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.

Perforation Effect on a Rectangular Metal Hydride Tank for Hydriding and Dehydriding Process

E. Gkanas[1][2], S. Makridis[1][2], E. Kikkinides[1], A. Stubos[2]
[1]Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece
[2]Environmental Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR 'Demokritos', Agia Paraskevi, Athens, Greece

Hydrogen storage in a metal hydride bed, uses an intermetallic alloy that can absorb efficiently high amounts of hydrogen by chemical bonding resulting to metal hydrides. This alloy is capable of absorbing and desorbing hydrogen while maintaining its own structure. The heat, mass and momentum transfer in a metal-hydride reactor is mathematically described by energy, mass and momentum balance ...

Numerical Simulation of Evaporation Processes in Electron Beam Welding - new

E. Salomatova[1], D. Trushnikov[1], V. Belenkiy[1], V. Tsaplin[1]
[1]Perm National Research Polytechnic University, Perm, Russia

In this paper describes an original method for indirect measurement of the vapor pressure and temperature in the keyhole in electron beam welding. This method is based on the determination of the concentration of chemical elements in the vapor above the welding zone. Taking into account these data model is built 2D diffusion processes with heat and mass transfer elements in the melt, which ...

Modeling Maillard Reaction and Thermal Transformations During Bread Baking

D. Papasidero[1], F. Manenti[1]
[1]Politecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, Milano, Italy

One big challenge for the food industry is to predict and optimize flavors. The Maillard reaction occurs in food matrices containing carbohydrates and proteins under specific operating conditions. The presented research couples thermal and kinetic modeling to the bread baking process, an ideal field to study this complex set of reactions responsible for many bread flavors. The thermal model ...

The Use of CFD to Simulate Turbulent Flows in Laboratory and Full Scale Flocculation Processes

A.H. Ito[1], O.T. Kaminata [1], S.R. Lautenschlager[1]
[1]State University of Maringá, Maringá, Paraná, Brazil

The hydraulic flocculates are employed in water treatment plants (WTPs), but may present problems during the mixing stage reducing the efficiency of treatment. In this context modeling of a hydraulic flocculate using COMSOL and a 1:10 scale model of the Maringá-PR Brazil city WTP flocculate was done. The WTP flocculate is shown in figure 1 and the model illustrating the acrylic flocculate ...

Improving the Sensoring of PEM Fuel Cell by Numerical Techniques - new

S. Skoda[1], E. Robalinho[2], E. F. Cunha[1], M. Linardi[1]
[1]Instituto de Pesquisas Energéticas e Nucleares - IPEN/CNEN-SP, São Paulo, SP, Brazil
[2]Universidade Nove de Julho - UNINOVE, São Paulo, SP, Brazil

The use of numerical techniques in PEM fuel cell sensoring represents an advantage of project engineering, reducing the costs and accelerating the manufacturing of prototypes. In this work some numerical responses are shown, relating to numerical sensoring of water and oxygen mole fractions at cathode of a 5 cm² of geometric area PEM fuel cell. The need to recognize a geometric figure of merit ...

Simulation and Experimental Analysis of Drug Release Rates from Magnetic Nanocomposite Spheres - new

L. Saeeednia[1], H. Mehraein[2], F. Abedin[1], K. Cluff[2], R. Asmatulu[1]
[1]Department of Mechanical Engineering, Wichita State University, Wichita, KS, USA
[2]Department of Bioengineering, Wichita State University, Wichita, KS, USA

Targeted drug delivery systems have been wildly studied in cancer therapy due to the toxicity of most of chemotherapeutic drugs. Nanoparticles can be attached to the small molecules of the drugs and serve as drug carriers to deliver the drug molecules into the area of interest. In this research, polymeric microspheres containing biodegradable poly(D, L-lactide-co-glycolide) (PLGA), magnetic ...

Fluid Flow and Heat Transfer Characteristics in a Stirred Cell System for Crude Oil Fouling

M. Yang[1], A. Young[1], and B. Crittenden[1]

[1]Department of Chemical Engineering University of Bath, Bath, United Kingdom

A small batch stirred cell which is operated at temperatures up to 400 °C and pressures up to 30 bar is used to study fouling behaviors of selected crude oils. COMSOL Multiphysics package is used for the CFD (Computational Fluid Dynamics) and heat transfer modeling for this stirred cell system. The simulation results are validated against the measured temperature data at various axial ...

A Study of Thermo-Fluid Behavior in Tubular Metal Hydride Beds in the Hydriding Process

S. Makridis[1], E.I. Gkanas[1], A. Ioannidou[2], E.S. Kikkinides[2], A.K. Stubos[3]
[1]Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece & Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR “Demokritos”, Athens, Greece
[2]Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece
[3]Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR “Demokritos”, Athens, Greece

Hydrogen, the most abundant element in the universe, has great potential as an energy source, and can be generated from renewable energy sources. We used COMSOL for the solution of the energy, mass and momentum balance equations that describe the hydrogen absorption and desorption procedure in the metal hydride compressor. Thermodynamic or engineering properties like the reaction enthalpy ??, ...

Modeling of an Oxygenation-Aided 3D Culture for Functional Beta-Cell Expansion

S. Jin[1], J. McReynolds[1], X. Li[2], J. Guan[2]
[1]Department of Biomedical Engineering, College of Engineering, University of Arkansas, Fayetteville, AR, USA
[2]Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA

Currently, researchers are looking for ways to mass-produce biologically functional pancreatic beta cells in vitro because of the shortage of donor tissue needed for diabetes cell therapy. The beta cells will become hypoxic if their high oxygen demands are not met. We hypothesized that the biological function of beta cells can be improved if they are cultured in a 3D collagen scaffold, which ...

Coupled Palaehydrogeological Microbial and Geochemical Reactive Transport Model of the Olkiluoto Site (Finland)

P. Trinchero[1], M. Luna[1], J. Molinero[1], G. Román-Ross[1], F. Maia[1], A. Nardi[1], J. Löfman[2], P. Pitkänen[3], L. Koskinen[3]
[1]Amphos 21 Consulting, Barcelona, Spain
[2]VTT Energy, Finland
[3]Posiva Oy, Olkiluoto, Finland

Olkiluoto at Eurajoki has been selected as the final repository site for spent nuclear waste in Finland. This area has been affected, at regional scale, by land-uplift processes related to the ice withdrawal. These events have resulted in a complex and stratified heterogeneous hydrochemical system. The objective of this work was to develop a robust paleohydrogeological reactive transport (PRT) ...