E. Sparacino, D. Madeo, and C. Mocenni
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 ...
H. Cabrera, D. A. Zanin, L. G. De Pietro, A. Vindigni, U. Ramsperger, D. Pescia
Laboratory for Solid State Physics, ETH Zürich, Zürich, Switzerland
In our recent experiments we are revisiting the topografiner technology for the imaging of surface topography with a resolution of a few nanometers. In these new technique called Near-Field Emission Scanning Electron Microscopy (NFESEM), low-energy electrons are emitted from a polycrystalline tungsten tip via electric-field assisted tunneling. In order to characterize and improve the ...
University of Applied Sciences Bielefeld, Department of Engineering Sciences and Mathematics, Bielefeld, Germany
During a practical course the students compare the measured frequency response of an assembled PCB (Printed Circuit Board) with the simulated data out of COMSOL Multiphysics® software. For this the whole PCB with all components are feed in the simulator and afterwards an eigenfrequency-analysis is carried out. To simplify the effort to do this, a COMSOL® app was created. As result the user ...
X. Ma, M.B. de Rooij, and D.J. Schipper
Materials Innovation Institute, Enschede, The Netherlands
University of Twente, Enschede, The Netherlands
This paper describes the use of COMSOL Multiphysics® to determine the shear layer thickness in thin–section aluminum extrusion, based on the minimum work criterion. The studied two aluminum alloys are AA 6063 and AA 7020. The results show that a continuous shear layer featuring shear localization due to localized thermal softening is not possible to form under typical thin&ndash ...
Multi-Objective Optimization of a Strip-Fin Microchannel Heatsink: Integrating COMSOL Multiphysics with modeFRONTIER
A. Clarich, R. Russo, and N. Fateh
Esteco North America, Miami, FL, USA
For this work the multi-objective design environment modeFRONTIER was integrated with COMSOL, bringing the advantages of multi-objective optimization to multiphysics simulations. Practically any commercial analysis tool (such as COMSOL) or in-house code can be integrated within modeFRONTIER’s framework. In the case of the direct approach, modeFRONTIER determines the configurations to be ...
Design Optimization of an Electronic Component with an Evolutionary Algorithm Using a MATLAB-COMSOL Based Model
E. Pelster, and D. Wenger
Wenger Engineering GmbH
Electric construction components exposed to alternating high voltage have to withstand a significant amount of thermal loads and, resulting from the changes in Temperature , structural stresses. In order to achieve minimization of these loads, optimizing the geometry can be a helpful tool in the design process. In this study COMSOL is used to predict thermal and mechanical loads on a high ...
COMSOL Multiphysics Models for Teaching Chemical Engineering Fundamentals: Absorption Column Models and Illustration of the Two-Film Theory of Mass Transfer
Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, MA, USA
COMSOL® models have been developed for teaching gas absorption fundamentals. Model results are compared to environmentally significant experimental results for removing CO2 and SO2 from air using water as solvent. For concentrated gas mixtures, the models are shown to be equivalent to but easier to use than the traditional graphical integration method and to a solution method developed with ...
Solving Distributed Optimal Control Problems for the Unsteady Burgers Equation in COMSOL Multiphysics®
F. Yilmaz and B. Karasözen
Department of Mathematics, Gazi University, Ankara, Turkey
Department of Mathematics and Institute of Applied Mathematics, Middle East Technical University, Ankara, Turkey
We use COMSOL Multiphysics® for solving distributed optimal control of un- steady Burgers equation without constraints and with pointwise control constraints. Using the first order optimality conditions, we apply projection and semi-smooth Newton methods for solving the optimality system. We have applied the standard approach by integrating the state equation forward in time and the ad- joint ...
M. Dickinson, N. Renevier, W. Ahmed
Racing to Research team, School of Computing, Engineering and Physical Sciences, University of Central Lancashire, Preston, United Kingdom
The Jost Institute, School of Computing, Engineering and Physical Sciences, University of Central Lancashire, Preston, United Kingdom
Institute of Nanotechnology and Bioengineering, School of Computing, Engineering and Physical Sciences, University of Central Lancashire, Preston, United Kingdom
Use of COMSOL Multiphysics: In operation, the piston ring is surrounded by gas acting on it, using effect of chamfer design has been considered using Love’s equation in conjunction with Stone’s equation for force ad Miler’s equation for gas pressure modelling. The chamfer geometry was controlled through variable inputs such as coating thickness, ring thickness, distance from the ring angle ring ...
3D COMSOL Multiphysics® Model of a Plate Heat Exchanger to Support a Laboratory Teaching Environment - new
N. Medeiros, W. Clark
Worcester Polytechnic Institute, Worcester, MA, USA
Chemical engineering students and practitioners need an understanding of fluid flow and heat transfer inside heat exchangers. Because the flow within plate heat exchangers is difficult to visualize, we developed COMSOL Multiphysics® simulations of plate heat exchangers for students to study alongside a physical heat exchanger in a laboratory setting. Simulative experiments allow students to ...