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.

Modeling of High-Temperature Ceramic Membranes for Oxygen Separation

J.M. Gozálvez-Zafrilla[1], J.M. Serra[2], and A. Santafé-Moros[1]

[1]Chemical and Nuclear Engineering Depart., Universidad Politécnica de Valencia, Valencia, Spain
[2]Instituto de Tecnología Química, Valencia, Spain

Oxygen transfer through ceramic membranes at high-temperature can substantially reduce costs respect to conventional separation methods. With the aim to improve the determination of the properties of the ceramic materials, a lab-scale permeation set-up was modeled using the Chemical Engineering Module of COMSOL Multiphysics®. The solution required the coupling of three domains. Gas flow was ...

Numerical Simulations of the Navier-Stokes Problem with Hyper Dissipation

Manouzi, H.
Departement of Mathematics and Statistic, Université Laval University, Quebec, Canada

This paper proposes a numerical simulation of the incompressible viscous flows with hyper dissipation using FEMLAB. We propose two variational formulations to solve this problem: the primal and the mixed formulations. For the first one, a biharmonic formulation for the velocity and the pressure is used. The second one uses a mixed formulation where the laplacian of the velocity, the velocity ...

Microscale Modelling of the Frequency Dependent Resistivity of  Porous Media

J. Volkmann, O. Mohnke, N. Klitzsch, and R. Blaschek
E.ON Energy Research Center, RWTH-Aachen, Aachen, Germany

The frequency dependent electrical impedance of porous media is studied by modelling the charge transport in the electrolyte filled pore space using COMSOL Multiphysics.  The corresponding experimental method, called Spectral Induced Polarization (or Impedance Spectroscopy), shows a frequency dependent phase shift between a measured electric current and an applied alternating voltage. It is ...

Numerical Modelling of Vortex Induced Vibrations  in Submarine Pipelines

F. Van den Abeele, J. Vande Voorde, and P. Goes
ArcelorMittal Research & Development Industry Gent, Zelzate, Belgium

Vortex-induced vibration is a major cause of fatigue failure in submarine oil and gas pipelines and steel catenary risers. Even moderate currents can induce vortex shedding. In this paper, COMSOL Multiphysics is applied to study the flow pattern around submarine pipeline spans, and predict the amplitude and frequency of the vortex induced vibrations. The sensitivity of the computational fluid ...

Inverse Estimation of the Flow Resistivity Tensor of Open-Cell Foams from Experimental Data and Darcy’s Flow Simulations

C. Van der Kelen, P. Göransson, and N-E.Hörlin
Marcus Wallenberg Laboratory for sound and vibration research, KTH Aeronautical and Vehicle Engineering, Stockholm, Sweden

The flow resistivity tensor, which is the inverse of the viscous permeability tensor, is one of the most important material properties for the acoustic performance of open cell foams, used in acoustic treatments. Due to the manufacturing processes, these foams are most often geometrically anisotropic. This paper discusses the estimation of the flow resistivity tensor using an improvement of a ...

Transient Simulation of a Naturally Ventilated Façade in a Mediterranean Climate

C. Balocco[1]
[1]Dipartimento di Energetica “Sergio Stecco”, Università degli Studi di Firenze, Firenze, Italy

Energy performances and building energy quality can be achieved by high performance envelopes. In this paper the thermal performance of a naturally ventilated façade, applied to a traditional wall, widely used in existing buildings, was investigated by a transient simulation. A three dimensional model of the façade was investigated in Florence and Treviso (Italy). The simulation ...

Modeling Instabilities in Volatile Liquid Films Flowing over Locally-Heated Substrates using COMSOL

N. Tiwari, and J. M. Davis
Department of Chemical Engineering, University of Massachusetts, Amherst, MA, USA

The dynamics and stability of a liquid film flowing under the influence of gravity over a planar surface with a rectangular heater are modeled using COMSOL. The temperature variation at the liquid-air interface near the heater induces a gradient in surface tension, or Marangoni stress, that distorts the film shape and gives rise to a pronounced ridge.The shape of the flowing film near the heater ...

Transport Phenomena of Bubbles in a High Viscous Fluid

F. Pigeonneau
CNRS/Saint-Gobain, France

Dr. Franck Pigeonneau is currently working in the joint laboratory between the Centre National de la Recherche Scientifique (CNRS) and the company Saint-Gobain. He received his Ph. D. in 1998 from the University Pierre et Marie Curie (Paris, France). His main research activities are devoted to the transport phenomena in high viscous fluids relevant for glass melting processes. He is using COMSOL ...

Predicting the Retention Time of Nuclear Reaction Products in the PSI Recoil Chamber Using COMSOL Multiphysics

R. Dressler[1], R. Eichler[1]
[1]Paul Scherrer Institute, Villigen, Switzerland

Introduction: The chemical properties of the heaviest elements (atomic number Z > 103) depend on the influence of the high nuclear charge to their electronic structure. Enhanced chemical stability of copernicium (Cn, Z = 112) and flerovium (Fl, Z = 114) was predicted already 40 year ago by Pitzer [1]. The challenge of chemical investigations of these elements is the tiny production rates of few ...

Towards a Model for Simulating Driving Rain on an Inclined Roof during Wind Gusts and Heavy Rain Intensity

A.W.M. van Schijndel[1]
[1]Eindhoven University of Technology, Eindhoven, The Netherlands

The roof of a well known shopping place in Amsterdam collapsed during a storm with heavy rain showers in 2002. One of the main problems was the malfunction of the draining system. Another problem was that driving rain water apparently washed over edges that where designed to hold the water. This short paper presents the progress of using COMSOL to simulate the height of the water near the edges ...

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