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 ...
J. Hofman1,2,3, L. Shao2, B. Wols2, W. Uijttewaal2, G. I. J. Pelaar1, E. Beerendonk1, and H. van Dijk2
1Kiwa Water Research, Rijkswijk, The Netherlands
2Delft University of Technology, Delft, The Netherlands
3Waternet, Amsterdam, The Netherlands
UV technology is an emerging technology for drinking-water treatment. It can either be used as a disinfection barrier, where the UV light is used to inactivate pathogenic microorganisms, or in combination with hydrogen peroxide as an advanced oxidation process. The design of UV reactors is very complex. The water flow and related aspects of mixing, the UV light distribution, and the reaction ...
A. Bradji1, and E. Holzbecher2
1Charles University, Prague, Czech Republic
2Weierstrass Institute for Applied Analysis and Stochastics WIAS, Berlin, Germany
The convergence of numerical solutions is mainly determined by the convergence order, which quantifies the improvement of the solution when the mesh is refined. In this paper we examine various differential equations and the convergence behavior of their COMSOL Finite Element solutions. The numerically observed convergence rates are compared with theoretical results, as far as these are ...
M. S. Virk, A. E. Holdø, and S. Kaennakham
Energy & Environmental Technology Applied Research Group, Faculty of Engineering and Computing, Coventry University, Coventry, UK
Microfluidic systems hold promise for many novel applications where rapid mixing is important, and has lead to a number of new developments. Despite such major developments, no systematic study has been carried out to understand the effect of flow mechanisms and geometry on microfluidic mixing. This work focuses on a mixing analysis of low Reynolds number (< 25) microfluids in a T-shaped passive ...
N. Bianco1, O. Manca2, and D. Ricci2
1Dipartimento di Energetica, Termofluidodinamica applicata e Condizionamenti ambientali, Università degli Studi di Napoli Federico II, Napoli, Italy
2Dipartimento di Ingegneria Aerospaziale e Meccanica, Seconda Università degli Studi di Napoli, Napoli, Italy
A two-dimensional transient analysis of the conjugate optical-thermal fields induced in a multilayer thin film structure on a glass substrate by a moving Gaussian laser source is carried out numerically.The workpiece is considered semi-infinite along the motion direction and the optical and thermophysical properties are assumed to be temperature dependent. The optical field is considered locally ...
A. Soveja1,2, J. M. Jouvard1, and D. Grevey1
1Institut Carnot de Bourgogne, Bourgogne, France
2Faculté de Génie Mécanique, Université "Politehnica" Timisoara, Timisoara, Romania
During laser-matter interaction, a very small layer of molten material forms. The vapor plumes, formed by material vaporization, exercise an overpressure on the molten material. In a previous work, a 1D thermal model was carried out, but this model did not account for all physical phenomena during laser-matter interaction. For that, it is necessary to couple the thermal equations, the fluids ...
J-.M. Dedulle1,2, F. Mercier1, D. Chaussende1, and M. Pons3
1Laboratoire des Matériaux et du Génie Physique, Grenoble, France
2IRIS Technologies, Grenoble, France
3Science et Ingénierie des Matériaux et Procédés, Saint-Martin d'Hères, France
The main problem for the development of 3C-SiC electronics is the lack of an adapted bulk growth process.Indeed, sublimation, which is the classical process for the growth of 4H-SiC and 6H-SiC ingots, is not adapted for the 3C polytype because of the solid state transition from cubic to hexagonal crystals, which occurs at high temperature. We therefore choose growth from liquid phase rather than ...
V. Memoli, and A. Cammi
Department of Nuclear Engineering, Politecnico di Milano, Milan, Italy
The moderator temperature coefficient (MTC) plays an important role within power thermal reactor dynamics. In order to run a reactor safely, a negative moderator coefficient temperature is necessary to reach stability during changes in temperature that can be caused by a step insertion of reactivity. Thus, MTC calculation is a key point in the reactor design process. The aim of the present work ...
J. Frassy1, C. Lecot2, M. Murariu3, C. Delattre1, and A. Soucemarianadin1
1Université Joseph Fourier, Grenoble, France
2Université de Savoie, Le Bourget-du-Lac, France
3LETI, CEA, Grenoble, France
We present simulations of drops spreading on random surfaces with either chemical or topographical heterogeneities. All the computations are made within the framework of the lubrication approximation. The droplet height is the solution of a time-dependent nonlinear fourth order partial differential equation, which is solved using COMSOL. Fast Fourier Transform (FFT) together with an appropriate ...
B. Benamar1, E. Favre2, A. Donnot1, and M. O. Rigo1
1 Laboratoire LERMAB, Faculté des Sciences et Techniques de Nancy, UMR, Vandoeuvre-lès-Nancy, France
2 COMSOL France, Grenoble, France
This paper presents the finite element solution for ionized fields in the coaxial cylinders configuration during the positive corona discharge using COMSOL Multiphysics. The coupled differential equations describing a monopolar DC corona are completely solved by using three application modes:PDE (General Form) mode for electric potential distribution, PDE (General Form) mode for space charge ...