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.

Sulfur Deactivation Effects on Catalytic Steam Reforming of Methane Produced by Biomass Gasification

P. Sadooghi[1], R. Rauch[1]
[1]Vienna University of Technology, Vienna, Austria

Sulfur, which is incorporated in the biomass structure, is released into the product gas during gasification as hydrogen sulfide. Hydrogen sulfide is known to deactivate nickel based steam reforming catalysts by chemisorption on the metal surface during steam reforming process. Desulfurization has a negative effect on the process efficiency therefore steam reforming has to be run without ...

A Multiphase Porous Medium Transport Model with Distributed Sublimation Front to Simulate Vacuum Freeze Drying

A. Warning[1], J. M. R. Arquiza[1], A. K. Datta[1]
[1]Cornell University, Ithaca, NY, USA

A continuum, porous medium formulation with non-equilibrium sublimation was developed and validated for freeze drying without and with uniform microwave volumetric heating. The model incorporates the effect of Knudsen flow at low pressure and low permeability freeze drying. The distributed, non-equilibrium sublimation demonstrated that the sublimation front is a sharp boundary for high ice ...

Porous Media Based Model for Deep-Fat Vacuum Frying Potato Chips

A. Warning, A. K. Datta, A. Dhall, and D. Mitrea
Department of Biological and Environmental Engineering
Cornell University
Ithaca, NY

A multiphase porous media model involving heat and mass transfer within a potato chip was implemented in COMSOL 3.5a. The diffusive flux in oil and liquid water was modeled from capillary driven flow while the gas phase was modeled using binary diffusion. A non-equilibrium water evaporation rate was used and Darcy's law for the momentum equation to solve for the convection of each species. ...

Benchmark Model: Natural Convection of Water-Aluminum Oxide Nanofluids in a Square Cavity

M. Z. Saghir [1], A. Ahadi [1], A. A. Mohamad [2],
[1] Department of Mechanical Engineering, Ryerson University, Toronto, ON, Canada
[2] Department of Mechanical Engineering, University of Calgary, Calgary, AB, Canada

Nanofluids is a new class of fluid consisting of particles in a liquid. Different base liquid has been proposed and the most common one is water. The concentration of these particles can range from 0.1% to 5% or greater. Different numerical models have been proposed to solve this interesting problem. Some scheme assumed the fluid as a single fluid and other assumed as a two phase system ...

Study of Rotation of Ellipsoidal Particles in Combined Simple Shear Flow and Magnetic Fields

C. Wang [1], J. Zhang [1],
[1] Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO, USA

This study creates a 2D fluid-structure interaction (FSI) model to study the effect of magnetic field and particle aspect ratio on the period of rotation and symmetry of ellipsoidal paramagnetic particles. The results show that the magnetic field strength has a significant effect on the period and asymmetry of rotation of particle, and the direction of magnetic field modifies both the period and ...

Simulation of Manufacturing Process of Ceramic Matrix Composites

S. Yushanov, J. Crompton, and K. Koppenhoefer
ACES of Columbus, LLC, Columbus, OH, USA

Improved performance of aeroengines requires the development of new manufacturing technologies for ceramic matrix composites (CMCs). This has been simulated using COMSOL Multiphysics. Specialized simulation technologies have been developed to describe the infiltration of molten material into a ceramic perform. The physical phenomena considered in the analysis includes: unsaturated flow, ...

Simulation of the Coalescence and Subsequent Mixing of Inkjet Printed Droplets

M.H.A. van Dongen[1], H.J. van Halewijn[2]
[1]Fontys University of Applied Sciences, Expertise Centre Thin Films & Functional Materials, Eindhoven, The Netherlands
[2]Fontys University of Applied Sciences, Eindhoven, The Netherlands

Coalescence of droplets is a widely investigated phenomenon. In inkjet printing micrometer sized droplets are deposited on a substrate which when positioned close enough to each other will coalesce and mix. Little is known about the flows and mixing behaviour within these small droplets. In this investigation we follow the time evolved coalescence of two droplets with volume ratios ranging from ...

Modelling the Response of Microdialysis Probes in Glucose Concentration Measurement

J.M. Gozálvez-Zafrilla[1], A. Santafé-Moros[1], J.L. Díez-Ruano[2], J. Bondia[2]
[1]Institute for Industrial, Radiophysical and Environmental Safety (ISIRYM) - Universitat Politècnica de Valencia, Valencia, Spain
[2]Instituto Universitario de Automática e Informática Industrial (AI2) - Universitat Politècnica de Valencia, Valencia, Spain

Microdialysis is a technique of continuous glucose monitoring in diabetic patients. In microdialysis, a saline serum is perfused into a microdialysis probe. Glucose pass from the plasmatic fluid through the porous membrane. The glucose concentration in the dialysate obtained is measured by an external analytical device. This preliminary work aimed to obtain a model to relate glucose ...

Computational Evaluation of Improved Anaerobic Digestion Reactor Designs

A. A. Forbis-Stokes [1], M. A. Deshusses [1],
[1] Duke University, Durham, NC, USA

The purpose of this study was to investigate the impact on number of baffles placed in horizontal- or vertical-alignment of an anaerobic baffled reactor (HABR and ABR, respectively). Computational fluid dynamics was used to evaluate hydraulic performance of each and determine what number of compartments should be used to optimize reactor volume while adding minimal complexity. The findings ...

Heat and Moisture in Wooden Bearings of Monuments

H. L. Schellen [1], M. Spierenburg [2], A. W. M. van Schijndel [1],
[1] Eindhoven University of Technology, Eindhoven, The Netherlands
[2] 2DPA Cauberg-Huygen, Amsterdam, The Netherlands

Nowadays, thermal insulation is applied to most buildings. However, this proves to be a challenge for most monumental buildings. When insulation needs to be applied at the interior side of a building, thermal bridges are inevitable. Wooden beam ends beared in an external wall are an example of such a (hygro-)thermal bridge. Adding interior insulation introduces a risk at mould growth and can ...