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High Vacuum Gas Pumping and Boundary Coupling

M. Cavenago
INFN/LNL, Laboratori Nazionali di Legnaro, Legnaro, Italy

Many scientific instruments are based on high vacuum equipment with a gas pressure maintained in the order of 1 Pa or below. The gas flow in the low ...

Thermal Design of Power Electronic Devices and Modules

N. Delmonte[1], M. Bernardoni[1], P. Cova[1], and R. Menozzi[1]
[1]Dipartimento di Ingegneria dell’Informazione, University of Parma, Parma, Italy

This work describes a way to apply 3D Finite Element Analysis (FEA) to the thermal design of power electronic modules using simplified geometry models of the system components. The method here presented can overcome the problem of solving equation systems with a very high number of Degrees Of Freedom (DOF) due to complex geometry of a power module.

3-D Finite Element Modeling of Brain Edema: Initial Studies on Intracranial Pressure Using COMSOL Multiphysics®

X.G. Li[1], H. von Holst[1][2], J. Ho[1], and S. Kleiven[1]

[1]Division of Neuronic Engineering, KTH, Stockholm, Sweden
[2]Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden

Brain edema is one of the most common consequences of serious traumatic brain injuries which is usually accompanied with increased Intracranial ...

Fundamental Three Dimensional Modeling and Parameter Estimation of a Diesel Oxidation Catalyst for Heavy Duty Trucks

A. Holmqvist[1] and C.U.I. Odenbrand[1]


[1]Department of Chemical Engineering, Faculty of Engineering, LTH, Lund University, Lund, Sweden

Mathematical optimization can be used as a computational engine to generate the best solution for a given problem in a systematic and efficient way. In ...

Numerical Study of an LTD Stirling Engine with Porous Regenerator

N. Martaj[1], P. Rochelle[1][2], L. Grosu[1], R. Bennacer[3], and S. Savarese[4]
[1]Universitè de Paris, Paris, France
[2]Institut Jean Le Rond d'Alembert, Université Paris 6
[3]Laboratoire LEEVAM «Environnement, Energétique, Valorisation, Matériaux», Universitéde Cergy-Pontoise
[4]COMSOL France, 5 pl. R Schuman, 38000 Grenoble

The alternative engines of Stirling type, are engines running on "hot air", using both an external heat source and regeneration. They should be ...

Thermo-fluid Dynamics Modelling of Hydrogen Absorption and Desorption in a LaNi4.8Al0.2 Hydride Bed

D. Baldissin[1] and D. Lombardo[1]
[1]Compumat S.r.l., Torino, Italy

A two-dimensional mathematical model for the absorption and desorption of H2 in LaNi4.8Al0.2 was developed and experimentally validated. The model is ...

Long Term Performance Of Borehole Heat Exchanger Fields With Groundwater Movement

S. Lazzari, A. Priarone, and E. Zanchini
DIENCA, University of Bologna, Bologna, Italy

A numerical investigation of the long-term performance of double U-tube borehole heat exchanger (BHE) fields, in the case of non-negligible effects of ...

Convergence Rates For Models With Coupled 1D / 2D Subdomains

A. Bradji[1], E. Holzbecher[2], and M.S. Litz[2]
[1]Department of Mathematics, University of Annaba, Algeria
[2]Georg-August Universität Göttingen, Germany

It is well known that the convergence rate of a numerical model is significantly reduced, when the genuine character of the setting with differential ...

Thermal Properties of Copper Tungsten with Copper Via Composite

J. Ma[1], A. Parker[1], and K. Kuan[2]
[1]Southeastern Louisiana University, Hammond, LA, USA
[2]Torrey Hill Technology LLC, SanDiego, CA, USA

This study focuses on a low-cost composite material based on CuW with Cu via, which functions as a more efficient thermal path for heat conduction. A ...

Transient Analysis of the Triggering Behaviour of Safety Fuses

F. Loos, and H.-D. Ließ
Universität der Bundeswehr München
München, Germany

The purpose of this work is to investigate the triggering behaviour of safety fuses for mobile on board supply systems. The influence of different ...