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.

Finite Element Analysis of Superconductive Tape by Using T-Ω Formulation

H. Arab[1], S. Memiaghe[1], C. Akyel[1]
[1]Ecole Polytechnique of Montreal, Montreal, QC, Canada

This paper deals with a numerical modelling technique based on finite elements method for computing magnetic field and current density distributions in high temperature Superconducting (HTS) tapes. The model is developed using the T-ῼ formulation for which the degree of freedom (DOF) and the CPU time decreased considerably in AC losses analysis, and it is also observe that T-ῼ formulation ...

Phase-sensitive Microcalorimetry for Study of Low-level Radioactive Sources

H. Chen-Mayer[1], R. E. Tosh[1]
[1]NIST, Gaithersburg, MD, USA

Microcalorimetry for standardizing activities of radionuclide samples entails measurements of input power heat flow from the sample cell, with the radioactive sample compared to the reference cell under balanced conditions. The measurement is susceptible to noise due to drift and 1/f effects; thus, a better result might be expected with periodic insertion of the source into the sample chamber and ...

Residual Stresses and Failure Probability of Solid Oxide Fuel Cells Due to the Sintering Process

F. Greco[1], J. van Herle[1], A. Nakajo[1]
[1]FUELMAT Group, Institute of Mechanical Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

A solid oxide fuel cell (SOFC) is composed of four layers (anode, electrolyte compatibility layer and cathode) of different ceramic materials. The anode layer is produced by tape casting, the remaining layers are deposited by screen-printing. The layers are sintered together at high temperatures. During heating up and cooling down (manufacturing process), stresses are generated in the layers due ...

Finite Element Analysis of Transient Ballistic-Diffusive Heat Transfer in Two-Dimensional Structures

S. Hamian[1], T. Yamada[2], M. Faghri[3], K. Park[1]
[1]University of Utah, Salt Lake City, UT, USA
[2]Lund University, Lund, Sweden
[3]University of Rhode Island, Kingston, RI, USA

For the last two centuries, the conventional Fourier heat conduction equation has been used for modeling a diffusive nature of macroscale heat conduction by considering the energy conservation and Fourier's linear approximation of heat flux. However, it cannot accurately predict heat transport when the length scale is comparable to or smaller than the mean free path of thermal energy carriers or ...

Use of FEM in the Design of an HTS Insert Coil for a High Field NMR Magnet

E. Bosque[1]
[1]Applied Superconductivity Center, National High Magnetic Field Laboratory, Tallahassee, FL, USA

High temperature superconductors (HTS) allow larger current densities through coil wound electromagnets, which produce higher magnetic fields. A high field HTS insert demonstration magnet is being built with high field homogeneity (~1 ppm) for application in nuclear magnetic resonance (NMR). The HTS NMR system is inserted into the bore of an existing high field magnet. A compensating Helmholtz ...

Numerical Simulation of the Lithium-Ion Battery Cell Discharge Characteristics

Z. Umar[1], D. Ledwoch[1], L. Komsiyska[1], S. Vasić[[1]
[1]EWE-Forschungszentrum für Energietechnologie e. V, Oldenburg, Germany

In general battery cells are charged/discharged using constant current or constant power expressed as C-Rates and P-Rates respectively. We are developing a single cell-level Li-Ion battery model in order to simulate the performance and the physicochemical phenomena under power discharging mode (P-Rate). The P-Rate is defined as the measure of the rate at which a battery charges/discharges ...

Numerical Study on the Acoustic Field of a Deviated Borehole with 2.5D Method - new

L. Liu[1], W.J. Lin[1], H.L. Zhang[1]
[1]State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing, China

In this paper, we use the PDE interface of COMSOL Multiphysics® software to implement the 2.5D frequency wave-number domain method to investigate the wave propagation in a deviated borehole penetrating a transversely isotropic formation. A convolutional perfectly matched layer is realized to eliminate the reflections from the artificial truncation boundary. With this method, we can obtain the ...

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 ...

COMSOL in a New Tensorial Formulation of Non-Isothermal Poroelasticity

A. Mario-Cesar Suarez[1], and V. Fernando Samaniego[2]

[1]Faculty of Sciences, Michoacan University, Morelia, Mich., Mexico
[2]Faculty of Engineering, National University of Mexico, Mexico City, Mexico

The presence of a moving fluid in a porous rock modifies its mechanical response. Poroelasticity explains how the fluid inside the pores bears a portion of the total load supported by the rock. The remaining part of the load is supported by the elastic skeleton, which contains a laminar fluid coupled to the framework by equilibrium and continuity conditions. This work introduces an original ...

Benchmarking COMSOL - Part 2: CFD Problems

Darrell Pepper
Professor of Mechanical Engineering,
University of Nevada - Las Vegas

Using COMSOL 3.5a, a set of benchmark problems requiring the use of the COMSOL Computational Fluid Dynamics (CFD) module has been simulated. Several of the problems include fluid-heat transfer interactions (Computational Heat Transfer - CHT). The four problems are: flow over a 2-D circular cylinder compressible flow in a shock tube incompressible heated flow over a 2-D backward facing step ...

Quick Search