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.

Turbulent Bounded Flows for Oil & Gas Industry with COMSOL CFD Module

A. Fadel[1], G. Fontana[1]
[1]Isoil Impianti, Albano S. Alessandro, Italy

Industrial applications of fluid mechanics can require to satisfy necessities as diverse as legal norms, optimization requirements and manufacturing constraints. Therefore a Computational Fluid Mechanics software often becomes a must in the development of new devices or the improvement of older ones. Besides the legalistic aspect (such as the European Pressure Equipment Directive), several steps ...

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 ...

Helium Two-Phase Flow in a Thermosiphon Open Loop

Bertrand Baudouy
Head of the Cryogenics R&D Group, CEA Saclay, France

Outline of presentation: Missions of SACM (Accelerator, Cryogenics and Magnetism Division) Context : The Large Hadron collider at CERN, Geneva Cooling large superconducting magnet Thermosiphon open loops for cooling superconducting magnets Experimental facility and ranges of the study COMSOL Multiphysics Modeling Results with COMSOL Multiphysics Comparison with experimental ...

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 ...

Modelling and Simulation of Moving Boundaries and Convective Heat Transfer in non-Autogenous Fusion Weld Pools using FEMLAB 3.1

Edstorp, M., Eriksson, K.
University of Trollhättan/Uddevalla, Dep. of Technology, Mathematics & Computer Science, Trollhättan

This article is concerned with the mathematical modelling and simulation of the thermo and fluid dynamics of the molten pool created during an arc fusion welding process with consumable electrodes. Weld pool simulation is a true multiphysics problem in that a model for a typical process such as GMAWis required to incorporate the effects on the transfer of heat and mass that are induced by ...

FEMLAB Solution of the Creeping Flow Equations for a Particle in Stagnation Point Flows in the Vicinity of a Wall

Pasol, L., Feuillebois, F.
Paris

The fluid velocity and pressure of the floweld around axed spherical particle embedded in an unperturbed axisymmetric creeping flow in the vicinity of a wall is calculated analytically by the method of bipolar coordinates. Results are obtained with a 10-16 precision allowing a comparison with the results from a FEMLAB calculation. Results from the analytical calculation exhibit several cell ...

Mathematical Frame-work for the Productivity Index of Wells with Fast Forchheimer (non-Darcy) Flow in Porous Media

E. Aulisa [1], A. Ibragimov[1], P. Valko [2], and J. Walton[3]
[1] Texas Tech University, Department of Mathematics and Statistics
[2] Texas A & M University, Department of Petroleum Engineering
[3] Texas A & M University, Department of Mathematics

In the current paper, similar features for fast or turbulent, non-linear flows subjected to Forchheimer equations are analyzed. Under some hydrodynamic and thermodynamic constrains, it has been shown that there exists the so called pseudo-steady state regime for Forchheimer flows in reservoir media. This invariant is called diffusive capacitance, which is the mathematical model for the well ...

Modeling Flow Through Foam Channels

F. Rouyer, E. Lorenceau, and O. Pitois
Laboratoire de Physique des Matériaux Divisés et des Interfaces, Université Paris-est, Paris, France

We model the liquid transport in foam (i.e. drainage) by unidirectional flow transverse to a triangular planar area that represents channel (i.e. Plateau borders) cross-sections. Partial mobility of the interfaces is obtained balancing the bulk viscous stress with the surface viscous stress and a velocity equal to zero is imposed at the vertices. In liquid foams, the wedges of the channels are ...

Stability Analysis of a Boiling Loop in Space

W. R. Schlichting1, R. T. Lahey Jr.1, M. Z. Podowski1, and T. A. Ortega G?mez2
1Center for Mutliphase Research, Rensselaer Polytechnic Institute, Troy, NY, USA
2Institute for Nuclear & Energy Technologies, Karlsruhe Institute of Technology, Karlsruhe, Germany

Boiling systems must be analyzed to determine their stability characteristics. Multiphase system instabilities can be predicted by the use of a one-dimensional drift-flux model. Using this model, an analysis has been performed with the COMSOL code to investigate both linear and nonlinear instability phenomena. In particular, density-wave oscillations in boiling channels were investigated, and, ...

Dynamic Multi-Phase Modelling and Optimisation of Fluid Jet Polishing Process

A. Beaucamp[2], R. Freeman[2], and Y. Namba[1]
[1]Chubu University, Kasugai, Japan
[2]Zeeko Ltd, Coalville, UK

In the Fluid Jet Method, a polishing fluid is compressed and delivered through a nozzle, allowing the spot area to become continuously replenished with abrasives and coolant. Process parameters include: Abrasive type and concentration, Inlet pressure, Nozzle diameter, Impingement angle, Surface feed of spot. The simulation uses COMSOL’s turbulent 2-phase flow model, with the incompressible ...

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