Technical Papers and Presentations

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.

Coupling Forced Convection in Air Gaps with Heat and Moisture Transfer inside Constructions

M. Bianchi Janetti[1], F. Ochs[1]
[1]University of Innsbruck, Innsbruck, Austria

Introduction: The simulation of coupled heat and moisture transfer in constructions is becoming even more important in the last years. COMSOL Multiphysics represents a powerful tool for this kind of simulations as shown in [1,2,3], although applications in this area are still rare. For the realistic prediction of the heat and moisture distribution in building elements exposed to external climatic ...

Transport of Vocs through Bioflim in Biotrickling Filters

Balasubramanian P[1]
[1]Indian Institute of Technology Madras, Chennai, Tamil Nadu, India

Realising the interlinkage of nature and engineering are of paramount essential while comprehending the basics of system’s performances. Application of biotechniques in air pollution control is one such emerging scientific area, where the understandings of these complex systems demand more utilisation of computing softwares. Recently, biofiltration is a versatile biological air pollution ...

Thermo-fluid Dynamics Modelling of Hydrogen Absorption and Desorption in a LaNi4.8Al0.2 Hydride Bed

D. Baldissin[1] and D. Lombardo[1]
[1]Compumat S.r.l., Torino, Italy

A two-dimensional mathematical model for the absorption and desorption of H2 in LaNi4.8Al0.2 was developed and experimentally validated. The model is composed of an energy balance, a mass balance and a momentum balance. These differential equations are numerically solved by means of the finite element method using the software COMSOL Multiphysics®. From a comparison between theoretical ...

Approaches for Fuel Cell Stack Modeling and Simulation with COMSOL Multiphysics

C. Siegel[1,2], G. Bandlamudi[1,2], P. Beckhaus[1], and A. Heinzel[1,2]
[1]Zentrum für BrennstoffzellenTechnik (ZBT), Duisburg, Germany
[2]University of Duisburg-Essen, Duisburg, Germany

This study highlights the possibility of using COMSOL Multiphysics for solving large scale PEM fuel cell stack models in the order of several million degrees of freedom (DOF). First, different gas flow channel configurations are solved in order to highlight the fluid flow and pressure behaviour. For these models, the full 3D Navier-Stokes equations are solved. It is seen that the amount of fluid ...

Simulated Suspended Solid Concentrations of Secondary Clarifiers in the Activated Sludge Process using the COMSOL Multiphysics Program

C. Gavrila1, and I. Gruia2
1Technical University of Civil Engineering, Bucharest, Romania
2University of Bucharest, Bucharest, Romania

An activated sludge system accomplishes an enhanced biological purification of wastewater, and is the most frequently used system to purify such.The purification of wastewaters are dynamical systems, operating under important and uncontrolled variations of concentration and composition of the polluting substances. Mathematical models are essential for describing, predicting, and controlling these ...

Pre-design of a Molten Salt Thorium Reactor Loop

J. P. Caire, and A. Roure
LEPMI-ENSEE, Saint Martin d'Hères, France

The generation 4 of molten salt reactors using the thorium cycle are characterized by a temperature close to 1000 oC. The very large heat transfers involved between the reactor core and the external parts with minimal thermal losses are a major issue. This study investigated a possible inner loop made of a series of conventional graphite filter plate exchangers, pipes and pumps, using the COMSOL ...

Study of Thermo-Electrical and Mechanical Coupling During Densification of a Polycrystalline Material Using COMSOL

F. Mechighel[1,2,3], B. Pateyron[1], M. El Ganaoui[1], and M. Kadja[3]
[1]CNRS SPCTS UMR 6638, Universite de Limoges, France
[2]Département de Génie Mécanique, Universite de Annaba, Algerie
[3]Département de Génie Mécanique, Universite de Constantine, Algerie

Spark Plasma Sintering (SPS) is a promising rapid consolidation technique that allows a better understanding and manipulation of sintering kinetics and therefore makes it possible to obtain polycrystalline materials (ceramic or metallic) with tailored microstructures. A numerical simulation of the electrical, thermal and mechanical coupling during SPS is performed. Equations for conservation for ...

COMSOL application in modeling PEMFC transients

X. Li
Chinese Academy of Sciences, Dalian Institute of Chemical Physics, Beijing, China

We studied the transient characteristics of PEMFC and water transport during PEMFC start-up, concerning the following aspects: Effect of air stoichiometry change on transient behavior of PEMFC, Transient behavior of water transport during PEMFC start-up, and high temperature PEMFC modeling.

Surface Aeration System Modeling using COMSOL

G. Selembo, P. Selembo, J. Stanton, and G. Paulsen
University of North Carolina
Charlotte, NC

Surface aeration systems are used in the wastewater treatment industry for the transfer of oxygen in the activated sludge process. These systems are capital intensive and also require a significant amount of energy to operate. Scale-up and design of these systems is largely empirical, and due to the size of these systems, modifications for experimental testing can be economically prohibitive. ...

Multiphase Transport with Large Deformations Undergoing Rubbery-Glassy Phase Transition: Applications to Drying

T. Gulati[1], A. Datta[1]
[1]Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA

Drying of biomaterials such as foodstuffs involves mass, momentum and energy transport along with large shrinkage of the porous material, which have significant effects on their final quality. Foodstuffs exhibit non-linearity when undergoing large deformations that affect the transport process in a critical way. Thus, it becomes important to perform a two-way coupling of the multiphase transport ...

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