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.

Solid State Transport of Reactive Charged Particles: Application to Metal Oxidation

P. Buttin[1], B. Malki[1], P. Barberis[2], and B. Baroux[1]
[1]SIMAP/groupe SIR, CNRS, France
[2]AREVA - AREVA NP - CEZUS Research Center, France

This paper studies multicomponent transport through zirconia, assuming a chemical reaction involving electrons and oxygen vacancies defects. Classically, according to the Wagner theory for ambipolar diffusion, the electroneutrality condition in the oxide is considered. Therefore three constraints must be satisfied on the transport problem: oxide stoichiometry, electroneutrality and the source ...

Impact Assessment of Hydrologic and Operational Factors on the Efficiency of Managed Aquifer Recharge Scheme

M.A. Rahman[1], P. Oberdorfer[1], Y. Jin[1], M. Pervin[1], E. Holzbecher[1]
[1]Department of Applied Geology, Geoscience Center, University of Göttingen, Göttingen, Lower Saxony, Germany

Due to increased demands on groundwater accompanied by increased drawdowns (ca. 2-3 meters/year), technologies that use alternative water resources have been suggested for Dhaka City, Bangladesh. Preliminary studies show that managed aquifer recharge (MAR) would help in optimal use of available water resources and to reduce adverse effects of pumping in the Dupitila aquifer of the city. In this ...

Computer-aided Design of the Heating Section of a Continuous Kheer (Rice Pudding)-making Machine

S. Kadam[1], T. Gulati[2], A. Datta[1]
[1]Indian Institute of Technology, Kharagpur, India
[2]Cornell University, Ithaca, NY, USA

Kheer is a popular Indian dairy dessert prepared from concentrating milk with simultaneous cooking of rice grains. Conventional methods of preparing kheer have limited its mechanized production. Therefore, a conceptual design of continuous kheer-making machine has been prepared which among other components consists of a heating section for cooking kheer. The present study investigates the CFD ...

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 ...

Capacitive Deionization for Desalinating Complex Streams - new

D. Cardoen[1,2], B. B. Sales[1], J. Helsen[1], A. Verliefde[2]
[1]VITO, Mol, Belgium
[2]Ghent University, Ghent, Belgium

Capacitive deionization (CDI) is a desalination technology which is based on the storage of ions in the electrical double layer of a pair of oppositely polarized porous carbon electrodes, which are usually assembled using activated carbon particles (Figure 1). It is efficiently deployed for desalinating water with moderate salt content (eg in domestic water softening)[1]. To broaden its ...

Modelling of a Wool Hydrolysis Reactor - new

M. Giansetti[1], A. Pezzin[1], S. Sicardi[1], G. Rovero[1]
[1]Politecnico di Torino, Torino, Italy

The Life+ GreenWoolF project is aimed at demonstrating that green hydrolysis with superheated water is an effective way to convert wool wastes into organic nitrogen fertilizers. The core of the process is represented by the reaction tank (Figure 1) in which the hydrolyses reaction takes place. The temperature of the material during the reaction is one of the most influencing parameter and has to ...

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 ...

Desorption Simulation of a Highly Dynamic Metal Hydride Storage System

D. Wenger[1], W. Polifke[2], and E. Schmidt-Ihn[3]
[1]Wenger Engineering GmbH, Ulm, Germany
[2]Technical University of Munich, Munich, Germany
[3]Daimler AG, Kirchheim/Teck, Germany

Metal hydrides are a widely-used method for storing and releasing hydrogen chemically under moderate conditions. This paper will present how highly dynamic metal hydride storage has been simulated and optimized using COMSOL Multiphysics. It will be shown how mass, energy and momentum balances were implemented and what boundary conditions were set to resolve various scenarios. The result of the ...

Modeling of Non-Equilibrium Effects in the Gravity Driven Countercurrent Imbibition

M. Chahardowli[1], R. Farajzadeh[1], J. Bruining[1]
[1]Department of Geotechnology, Delft University of Technology, Delft, The Netherlands

One of the main mechanisms in the secondary oil migration from the source rock into oil traps is gravity driven countercurrent imbibition. Many mathematical models describe countercurrent imbibition considering local equilibrium. However, Barenblatt proposed a model to describe the effect of non-equilibrium in oil water displacement. Here, the proposed model was implemented in a gravity driven ...

Modeling of Charge Transport in Ion Bipolar Junction Transistors

A.V. Volkov[1], K. Tybrandt[1], I.V. Zozoulenko[1], M. Berggren[1]
[1]Organic Electronics, ITN, Linköping University, Norrköping, Sweden

Modeling of an ion bipolar junction transistor (IBJT) is performed using the COMSOL Multiphysics® software. Our model describes the IBJT which was developed and characterized [1]. The IBJT under consideration consists of an anion-selective collector and emitter, a cation-selective base and a neutral junction. The physical model is based on Poisson and Nernst-Planck (PNP) equations. A two ...