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.

Linear LS Parameter Estimation of Nonlinear Distribute Finite Element Models

E. Sparacino[1], D. Madeo[1], and C. Mocenni[1]

[1]Dipartimento di Ingegneria dell’Informazione, Università di Siena, Siena, Italy

This work concerns the development of a new direct parameter identification procedure for a class of nonlinear reaction- diffusion equations. We assume to know the model equations with the exception of a set of constant parameters, such as diffusivity or reaction term parameters. Using the Finite Element Method we are able to transform the original partial differential equation into a set of ...

Helical Coil Flow: A Case Study

M. Cozzini[1]

[1]Renewable Energies and Environmental Technologies Research Unit, Fondazione Bruno Kessler, Povo, TN, Italy

Stationary flow configurations in curved pipes constitute an important subject from both the theoretical and the practical point of view. A typical application concerns the calculation of secondary flow effects on the thermal efficiency of heat exchangers. Motivated by a similar problem, this paper investigates the flow patterns in a helical duct of non trivial cross section. The considered ...

Multibody Contact Analysis of an Rzeppa CV-Joint

L. Armellin[1], F. Gatelli[1], and G. Tanghetti[1]

[1]R&D Department, Metelli S.p.A., Cologne, BS, Italy

Ball joints are widely used in many applications. This paper describes the contact and kinematic analysis of an Rzeppa type constant-velocity joint (CV-joint). Starting from a conveniently simplified 3D model, at fixed joint angle of 45°, a CV-joint made of all “generic steel” components has been studied. Considering only a “perfect” geometry (i.e. not affected by ...

Model of Heat and Mass Transfer with Moving Boundary During Roasting of Meat in Convection-Oven

A.H. Feyissa[1], J. Adler-Nissen[1], and K.V. Gernaey[2]
[1]Food Production Engineering, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
[2]Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

A 2D mathematical model of coupled heat and mass transfer describing oven roasting of meat was formulated from first principles. The current formulation of model equations incorporates the effect of shrinkage phenomena and water holding capacity. The model equations are based on conservation of mass and energy. The pressure driven transport of water in meat is expressed using Darcy’s equation. ...

An Acoustical Finite Element Model of Perforated Elements

P. Bonfiglio[1][2] and F. Pompoli[1][2]
[1]Materiacustica S.r.l., Ferrara, Italy
[2]Engineering Department, University of Ferrara, Ferrara, Italy

The present work deals with a numerical investigation of resonating systems used for noise control applications. In literature one can find analytical models based on fluiddynamics concepts for evaluating losses occurring across the holes of the perforates. In the paper an acoustical formulation based on the equivalent dissipative fluid approach will be analyzed. It will be firstly applied to ...

Static and Dynamic Simulation of an Electromagnetic Valve Actuator Using COMSOL Multiphysics®

R. Wislati[1] and H. Haase[1]
[1]Institut für Grundlagen der Elektrotechnik und Messtechnik, Leibniz Universität Hannover, Hannover, Germany

In this paper an Electromagnetic Solenoid Actuator (EMVA) consisting of an upper and lower electromagnet, a linear moving armature and two preloaded springs is considered as a potential approach in Variable Valve Actuation (VVA) systems for internal combustion engines. The analysis of the upper electromagnet has been performed using Finite Element Method (FEM) simulation. Thereby an axially ...

3-D COMSOL Analysis of Extruder Dies

E. Solomon[1] and V. Mathew[1]
[1]Arcada University of Applied Sciences, Espoo, Finland

Three-dimensional flow analysis was performed by using COMSOL Multiphysics Chemical Engineering Module for the purpose of analyzing the flow properties and finding out the operating points of a test domain. Using material property table for an exemplary melt of LDPE (Low-Density Polyethylene), the logarithmic viscosity-shear rate graph was plotted and fitted to the 4–constant modified Carreau ...

Fast 2D Simulation of Superconductors: A Multiscale Approach

V.M. Rodriguez-Zermeno[1], M.P. Sørensen[1], N.F. Pedersen[2], N. Mijatovic[2], and A.B. Abrahamsen[3]
[1]DTU Mathematics, Lyngby, Denmark
[2]DTU Electrical Engineering, Lyngby, Denmark
[3]Materials Research Division, Risø, DTU, Roskilde, Denmark

This work presents a method to calculate AC losses in thin conductors such as the commercially available second generation superconducting wires through a multiscale meshing technique. The main idea is to use large aspect ratio elements to accurately simulate thin material layers. For a single thin superconductor, several standard test cases are simulated including transport current, externally ...

Large Scale Outdoor Flammable & Toxic Gas Dispersion Modelling in Industrial 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

HazRes has developed a gas discharge and dispersion model in COMSOL which takes into account the effects of localized wind profiles and turbulence generated by buildings, structures and terrain on the dispersion of gases in question. The main focus of this work is to develop and provide clients with more accurate prediction methods relative to industrial standard software tools in modeling ...

Mathematical Model of Blood Flow in Carotid Bifurcation

E. Muraca[1], V. Gramigna[1], and G. Fragomeni[1]
[1]Department of Experimental Medicine and Clinic, Magna Graecia University of Catanzaro, Catanzaro, Italy

The goal of this research is to provide the medical staff with a numerical system assessment of wall shear stress in carotid bifurcation. Through this model, it will be fundamental to investigate the stress state properties of the surface in contact between the plaque and the artery, and study the geometric relationship between the bifurcation angle and fluid structural properties. The formation ...