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.
COMSOL-News-Magazine-2017
COMSOL-News-Magazine-2017-Special-edition-acoustics
COMSOL-News-Magazine-2016

Model-Based Calibration System for Direct Thermal Printing

W. Vetterling[1], and Z. Peng[1]
[1]Zink Imaging, Inc., Bedford, Massachusetts, USA

This document describes a method for maintaining the long-term calibration of a full color direct thermal printer. An essential component of the system is a thermal model created using COMSOL Multiphysics that allows fitting of color data recorded at different temperatures and exposure times to model results for the same conditions. The fitted results reveal the depth and thickness of color dye ...

Modeling Flow of Magnetorheological Fluid through a Micro-channel

N.M. Bruno[1], C. Ciocanel[1] and A. Kipple[2]
[1]Department of Mechanical Engineering, Northern Arizona University, Flagstaff, Arizona, USA
[2]Dept. of Electrical Engineering and Computer Sciences, Northern Arizona University, Flagstaff, Arizona, USA

This paper presents the approach taken through the utilization of COMSOL Multiphysics 3.5a, to develop a model that simulates the flow of a magnetorheological (MR) fluid through a micro-channel. The model was developed as an aid in the analysis of a micropump that produces flow by means of displacement of a MR fluid slug within a microchannel.

Numerical Simulation of the Functional Electromagnetic Stimulation of the Human Femoral Bone using COMSOL

Y. Haba[1], W. Kröger[2], H. Ewald[2], R. Souffrant[1], W. Mittelmeier[1], and R. Bader[1]

[1]Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University of Rostock, Rostock, Germany
[2]Institute of General Electrical Engineering, University of Rostock, Rostock, Germany

In the present study we determined the relative conductivities and permittivities of fresh cortical and cancellous bone measuring human femoral heads in different slices of 1 mm thickness. The identified conductivities of human trabecular bone are used for the electromagnetic field simulation by means of COMSOL using a Micro-Computed Tomography (Micro-CT) model. The calculated model depends on a ...

3-D Finite Element Modeling of Brain Edema: Initial Studies on Intracranial Pressure Using COMSOL Multiphysics®

X.G. Li[1], H. von Holst[1][2], J. Ho[1], and S. Kleiven[1]

[1]Division of Neuronic Engineering, KTH, Stockholm, Sweden
[2]Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden

Brain edema is one of the most common consequences of serious traumatic brain injuries which is usually accompanied with increased Intracranial Pressure (ICP) due to water content increment. A three dimensional finite element model of brain edema is used to study intracranial pressure in this paper. Three different boundary conditions at the end of Cerebral Spinal Fluid (CSF) were used to ...

A Consistent Environment for the Numerical Prediction of the Properties of Composite Materials

J. Schumacher[1], P. Fideu[2], G. Ziegmann[1], and A. Herrmann[3]
[1]TU Clausthal-Institute of Polymere Materials and Plastic Engineering, Clausthal-Zellerfeld, Germany
[2]CTC GmbH Stade, Stade, Germany
[3]Faserinstitut Bremen e.V., Bremen, Germany

The current paper focuses on the creation of a consistent environment for the numerical prediction of the physical properties of polymer composite. A limitation factor for the successful simulation of composite processes is the correct estimation of the effective properties depending on several factors such as the constituents (fiber, polymer), the process setup. The numerical prediction of the ...

Hydrogen Vehicle Leak Modelling in Indoor Ventilated Environments

A. Hallgarth[1], A. Zayer[1], A. Gatward[2], and J. Davies[2]
[1]Hazard Research & Risk Consultants Ltd, Aberystwyth, Wales, United Kingdom
[2]Independent Consultants, United Kingdom

This paper presents and discusses HazRes’ research and results associated with the simulation and modelling of hydrogen release and dispersion events in indoor enclosed environments, using COMSOL Multiphysics. HazRes has developed a gas dispersion model in COMSOL, which takes into account the effects of buoyancy, localized ventilation effects and turbulence generated by obstacles on the ...

Drying In Porous Media: Equilibrium And Non-Equilibrium Approaches For Composting Processes

A. Pujol[2], S. Pommier[3], G. Debenest[2], M. Quintard[2], and D. Chenu[1]
[1]Veolia Environnement, Limay, France
[2]IMFT, Toulouse, France
[3]INSA Toulouse, Toulouse, France

To understand origins and consequences of drying phenomenon during composting, a compositional drying model of a partially water-saturated porous media coupled with biodegradation has been developed. The different simulations carried out under COMSOL Multiphysics demonstrate the ability of the model to well describe the compositional drying of a partial water-saturated porous media and point out ...

AlN/ZnO/Silicon Structure Combining Surface Acoustic Waves And Waveguiding Layer Acoustic Wave

O. Legrani[1], O. Elmazria[1], S. Zhgoon [2], L. Le Brizoual[3], and A. Bartasyte[1]
[1]Institut Jean Lamour, CNRS-Nancy University, Vandoeuvre lès Nancy, France
[2]Moscow Power Engineering Institute, Krasnokazarmennaja, Moscow, Russia
[3]Institut des Matériaux Jean Rouxel, Université Nantes, CNRS, Nantes, France

In this work, the theoretical study for the realization of waveguiding layer acoustic waves devices based on AlN/IDT/ZnO/Silicon structure using the modeling software COMSOL Multiphysics (2D) is presented. The effect of thicknesses of AlN and ZnO thin films on the evolution of frequency response, phase velocity and electromechanical coupling is studied. The adequate structure is determined for ...

Simplifying A Model Of Short Subsequent Sections Containing A Common Detailed Cross-Section

J. Krah
AkerSolutions, Fornebu, Norway

In COMSOL Multiphysics it is possible to implement and simulate several independent models in parallel. This can be meaningful when the different models are coupled to each other by some kind of interaction. If a part of the geometries is identical in all models, this part can be reduced in that it is implemented in only one of the geometries. In the other geometries only its solution towards ...

Upgrading the HFIR Thermal-Hydraulic Legacy Code Using COMSOL

I.T. Bodey[1], R.V. Arimilli[1], and J.D. Freels [2]
[1]The University of Tennessee, Knoxville, TN, USA,
[2]Oak Ridge National Laboratory, Oak Ridge, TN, USA

Modernization of the High Flux Isotope Reactor (HFIR) thermal-hydraulic (TH) design and safety analysis capability is an important step in preparation for the conversion of the HFIR core from a high enriched Uranium (HEU) fuel to a low enriched Uranium (LEU) fuel. Currently, an important part of the HFIR TH analysis is based on the legacy Steady State Heat Transfer Code (SSHTC). The SSHTC is a ...