R. Verhelle, L. Van Lokeren, S. Loulidi, H. Boyd, G. Van Assche
Physical Chemistry & Polymer Science, Vrije Universiteit Brussel, Brussels, Belgium
Heerema Marine Contractors, Leiden, The Netherlands
COMSOL Multiphysics® software is used to model the field joint application process on carbon steel pipelines for deep sea crude oil transportation, taking into account not only heat transfer, cure kinetics, and crystallization, but also thermal, cure and crystallization shrinkage and the resulting interfacial thermal stresses. Experimental data from the raw materials are implemented in the model ...
M. Penzel , M. Hackert-Oschätzchen , M. Kreißig , M. Kowalick , M. Zinecker , A. Schubert , G. Meichsner ,
 Professorship Micromanufacturing Technology, Technische Universität Chemnitz, Chemnitz, Germany
 Professorship Micromanufacturing Technology, Technische Universität Chemnitz, Chemnitz, Germany; Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany
 Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany
Precise electrochemical machining (PEM) is a non-conventional machining technology, based on anodic dissolution of metallic work-pieces. In this study an additional extension of the precise electrochemical machining with a precise angle-controlled cylinder positioning is aimed. Due to the help of the angle-controlled cylinder positioning, with PEM e.g. stamping and extrusion dies can be ...
R. Kiflemariam, H. Fekramandi, C. Lin
Department of Mechanical & Materials Engineering, Florida International University, Miami, FL, USA
A 3D electro-conjugate heat transfer model was made to study an embedded microfluidic/TEG system (μF/TEG) system. An innovative embedded microfluidic/TEG system (μF/TEG) system is proposed which enables a device to be able to provide power to its cooling system eliminating external power input and resulting in energy efficient and more reliable heat removal system. The research identifies ...
F. L. Durán Martínez , A. M. Billet , C. Julcour-Lebigue , F. Larachi ,
 Toulouse University, Toulouse, France
 Laval University, Quebec, Canada
In the present work, numerical simulations of a Monolith Reactor (MR) are carried out in order to develop a pre-design tool for industrial-scale reactors applied to highly exothermal reactions. The reacting circular channels (2-4 mm internal diameter) are coated with a few micron thick catalytic layer (washcoat), and host a gas-liquid segmented flow (the so-called Taylor flow) known to enhance ...
Thermomechanical Design of a Gas Turbine Reheat Combustor Experiment Using FEM Analysis with the COMSOL Multiphysics® Software
F. M. Berger , M. Eser , T. Sattelmayer ,
 Lehrstuhl für Thermodynamik, Technical University of Munich, Munich, Germany
Enhanced operational flexibility and low levels of pollutant emissions are achieved with a sequential arrangement of premixed combustion stages in gas turbines for power generation. In the second – reheat – combustion stage, hot flue gases of approximately 1500K are enriched with fuel and establish a self-igniting flame – i.e. flame stabilization occurs mainly through auto-ignition. This work is ...
Modeling Implementation of Smart Materials such as Shape Memory Alloys and Electro-Active Metamaterials
Femto-STInstitute UMR CNRS 6174 Dept Applied Mechanics,
Manuel Collet is a member of the Department of Applied Mechanics of the FEMTO-ST Institute. He graduated with a degree in Mechanical Engineering from Ecole Centrale de Lyon in 1992 and obtained his PhD in 1996 about Active control of vibrating structures by mean of semi distributed piezoelectric patches. His main research lines currently involve smart structures and active Control, ...
A. Malachowska, L. Pawlowski , A. Ambroziak , M. Winnicki , P. Sokolowski
University of Limoges, Limoges, France
Wroclaw University of Technology, Wroclaw, Poland
This paper studies oxide forming on titanium, during cold gas dynamic spraying with air. This is a quite new spraying method, which can be used to spray material having high affinity for oxygen. The model allows for the diffusion of oxygen through the oxide layer, reaction on the oxide-titanium interface and expansion of oxide, due to difference in molar density. It was implemented in COMSOL ...
P. Zilio , W. Raja , A. Alabastri , R. Proietti Zaccaria 
 Istituto Italiano di Tecnologia, Italy
 Istituto Italiano di Tecnologia, Italy
 Rice University, USA
The formation of space charge clouds is a well known problem that affects thermionic emitters in regimes of high current emission. Although some analytical models have been presented, suitable for 1D geometries, the modeling of the problem in complex 3D structures remains a challenge due to the mutual coupling between electron trajectories and field they produce. Here we propose a model able to ...
H. Arab, S. Memiaghe, C. Akyel
Ecole Polytechnique of Montreal, Montreal, QC, Canada
This paper deals with a numerical modelling technique based on finite elements method for computing magnetic field and current density distributions in high temperature Superconducting (HTS) tapes. The model is developed using the T-ῼ formulation for which the degree of freedom (DOF) and the CPU time decreased considerably in AC losses analysis, and it is also observe that T-ῼ formulation give ...
Z. S. Gul, N. Xiang, M. Caliskan
Department of Architecture, Middle East Technical University, Ankara, Turkey
School of Architecture, Rensselaer Polytechnic Institute, Troy, NY, USA
Department of Mechanical Engineering, Middle East Technical University, Ankara, Turkey
Sound energy distribution patterns within enclosed spaces are the basic concerns of architectural acoustics. Energy decays are analyzed for major acoustical parameter estimations, while spatial energy distribution and flow vectors are indicative in the analysis of sound energy circulation and concentration zones. In this study the acoustical field of a real-size multi-domed monumental ...