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.

Hydrogen Vehicle Leak Modelling in Indoor Ventilated Environments

A. Hallgarth[1], A. Zayer[1], A. Gatward[2], and J. Davies[2]
[1]Hazard Research & Risk Consultants Ltd, Aberystwyth, Wales, United Kingdom
[2]Independent Consultants, United Kingdom

This paper presents and discusses HazRes’ research and results associated with the simulation and modelling of hydrogen release and dispersion events in indoor enclosed environments, using COMSOL Multiphysics. HazRes has developed a gas dispersion model in COMSOL, which takes into account the effects of buoyancy, localized ventilation effects and turbulence generated by obstacles on the ...

Estimation of Boundary Properties Using Stochastic Differential Equations and COMSOL

A. Atalla[1], and A. Jeremic[1]
[1]McMaster University, Hamilton, Ontario, Canada

The inverse diffusion problems deal with the estimation of many crucial parameters such as the diffusion coefficient, source properties, and boundary conditions. Such algorithms are widely applied in many design problems in different physical, chemical, and biological fields. Recently, the estimation of the boundary properties, of the diffusion process, have attracted researchers. We first ...

Boundary Conditions Identification for Thermostatic Cauchy Problem by Minimizing an Energy-like Function

T.N. Baranger
LDMS, UMR CNRS-INSA 5006, ISTIL - Université Claude Bernard, Lyon

An energy-like error function is introduced in the context of the ill-posed problem of boundary data recovering, which is commopnly known as a Cauchy problem. Here the problem is converted into an optimization problem. Numerical simulations highlight the efficiency and robustness of the proposed method.

Simulation of Transport of Lipophilic Compounds in Complex Cell Geometry

Q.A. Chaudhry[1], M. Hanke[1], and R. Morgenstern[2]
[1]School of Computer Science and Communication, Royal Institute of Technology, Stockholm, Sweden
[2]Karolinska Institutet, Stockholm, Sweden

The mathematical modeling of the diffusion and reaction of toxic compounds in mammalian cells is tough task due to their very complex geometry. The heterogeneity of the cell, particularly the cytoplasm, and the variation of the cellular architecture, greatly affects the behavior of these toxic compounds. Homogenization techniques have been implemented for the numerical treatment of the model. ...

Stresses in Carotid Plaques Using MRI-based Fluid Structure Interaction Models

S.A. Kock [1], E. Fründ [1], W.Y. Kim [1], and J.V. Nygaard [2]
[1] Aarhus University Hospital, Denmark,
[2] Aarhus University, Denmark

Using magnetic resonance images, a model was created of an atherosclerotic plaque in a patient. A fluid-structure interaction analysis was then carried out in order to determine principal stresses in the protective fibrous cap. Results indicate stresses at high blood pressure in excess of 300 kPa, the established cap rupture strength. The technique could prove to be of great value to ...

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 ...

Deep Desulfurization of Diesel Using a Single-Phase Micro-Reactor

G. Jovonavic[1], J. Jones[1], and A. Yokochi[1]
[1]School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon, USA

This paper describes the benefits of computational fluid dynamics in the development of a microreactor used in the desulfurization of aromatic compounds. It is crucial to verify diffusion and extinction coefficients to ensure accurate simulation results prior to experiments. COMSOL Multiphysics was used to model the behavior of all of the possible species present and reactions that may occur.

Deformable Medical Image Registration using the Finite Element Method

J. Li, and T.C. Zhu
Department of Radiation Oncology, University of Pennsylvania

Deformable medical image registration is studied with two models developed using COMSOL Multiphysics. One is based on the plane strain application mode and the other on the moving mesh (ALE) application mode. The models are examined by registering gross target volumes of a head-neck tumor with two sets of CT images. The comparison shows that the registration using the moving mesh (ALE) ...

Taking COMSOL Multiphysics Beyond Traditional Finite Elements

John Dunec
COMSOL Inc.
Palo Alto, USA

This talk will give you some tips and tricks for using techniques in COMSOL Multiphysics that you might not have known about. --------------------------------- Keynote speaker's biography: John Dunec received his Ph.D. from Stanford, specializing in numerical simulation of thermal-fluid systems. He has over two decades of experience in the field: first as a product engineer and manager at ...

Thermo-fluid-dynamic evaluation of a microsystem to analyse radioactive solutions

G. Janssens-Maenhout
Joint Research Centre Ispra
Ispra, Italy

It has become common place to use micro-electromechanical systems (MEMS) to evaluate the chemical properties of solutions. However, such microchips have not yet been applied to the analysis of radioactive solutions, for the purpose of nuclear safeguards, in the nuclear reprocessing industry. Implementing MEMS in this area results in a reduced volume of the sample to be analysed. This has many ...

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