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.

Modeling the Behavior of Single Particle during Drying Process

S. Bellur, B. Agasanpura, and C. Coronella
Chemical and Metallurgical Engineering Department, University of Nevada, Reno, Nevada, USA

The aim of the present work is the formulation of a computational model describing transport phenomena in transient biosolids drying. COMSOL Multiphysics was used to perform the simulations, with two spatial dimensions. After a time step of 0.1 s, we found that the solid reached thermal equilibrium with the surrounding gas, which is consistent with empirical correlations.

Temperature Excursions at the Pulp-Dentin Junction during the Curing of Light-Activated Dental Restorations

M. Jakubinek[1,2], C. Neill[1], C. Felix[3], R. Price[2,3], M. White[1,2]

[1]Departments of Chemistry and Physics, Dalhousie University, Halifax, NS, Canada
[2]Institute for Research in Materials, Dalhousie University, Halifax, NS, Canada
[3]Department of Dental Clinical Sciences, Dalhousie University, Halifax, NS, Canada

Heat produced during the curing of light-activated dental restorations could damage the dental pulp. Given the prevalence of composite restorations and the importance of avoiding injury to the pulp, efforts should be made to minimize the temperature increase that occurs at the pulp-dentin junction during light-curing. In this investigation we develop and evaluate a COMSOL Multiphysics FEM tooth ...

Lava Tubes at Shallow Depth

M. Di Bari, and G. Zito
University of Bari, Italy

Many theoretical studies concerning lava tubes focus on the thermal disturbances generated on the earth surface. Recently a solution was suggested, where a lava tube located at a great depth h in the soil, where the ratio between h to the major axis of the ellipse a is higher than 10. However, lava tubes more frequently are located at shallower depths.  In this work we ...

Simulations of Hydrogen Cross Field Plasma Switch

M. Zhang
China Electronics Technology Group Corporation, China

With this presentation, some content has been discussed from several parts as follows: 1. Plasma switches are introduced by their derivation and types, and the operating mechanism of Hydrogen cross field plasma switch is indicated then. 2. The related theories of Hydrogen plasma to simulate a DC discharge have been discussed. 3. Hydrogen simulation model is established from two aspects: A: Fixed ...

Thermal Analysis of Electrorefiner for Engineering Scale Pyroprocessing Studies

S. Agarwal, S.P. Ruhela, V. Mente, M.G. Hemanath, B. Murlidhran, V.S. Kumar, C.P. Reddy, G. Ravisankar, B.K. Sharma, K. Nagarajan, C.A. Babu, and P. Kalyanasundaram
Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

Pyrochemical process based on molten salt electrorefining is ideally suited for reprocessing spent metallic fuels from Fast Breeder Reactors. In this work, a heat transfer analysis of the Electrorefiner cell was conducted to develop a basic tool for designing of the engineering–scale Electrorefiner. The focus of this work is to find out steady state temperature profiles of cover gas and molten ...

COMSOL Implementation for Upscaling of Two-Phase Immiscible Flows in Communicating Layered Reservoirs

X. Zhang, A. Shapiro, and E.H. Stenby
Center for Energy Resources Engineering, Technical University of Denmark, Lyngby, Denmark

Waterflooding is widely used in secondary oil recovery. The physics is described by the model of two-phase flow in porous media. The aim of the present work is to implement this model in COMSOL Multiphysics and to simulate the process of waterflooding. It is analyzed in two dimensions. We use layered reservoir in our study. The numerical implementation is validated, comparing with analytical ...

ComsolGrid – A Framework For Performing Large-Scale Parameter Studies Using COMSOL Multiphysics and Berkeley Open Infrastructure for Network Computing (BOINC)

C.B. Ries, and C. Schröder
University of Applied Sciences Bielefeld, Germany

BOINC (Berkeley Open Infrastructure for Network Computing) is an open-source framework for solving large-scale and complex computational problems by means of public resource computing (PRC). In contrast to massive parallel computing, PRC applications are distributed onto a large number of heterogeneous client computers connected by the Internet where each computer is assigned an individual task ...

Modeling Bacterial Transport and Removal in a Constructed Wetland System

E. Engström, B. Balfors, and R. Thunvik
Royal Institute of Technology, Stockholm, Sweden

In this study we evaluate transport, retention and subsistence of Escherichia coli (E. coli), a common fecal indicator bacteria, in a model (2x1m) of a constructed wetland. Transport occurs in the unsaturated and saturated zone. Inactivation is accounted for as a kinetic first-order process. Retention is assumed to be dominated by solid-air-water interface straining and is modeled with a kinetic ...

Stress Analysis of an Electromagnetic Horn

B. Lepers
IPHC
Université de Strasbourg
Strasbourg, France

An electromagnetic horn is a device used in particle physics to produce a strong pulsed toroidal magnetic field and to focus charged particles toward a detector. A multiphysics analysis is performed to assess the stress level inside the horn structure. In steady state regime, the horn is submitted to a thermal static stress due to thermal dilatation. Then, every 80 ms a strong magnetic field ...

Numerical Modelling of Compact High Temperature Heat Exchanger

O. Smirnova, T. Fend, and D. Schöllgen
Institut of Solar Research in German Aerospace Agency
Cologne, Germany

For the numeric investigations of the high temperature compact heat exchanger two numeric models with and without the regards of the velocity field development were used. The results of the comparison of the numeric and experimental data confirm the necessity of regarding the velocity field development for the compact heat exchangers. The two-dimensional simulation task with the regard of ...

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