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.

Multifunctional Fluid Power Components using Engineered Lattice Structures

S. Newbauer, D. Cook, and D. Pettis
Milwaukee School of Engineering
Milwaukee, WI

Designing a component with multiple functions, e.g. load bearing and noise attenuation, can increase the effectiveness of each component and reduce the complexity of the overall system, thereby improving system efficiency as well. Current multifunctional components include metal foam. It is posited that the cellular pores of the metal foam can be engineered and optimized for desired ...

Using COMSOL to Support a Cost-Effective, Non-Destructive Evaluation Approach for Predicting Bolt Failure in Highway Bridges

A. Elyea, B. Doubek, G. Hubbard, and D. Ozevin
Department of Civil Engineering
University of Illinois at Chicago
Chicago, IL

The development of a quantitative nondestructive evaluation method, as an alternative to visual inspection, for inspecting pre-tensioned bolts in fracture critical bridges is presented. In order to understand the ultrasonic behavior of a wide variety of bolt geometries used in bridges, numerical models of nine different bolt geometries were developed. The numerical models included the ...

Numerical and Experimental Analysis of Natural and Mixed Convection Heat Transfer for Vertically Arranged DIMM

G. Petrone, and G. Cammarata
University of Catania, Catania, Italy

 It is commonly recognized that careful thermal design of electronic equipments represents an unavoidable pre-production step in order to ensure reliability and performance of those components during their functioning. This paper mainly concerns a comparison between experimental and numerical results obtained in studying thermal dissipation in natural and mixed convection conditions for RAM ...

Influence of Vickers Indenter Tip Geometry on the Macro-indentation Properties of TiAl Alloys

G. Maizza, and R. Cagliero
Politecnico di Torino
Dipartimento di Scienza dei Materiali ed Ingegneria Chimica
Torino, Italy

In this work the influence of the geometry of the Vickers indenter tip on relevant indentation properties is investigated during instrumented indentation operated in the macro range (i.e. with forces ranging from 2 to 200 N) and carried out in the case of a homogenized (i.e. heat treated) TiAl alloy. The instrumented macro-indentation test is simulated by Comsol Multiphysics using a full 3D ...

Towards Rotordynamic Analysis with COMSOL Multiphysics

M. Karlsson[1]
[1]ÅF, Stockholm, Sweden

In this paper a pre-study on using COMSOL Multiphysics for rotordynamic analysis is presented. It is concluded that it is possible to use COMSOL Multiphysics to perform rotordynamical analysis. However, there are no standard environment for rotordynamics, hence the user has to extend the structural model with the rotordynamics effect such as gyroscopic effect and rotordynamical coefficients. By ...

Numerical Modeling and Performance Optimization Study of a Diaphragm Pump for Medical Application

I. Lupelli[1], P. Gaudio[1], A. Malizia[1], R. Quaranta[1]
[1]Department of Industrial Engineering, University of Rome “Tor Vergata”, Roma, Italy

In this contribution we present the results of the numerical modeling and performance optimization study of a diaphragm pump for drug infusion. The main objective is to develop a numerical model that replicates the pumping cycle (400ms) and also provides indications about the variation of pumping performance as consequence of the variation of the chamber-diaphragm system geometry, diaphragm ...

Energy Transformation Damping

G.S. Mulder[1]
[1]Leiden, The Netherlands

A model for material damping is presented in terms of internal friction and in terms of a variation of stiffness. In the latter case the idea is that the stiffness increases if elastic energy is stored and decreases if elastic energy is released. In case of a single mass spring system “stiffness” refers to the stiffness of the spring; in case of a continues object ...

Durability Analysis on Solar Energy Converters Containing Polymeric Materials

J. Wirth, S. Jack, M. Köhl, and K.-A. Weiß
Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

The key issues of the Fraunhofer Institute for Solar Energy Systems are research and development of solar technologies for the fast growing market of solar energy. This paper presents examples of the usage of COMSOL Multiphysics: The ingress of water is a serious reason for the degradation of photovoltaic modules which can hardly be measured using experimental approaches yet. Therefore, a ...

Numerical approach of film thickness and friction in EHL by F.E.M.

Demirci, I., Vergne, P.
Laboratoire de Mécanique des Contacts et des Solides LaMCoS, UMR CNRS-INSA de Lyon, Villeurbanne cedex

Hydrodynamic lubrication applies when two moving solids are separated by a lubricant film in which significant pressure occurs. Elastohydrodynamic lubrication (EHL) prevails if the pressure is high enough to elastically deform the solid surfaces. The hydrodynamic pressure is given by the Reynolds equation. This equation is derived from the Navier-Stockes relationships with the following ...

Modelisation of a hyperelastic polymer membrane deformation

Hoel, A., Jullien, M.C.
SATIE UMR 8029, ENS-Cachan, Campus de Ker-Lann, Bruz

We report numerical simulations in which a 30 µm thick polymer membrane, glued over a submilimetric polymer chamber, is subjected to a homogeneous pressure over its entire surface. The deflections are obtained as a function of the applied pressure, and are further compared to experimental measurements. Finally, the possible origin of the discrepancy between numerical and experimental results may ...

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