M.V. De Bonis[1,2], G. Altieri, and G. Ruocco[1,2]
 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.
N. Diaz1, F. Goutelard1, and P.Turq2
1CEA/DEN/DPC/SECR/L3MR, CEN Saclay, Gif-sur-Yvette, France
2LI2C, Université Pierre et Marie Curie, Paris, France
The argillite formation has been proposed as a potential host rock for deep radioactive waste disposal. These materials have very low permeability and diffusion is likely to be the predominant transfer mechanism for solute migration.The negatively charged surface of the clays induces unexpected behaviour of the ions: while the anions diffuse slower than HTO, the transport of the cations is ...
Estimating the Ore Volume in AC Smelting Furnaces Using Finite-Element Analysis of Surface Current Density
A. Mohammed, and A. Jeremic
McMaster University, Hamilton, L8S4K1, Canada
One of the primary reasons for large power fluctuations in smelting furnaces is loss of contact between the electrode and ore. Therefore one of the important aspects of controlling power fluctuations is a predictive algorithm for the positioning of the electrode. We propose a model-based approach – using a COMSOL Multiphysics coupled thermo-electromagnetic model – that ...
Modeling of Coupled Fluid Flow and Shear-induced Solidification Kinetics in Rheocasting of Aluminium Alloys
G. Maizza, and G. Lorenzatto
Politecnico di Torino
Dipartimento di Scienza dei Materiali ed Ingegneria Chimica
The model proposed by Schneider et al., for polymers is herein adapted in order to assess its suitability in elucidating the thixotropic behavior of aluminum alloys. The COMSOL Multiphysics program is employed to solve the inherent coupled mathematical problem, consisting in the kinetic ordinary differential equations and the momentum and energy transport partial differential equations. The ...
Study of a Self Heating Process of Tetrafluoroethylene by the Exothermic Dimerization Reaction to Octafluorocyclobutane
M. Beckmann-Kluge, H. Krause, V. Schröder, A. Acikalin, and J. Steinbach
Federal Institute for Materials Research and Testing, Berlin, Germany
Technical University Berlin, Berlin, Germany
The self heating process of Tetrafluoroethylene caused by an exothermic dimerization reaction was studied. The heat of reaction can lead to a thermal explosion by the decomposition of the Tetrafluoroethylene. Different reaction kinetics, including multistep kinetics, were used to describe the mass balance. The COMSOL Chemical Engineering Module was used to perform the simulation which was ...
S.V. Aher, P. Devillers, G. Fau, B. Tranain, and C. Buisson
Centre des Matériaux de Grande Diffusion, Ecole des Mines d’Alès, Alès cedex, France
Indian Institute of Technology Kanpur, Kalyanpur, Kanpur, Uttar Pradesh, India
Centre Scientifique et Technique du Bâtiment, France
Surface coating can fullfil their function satisfactorily over an extended period of time only if there is a good bond between the concrete substrate and the coating. The most numerous cases of blistering affect the airtight covers of the concrete subjected to negative pressures of humidity from the support. The general objective of this study is the understanding of the blistering phenomenon. ...
Influence of COMSOL on the Design and Testing of the High Flux Isotope Reactor HB-4 Cold Source: Validation of the Simulation
J. D. Freels
Oak Ridge National Laboratory
This presentation concerns our numerical and experimental research on the High Flux Isotope Reactor HFIR, located at the Oak Ridge National Laboratory. In this presentation we give a Brief Pictorial Introduction to the HFIR, som physical properties of Supercritical Hydrogen, and Simulations of both natural and forced convection problems using COMSOL Multiphysics. This presentation also ...
R. Winz, N. Schröder, W. Wiechert, and E. von Lieres
Institute of Biotechnology 2, Research Centre Jülich, Jülich, Germany
Research Center for Micro and Nanochemistry, University of Siegen, Siegen, Germany
In recent years lab-on-microchip technology has become a powerful tool for micro-scale analysis of biochemical processes. In the studied system the overall process consists of transport, convection, diffusion, reaction and adsorption processes. Two compounds A and B, contained in a carrier fluid (buffer), are introduced into a reaction channel via a Y-shaped double-inlet. As the streams flow ...
N. Jand, A. Scarpetta, and M. Stefano
Chemical Engineering Department, University of L’Aquila, L’Aquila, Italy
Faculty of Engineering, University of L'Aquila, L’Aquila, Italy
The modeling of sublimation form a rotating cylinder of solid naphthalene in a confined vessel has been performed by coupling the model of incompressible Newtonian fluid flow with the model of the dilute solutions. Preliminary a 2D axisymmetric system with swirl flow function for laminar and turbulent regimes has been considered. In the turbulent regime the RANS model with default parameter is ...
P. Silva, J.A. Ferreira, P. de Oliveira
Coimbra Institute of Engineering, CMUC, Coimbra, Portugal
Department of Mathematics University of Coimbra, CMUC, Coimbra, Portugal
The aim of the poster is to present a coupled 2D mathematical model to predict the evolution of drug concentration - in the cornea and in the anterior chamber of the eye - when therapeutic lenses are used (Figure 1). The mathematical model takes into account (i) diffusion processes in several compartments of the eye (therapeutic lens, cornea and anterior chamber); (ii) metabolic consuming ...