A. J. Bosma, and B. A. Reitsma
Tauw bv, Deventer, The Netherlands
The hydraulic design of wastewater treatment plants (WWTP) is usually based on general guidelines and experience. Research and development in this field is mainly focused on understanding and improvement of the biological processes. In this article we present modeling of the activated sludge tanks of the wastewater treatment plants in Amsterdam-West and Eindhoven. For both locations, a number of ...
Modeling of Natural and Combined Natural-Marangoni Convection Flows in a Low Prandtl Number Material Filled in a Square Mold by using COMSOL
F. Mechighel1,2,3, M. El Ganaoui2, B. Pateyron2 and M. Kadja3
1Mechanical Engineering Department, Annaba University, Annaba, Algeria
2SPCTS Laboratory, Limoges University, Limoges, France
3Mechanical Engineering Department, Constantine University, Constantine, Algeria
In the present paper a problem with both natural and combined natural-Marangoni convection flow of materials (having small Prandtl numbers of 0.0128, 0.054 and 0.71, respectively) filled in an enclosure has been investigated by a numerical simulation using COMSOL. Solutions have been obtained for different values of the Rayleigh number. The generated flow under buoyancy and surface tension forces ...
Energy Engineering Department, Università degli Studi di Firenze, Firenze, Italy
The natural ventilation of buildings provides improvement of internal comfort and air quality conditions leading to a significant reduction of the consumption of cooling energy. In the present paper the air flow patterns, velocity and air temperature distributions inside a historical building in Palermo (Italy), at present used as a library, were investigated by a 3D transient simulation using ...
Design of Three Phase Homopolar Synchrone Reluctance Machine with Double Statoric Winding and Double Massive Rotor
C. Belalahy, I. Rasoanarivo, S. Rael, and F. M. Sargos
GREEN Institut National Polytechnique de Lorraine, Vandoeuvre lès Nancy, France
This paper deals with the design of a three phase synchronous reluctance machine constituted by two stators and two massive rotors. A coil is placed in the stator, between the two salient poles of the rotor. These poles can have parallel or perpendicular axes. Such structures allow the rotor to work as an inertial load and provide high dynamic performances with regards to energy conversion, a ...
Coupled Electromagnetic, Thermal and Fluid Dynamics Simulation of Axial Flux PM Synchronous Machines
DAEIMI, Department of Automation, University of Cassino, Cassino, Italy
This paper investigates the Electromagnetic and thermal behavior of Synchronous Axial Flux Permanent Magnet Machines. The Axial Flux machine employed for tests and simulations has a Soft Magnetic Compound stator core. The electromagnetic analysis is used to assess electromechanical variables and machine parameters. Furthermore, the thermal source is obtained from a DC current flow model which is ...
A. D. Haydock, J. Melrose, P. Rayment, M. F. Butler, and G. Lian
Unilever R&D Colworth, Colworth House, Sharnbrook Bedford, UK
In this presentation, we describe the use of COMSOL for modeling release of active molecules from hydrogels as a model system of structured foods. We first discuss the structural changes of hydrogel in the gastro-intestinal (GI) tract environment and how this is modelled mathematically. We then discuss how to implement the mathematical equations in COMSOL. Computer simulations have been performed ...
R. Said1, R. B. Schüller2, P. Young3, A. Aastveit2, and B. Egelandsdal2
1Simpleware Ltd, Exeter, UK
2Norwegian University of Life Sciences, Ås, Norway
3University of Exeter, SECAM, Exeter, UK
Simulation of salt diffusion in a pork (bacon) side is a relatively complex task since such a piece often consists of different regions of skin, meat, fat and bone; each with diffusion coefficients that vary by orders of magnitude. Adding to this complexity is the arbitrary shape and topology of each region; separately and combined.This paper will present a comprehensive solution for constructing ...
I. Tomashchuk, J.-M. Jouvard, and P. Sallamand
Institut Carnot de Bourgogne, Université de Bourgogne, Bourgogne, France
Our research is dedicated to the joining of stainless steel AISI 316 L with copper by high-powered laser Nd:YAG welding. During the course of our work, we developed a numerical model of the laser welding process which relies on correspondence with experimental data.
Computational Analysis of Transport Phenomena and Electrochemical Reactions in a Polymer-Electrolyte-Membrane Fuel Cell
P. Mina, J. Pauchet, and P. Schott
LITEN/DTH/LCPEM , CEA-Grenoble, Grenoble, France
A two-dimensional transient model for the membrane electrode assembly of a Polymer-Electrolyte-Membrane Fuel Cell is presented. Species and energy transport, electrical current distribution, and electrochemical kinetics are described in the computational domain, which consists of the electrolyte membrane as well as a gas diffusion layer, a micro-porous layer and a catalyst layer for both the ...
T. Machado Amorim, and C. Allély
ArcelorMittal Research and Development, Automotive Products Center, Maizières les Metz, France
Underpaint corrosion is one of the most important degradation modes for galvanized steel sheets employed in automotive and building industry. Simplified systems (metal coated with thin polymer layer) under corrosion situations have been studied in the past few years and it is now widely accepted that one of the mechanisms responsible for the paint disbonding is cathodic delamination. In this ...