Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Finite Element Study of the Mass Transfer in Annular Reactor - new

Y. M. S. El-Shazly[1], S. W. Eletriby[1]
[1]Alexandria University, Alexandria, Alexandria, Egypt.

The annular reactor is a very useful design to carry many chemical reactions. In this study, COMSOL Multiphysics® software was used to study the isothermal mass transfer from the inner side of the outer tube of the annular reactor in the range of 200

Diffusion and Reaction in Fe-Based Catalyst for Fischer-Tropsch Synthesis Using Micro Kinetic Rate Expressions - new

A. Nanduri[1], P. L. Mills[1]
[1]Department of Chemical & Natural Gas Engineering, Texas A&M University, Kingsville, TX, USA

Fischer-Tropsch synthesis (FTS) is a highly exothermic polymerization reaction of syngas (CO+H2) in the presence of Fe/Co/Ru-based catalysts to produce a wide range of paraffins, olefins and oxygenates, often known as syncrude. Multi-Tubular Fixed Bed Reactors (MTFBR) and Slurry Bubble Column Reactors (SBCR) are widely employed for FTS processes. The scale-up of MTFBR is complicated by the ...

Model of Heat and Mass Transfer with Moving Boundary During Roasting of Meat in Convection-Oven

A.H. Feyissa[1], J. Adler-Nissen[1], and K.V. Gernaey[2]
[1]Food Production Engineering, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
[2]Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

A 2D mathematical model of coupled heat and mass transfer describing oven roasting of meat was formulated from first principles. The current formulation of model equations incorporates the effect of shrinkage phenomena and water holding capacity. The model equations are based on conservation of mass and energy. The pressure driven transport of water in meat is expressed using Darcy’s equation. ...

Multiphysics Modeling of Warm-Air Drying of Potatoes Slices

S. Sandoval Torres[1], A. de Lourdes Allier González[1], L.L. Méndez Lagunas[1]
[1]Instituto Politécnico Nacional, CIIDIR, Oaxaca, Mexico

In this work we solve a model to simulate the drying of potatoes slices. The model considers both the transport of free and vapor water by applying a mechanistic approach. The critical moisture point (CMP) was considered, since it is a transition zone and it represents the point where water saturation is near from cero and hygroscopic domain begins. The CMP divides the hygroscopic and non ...

A Model of Heat Transfer in Metal Foaming

Bruno Chinè [1], Valerio Mussi [2], Michele Monno [3], Andrea Rossi [2],
[1] School of Materials Science and Engineering, Costa Rica Institute of Technology, Cartago, Costa Rica
[2] Macchine Utensili e Sistemi di Produzione, Piacenza, Italy
[3] Dipartimento di Meccanica, Politecnico di Milano, Milano, Italy

Metal foams are interesting materials with many potential applications. Foamed metals or alloys include gas voids in the material structure and therefore the density is introduced as a new variable, with the real possibility to modify ad hoc their physical properties. In the indirect foaming process carried out in a furnace, simultaneous mass, momentum and energy transfer between three phases, ...

Modeling Degradation in Lithium-Sulfur Batteries

R. Purkayastha [1], G. Minton [1], L. O'Neill [1], S. Walus [1], M. Wild [1], M. Marinescu [2], T. Zhang [2], G. Offer [2]
[1] Oxis Energy Ltd, Culham Science Centre, Abingdon, Oxfordshire, United Kingdom
[2] Mechanical Engineering Department, Imperial College, London, United Kingdom

Two Anode Surface processes are examined : Formation of Solid Electrolyte Interphase (SEI) and heating due to Shuttle Current. During charging, higher order sulfur species are reduced at the anode surface, while they are concurrently being oxidized at the cathode. This leads to the formation of a parasitic ‘shuttle’ current. We show that heating due to this shuttle current can lead to large ...

Transdermal Drug Delivery with Permeation Enhancer

A. Kermani [1], N. Elabbasi [1]
[1] Veryst Engineering, Needham, MA, USA

Transdermal drug delivery (TDD) is used to deliver drugs through the skin as an alternative to oral, intravascular, and subcutaneous routes. While there are many advantages to TDD, skin is a very effective barrier and provides resistance to drug delivery. To improve drug delivery through the skin, permeation enhancers are used. We developed an axisymmetric COMSOL Multiphysics® software model ...

Advanced Modeling of Friction Stir Welding – Improved Material Model for Aluminum Alloys and Modeling of Different Materials with Different Properties by Using the Level Set Method

S. Dörfler
Wilhelm Gronbach GmbH, Wasserburg a. Inn, Germany

Friction Stir Welding (FSW) has gained much importance throughout the last years. Beside comprehensive experimental work that has been carried out, the simulation of the welding zone is of major interest.  Due to the high strains observed within the welding zone, the Eulerian (CFD) approach seems to be the most promising for the prediction of flow around the FSW tool. However, the CFD ...

Stochastic Diffusion of Calcium Ions Through a Nanopore in the Cell Membrane Created by Electroporation - new

O. Henao[1], V. Gómez[1], I. De La Pava[1], J. Sánchez [1]
[1]Grupo Fisiología Celular y Aplicada, Universidad Tecnológica de Pereira, Pereira, Risaralda, Colombia

We simulated the diffusion of calcium ions through a nanopore created in the cell membrane by electroporation, in presence and absence of the external electric field responsible of the membrane permeabilization. First we solved the set of coupled differential equations that describe the process of ionic diffusion in a 2D nanopore model using the AC/DC Module and the Transport of Diluted Species ...

Two-Phase Flow Models of Gas Generation and Transport in Geological Formations

O. Silva [1]
[1] Amphos 21 Consulting S.L. - iMaGe Consortium, Barcelona, Spain

Gas generation and transport through porous media is a process common to many field applications such as radioactive waste and underground gas storage. In these operations, the gas phase evolution depends on the thermodynamic conditions at depth, the properties of the fluids (density, viscosity, surface tension) and the geological formation (permeability, porosity, retention curve), as well as ...