavities

C. Boffo[1], C. Cooper[1], G. Galasso[2], and A. Rowe[1]
[1] FNAL, Batavia, IL 60510, U.S.A.
[2] Università degli Studi di Udine

Buffer chemical polishing is a cheap, simple and effective processing technique for single grain high gradient and polycrystalline lower gradient cavities. This paper describes the thermal-fluid finite element model adopted to simulate the process, the experimental flow visualization tests performed to verify the simulation and a novel device fabricated to solve the problem.

3D Simulation and Experimental Comparison of Temperature Dynamics in Laser Welded Cornea

F. Rossi[1], R. Pini[1], and L. Menabuoni[2]
[1] Istituto di Fisica Applicata, CNR, Firenze
[2] U.O. Oculistica, Prato

3D model analysis of the temperature dynamics during a welding process is presented. Bio-heat equation described laser-tissue interaction in porcine and human eyes, simulating the surgery conditions. The modeled behavior of the superficial cornea temperature was compared with direct measurements performed by an infrared thermo-camera. The results indicated a selective, spatially-confined ...

Modeling and Simulation in Bio-Electronics

M. Longaretti, G. Marino, and R. Sacco
Politecnico di Milano

In this communication, we deal with the numerical simulation of Voltage Operated ionic Channels (VOC) in Bio-Electronics. Suitable functional iteration techniques for problem decoupling and finite element methods for discretization are proposed and discussed. Model and computational procedures are validated in the simulation of a real-life VOC under several working conditions.

Reactor Design Improvements for a Propane Autothermal Reformer by Simulation of Momentum Flow

F. Cipitì, L. Pino, A. Vita, M. Laganà, and V. Recupero
CNR-ITAE, Messina

The paper presents a two-dimensional model to describe the gas flow in a propane autothermal reactor, developed at the CNR-ITAE Institute, and aimed to design a Beta 5 kWe hydrogen generator, named HYGen II, to be used with Polymer Electrolyte Fuel Cells (PEFCs) for residential applications. The main aim of the mathematical model was to optimize the reactor geometrical key parameters (diameter ...

Numerical Simulation of RTD in Contact Tanks with COMSOL Multiphysics

C. Gualtieri
University of Napoli

The objective of this paper is to present the results of a numerical study undertaken to investigate the hydrodynamics and turbulent transport and mixing inside two contact tanks, which have the same channels but different location of the baffles. Transient concentration data were used to derive the residence time distribution (RTD) function for both tanks in order to evaluate and compare ...

Influence of Geometry on Mixing in a Passive Micromixer

E. Giuri, A. Ricci, and C. Ricciardi
Laboratorio di Technologie Elettrobiochimiche Miniaturizzate per l'Anilisi e la Ricerca, Politechnico di Torino

Finite Element Method simulations of microstructure behaviour is carried out by COMSOL. This enables us to make also technological considerations related to the easy way of fabrication and to lower production costs as explained in the following slide.

Simulation of the Inverse Extrusion of Brass Rod by the Coupling of Fluid Mechanical, Thermal and ALE Modes

C. Mapelli, and L. Bergami
Dipartimento di Meccanica, Politecnico di Milano

The complete coupling among the Incompressible Navier-Stokes - General Heat Transfer -ALE modes can be a reliable tool for the simulation of the plastic deformation process. This is shown here.

Finite Element Analysis of Electro-mechanical Deflection of Cantilevers for SPM and MEMS Applications

D. Moro, and G. Valdrè
University of Bologna

The understanding of the distribution of electrostatic forces at the nanoscale is of fundamental importance for the development of nanotechnology. In this work, in order to quantify the EFM cantilever/tip-sample interaction, we present a 3D static Finite Element Analysis of the electromechanical interaction between conductive probes and samples, using COMSOL Multiphysics. The simulation ...

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