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.

A Mathematical Tool for Studying Drug Delivery to the Eye in Case of Glaucoma

P. Silva[1], J.A. Ferreira[2], P. de Oliveira[2]
[1]Coimbra Institute of Engineering, CMUC, Coimbra, Portugal
[2]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 ...

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 of Spiral-Tube Heat Exchangers in COMSOL Multiphysics® Software

K. O. Lund [1], S. M. Lord [2],
[1] Kurt Lund Consulting (COMSOL Certified Consultant), Del Mar, CA, USA
[2] SML Associates, Encinitas, CA, USA

A frequently occurring geometry for heat exchangers is that of a long tube wound into a helix or spiral around a core volume. There is to be heat exchange between the tube and the gases (or solids) in the core. However, the length scales of these two parts of the geometry are very different, thus complicating the interface between the tube and the core processes. Usually, the tube is too ...

Cluster Diameter Determination of Gas-solid Dispersed Particles in a Fluidized Bed Reactor

M. Das
Department of Biotechnology, PESIT, Bangalore, Karnataka, India

Clustering is a common hydrodynamic characteristic observed among suspended gas-solid particles in a fast fluidized bed (FFB) regime of a circulating fluidized bed (CFB) system. In this paper clustering behavior has been studied with Geldart group B particles like coal and iron ore in a circulating fluidized bed of diameter 0.1016 m and height 5.62 m. The cluster size when calculated from the ...

Drug Distribution in the Human Eye

L. Murtomäki[1], T. Kainuvaara[1]
[1]University of Helsinki, Helsinki, Finland

Drug therapy of the posterior segment of an eye is very challenging due to the difficult accessibility. Modern drugs often are large molecules, such as peptides, antibodies or oligonucleotides which are administrated, e.g. by intravitreous injections which requires clinical conditions. Computer modeling can be helpful in designing new and less invasive routes of drug administration. COMSOL is ...

Heat, Air, and Moisture (HAM) Modeling of Historic Windows

H.L. Schellen[1]
[1]Eindhoven University Of Technology, Eindhoven, The Netherlands

Windows are the thermal weakest places in the external envelop of buildings. This is true for historic windows with original single pane glazing in historic buildings. To reduce the energy consumption and to improve thermal comfort of historic buildings, replacing these windows by modern double glazed windows affects the authentic character of these buildings too much. One way to improve the ...

Fluid Dynamics Analysis of Gas Stream in a Plasma Torch Reactor - new

C. Soares[1], N. Padoin[1], F. A. Cassini[1], M. Sanchez[2]
[1]Federal University of Santa Catarina, Florianópolis, SC, Brazil
[2]University of Oklahoma, Norman, OK, USA

Plasma technology has potential applications in a wide range of areas, such as microwave reflectors/absorbers, material processing, sterilization and chemical neutralization. The knowledge about the fluid behavior in such systems has a central role, since the stability of the flow in the region of the electrical arc is essential for the development of a well-behaved torch. In this work, a ...

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 ...

Numerical Simulation of Carbon Steel Corrosion Exposed to Flowing NaCl Solutions Through an Annular Duct - new

A. Soliz[1], K. Mayrhofer[1], L. Caceres[2]
[1]Department of Interface Chemistry & Surface Engineering, Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany
[2]Department of Chemical Engineering, University of Antofagasta, Antofagasta, Chile

A three-dimensional mathematical model under stationary conditions have been established to understand the corrosion of carbon steel cylindrical samples immersed in flowing NaCl solution through an annular duct. The migration, diffusion and convection mass transfer mechanisms were solved using the Nernst–Planck equation coupled to the Navier-Stokes equation. A corrosion model based on the mixed ...

Flow Simulation In A Submerged Membrane Bioreactor At Laboratory Scale

Y.M. Carreño-Martinez, J.M. Gozalvez-Zafrilla, J.A. Mendoza-Roca, and A. Santafé-Moros
Universidad Politecnica de Valencia, Spain

Submerged membrane bioreactor (SMBR) is an efficient technology for wastewater treatment that combines biological process and membrane filtration in one single stage. In the most usual configuration, submerged membrane hollow fibers are set in several planes. Air is introduced from the bottom in order to supply oxygen to the microorganisms but also to reduce fouling over the membrane fibers. ...