e2v Ltd., Essex, United Kingdom
There is a requirement for an RF (Radiofrequency) industrial dryer that will be capable of dehydrating foodstuff to the correct level after the product has been fried. RF drying should actively target moisture, due to waters high dielectric properties. An industrial dryer can be optimized using modeling to obtain the correct moisture removal rates in the RF drying process. Measurement of the ...
A.W.M. van Schijndel and H.L. Schellen
Eindhoven University of Technology, Eindhoven, The Netherlands
This paper presents the use of the multiphysics package COMSOL for teaching heat and moisture transport modeling in the research area of building physics. It includes a description on how COMSOL works and six exercises with 2D, 3D, steady state and transient models. It is concluded that COMSOL is a very useful tool for this kind of engineering education. Especially, the abstraction level of ...
M. Cavenago, P. Veltri, E. Gazza, G. Serianni, and P. Agostinetti
INFN-LNL, Legnaro, Padova, Italy
Consorzio RFX, Padova, Italy
The development of powerful negative ion sources requires precise and versatile simulation tools to predict the emittance of the extracted ion beams and the heat load on the electrodes. A first tool is a determination of the plasma beam interface which is accomplished by a set of macro based in the COMSOL Multiphysics environment. Notwithstanding the strong nonlinearities involved, a proper ...
G. Hulkó, C. Belavý, P. Bucek, K. Ondrejkovic, and P. Zajícek
Institute of Automation, Measurement and Applied Informatics of Slovak University of Technology, Bratislava, Slovak Republic
In systems and control theory dynamical systems described by partial differential equations are known as distributed parameter systems. So for modeling and dynamical analysis of distributed parameter systems wide possibilities are offered by COMSOL Multiphysics® based on numerical solution of sets of partial differential equations by finite element method. Paper presents actual possibilities ...
S. Lefeuvre, and O. Gomonova
Eurl Creawave, Toulouse, France
Siberian State Aerospace University, Krasnoyarsk, Russia
The microwave heating and processing of heterogeneous material is usually simulated using a set of coupled PDE equations in an homogeneous medium. Nowadays it is possible to describe more accurately the process with a suitable description of the heterogeneities that is at the grain level. Many authors work with spheres (circles) to represent the grains but it is difficult to achieve an ...
A Study of Distributed Feed-Back Fiber Laser Sensor for Aeronautical Applications Using COMSOL Multiphysics
I. Lancranjan, C. Gavrila, S. Miclos, and D. Savastru
Advanced Study Centre - National Institute for Aerospace Research Elie Carafoli, Bucharest, Romania
Technical University of Civil Engineering Bucharest, Romania
National Institute R&D of Optoelectronics, INOE 2000, Bucharest, Romania
Distributed Feedback Fiber Laser (DFB-FL) sensors are increasingly used in aeronautical applications. One of the newest such applications consists in detecting the “transition” zone between laminar and turbulent air flow upon the extrados surface of an aircraft wing. In this specific application DFB-FL are operated as air pressure sensors monitoring amplitude variations of ~1 Pa (laminar flow) ...
S. Mitra, R. Naik, and A. Narain
Michigan Technological University, Houghton, MI, USA
The paper outlines a two-dimensional computational methodology and presents results for laminar/laminar condensing flows inside mm- scale ducts. The methodology has been developed using MATLAB/COMSOL platform and is currently capable of simulating film-wise condensation for steady and unsteady flows. The results obtained are shown to be in agreement with an independently developed quasi-one ...
D-S. Jeng, X. Luo, and J. Zhang
Division of Civil Engineering, University of Dundee, Dundee, Scotland, UK
Offshore wind and wave energy industries have developed considerably in the last two decades. Most offshore energy structures used in the existing projects are mono-piles in shallow water due to simplicity of installations, design and control. Numerous research for the design and modeling of offshore wind energy system have been carried out in the past. However, most previous studies have been ...
O. Meneghini, S. Shiraiwa, and C. Lau
Massachusetts Institute of Technology
High power Lower-Hybrid RF waves injected at in a Tokamak plasma can strongly modify the edge plasma. This is caused by ponderomotive forces pushing charged particles in an inhomogeneous oscillating electromagnetic field towards weaker field areas. On the Alcator C-Mod Tokamak, edge density profile measurements by means of an X-mode SOL reflectometer were able for the first time to accurately ...
G. H. Miley, M. P. Reilly, B. Ulmen, P. Keutelian, and J. Orcutt
NPL Associates, Inc., Urbana-Champaign, IL
Starfire Industries, Champaign, IL
University of Illinois, Urbana-Champaign, IL
A coupled helicon/IEC plasma jet is in development for space propulsion applications. This device decouples the ionization and plasma acceleration process into separate stages. A realistic model is to consider a plasma media where the relative permittivity is negative or imaginary. Toward this end, COMSOL readily considers complex permittivity values, enabling a first attempt at modeling a ...