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Modelisation Numerique Multiphysique Et Multi Echelles De La Solidification Des Alliages Sous La Convection Forcee
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Book Synopsis Modélisation Numérique Multiphysique Et Multi-échelles de la Solidification Des Alliages Sous la Convection Forcée by : Csaba Nagy
Download or read book Modélisation Numérique Multiphysique Et Multi-échelles de la Solidification Des Alliages Sous la Convection Forcée written by Csaba Nagy and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminium and aluminium-based alloys are widely in industry due to the corrosion passivity, lighter weight, yet - in several cases - comparable strength with steel. Often, the material is used “as-cast“, that means that composition, macro- and microstructure of the material emerged during the casting defines its behaviour under different loads. Yet, convective flows generally arise in casting processes performed on-ground because of gravity and modify local solidification conditions, and, consequently, solute distribution and affect properties of material. To understand and to be able to control such phenomena, detailed experimental and numerical work has been needed.Two Bridgman-type furnaces were constructed in the University of Miskolc, Hungary, by MTA-ME Materials Science Research Group in the framework of the ESA funded MICAST project for experimental study of the effect of convective flow in solidification of alloys. These facilities were equipped with electromagnetic systems capable to generate rotating and travelling magnetic fields of various intensities.Multiphase models developed at SIMaP/EPM, Grenoble, France, were applied for numerical study of the solidification of binary and ternary aluminium alloys under electromagnetically generated convective flow. Solidification of a binary Al-Si alloy under RMF stirring was done with Euler-Euler ensemble averaging and lever rule mesoscale models coupled with the macroscale transport both in 2D and 3D geometries. Further, effect of various modes of TMF stirring during solidification of a ternary alloys was studied in 3D geometry with lever rule based macroscopic model. Results of numerical simulations well explain the segregation observed in the experimental samples.
Book Synopsis Etude de l'influence de la convection naturelle et forcée sur le processus de la solidification by : Lakhdar Hachani
Download or read book Etude de l'influence de la convection naturelle et forcée sur le processus de la solidification written by Lakhdar Hachani and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail se situé dans la perspective d'un contrôle de la structure de solidification des alliages métalliques sous l'effet de la convection naturelle et forcée afin d'améliorer à terme la maîtrise des microstructures de solidification grâce à un brassage électromagnétique efficace permettant d'avoir une homogénéisation du bain liquide qui par la suite peut améliorer la microstructure finale de l'alliage. La possibilité retenue dans ce travail est de réaliser ce brassage sans contact avec la solution liquide (alliage sous fusion) et sans pollution par d'autres éléments en utilisant un brassage par la force de Lorentz. L'objet de la thèse comporte une étude théorique à la fois expérimentale basée sur une installation expérimentale particulièrement documentée et instrumentée, développée au laboratoire SIMAP/EPM à Grenoble, nommée AFRODITE. Ce dispositif expérimental permet de fournir des données de quantitatives et qualitatives sur le processus de solidification des alliages métalliques. Ces données sont nécessaires à la contribution aux études menées sur la solidification des alliages métallique et enrichir la base des donnée des modèles numériques développés pour prédire les défauts liés à la solidification. L'alliage choisi dans notre travail est l'étain-plomb, vue sa basse température de fusion. Les expériences envisagées visent à étudier l'effet de deux modes de configuration dynamique sur la solidification de l'alliage Sn-Pb: la convection thermosolutale avec la variation de deux paramètres essentiels (la vitesse de refroidissement et la différence de température expérimentale) et la convection forcée par l'utilisation de plusieurs modes de brassage électromagnétique. Cette étude s'intéresse en particulier à la caractérisation des macrostructures et les défauts liés à la macroségrégation. L'originalité de l'étude vise à mesurer in situ les températures instantanées. Ceci nous a permis d'évaluer l'évolution du transfert thermique due à la convection naturelle/forcée, ainsi que leurs influence sur le processus de la solidification sous différents aspects. L'analyse post-mortem de l'alliage métallique, fournit la structure de solidification et la distribution des ségrégations à différentes échelles (mésoscopique et macroscopique).
Book Synopsis Modélisation numérique de la solidification des alliages métalliques binaires by : Anne Noeppel
Download or read book Modélisation numérique de la solidification des alliages métalliques binaires written by Anne Noeppel and published by . This book was released on 2009 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les alliages métalliques binaires obtenus par solidification doivent répondre à des exigences de qualité, ce qui suppose de contrôler le procédé de solidification. Ce contrôle est cependant imparfait car la compréhension des mécanismes à l'origine des ségrégations et de la transition colonnaires et équiaxes (CET) est encore partielle. Un modèle numérique multiphasique macroscopique a été utilisé pour quantifier l'influence de la convection naturelle et forcée sur le devenir des ségrégations. Puis, on s'est attaché à compléter le modèle développé dans le cas de structures purement équiaxes. Enfin des simulations de transition colonnaire équiaxe 1D ont été effectuées. Une comparaison avec des résultats expérimentaux a permis d'effectuer une validation du modèle et de l'appliquer aux expériences planifiées du projet Impress. Un développement 2D de la transition colonnaire équiaxe est également proposé
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis "All it Is, It's a Carnival" by : Mária Németh Lenke
Download or read book "All it Is, It's a Carnival" written by Mária Németh Lenke and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mood Choice in Complement Clauses by : Toth
Download or read book Mood Choice in Complement Clauses written by Toth and published by Peter Lang. This book was released on 2008 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volume investigates various approaches to mood distribution and mood variation in lexically selected complement clauses with special reference to Hungarian data. Its primary aim is to show that semantic factors play a crucial role in mood choice. The analysis focuses on the indicative/non-indicative opposition, the latter category includes the subjunctive, the imperative and the conditional. Critical discussion, revision and elaboration of previous semantic approaches pertaining to mood choice are presented, with particular emphasis on the applicability of the various analyses to mood phenomena in Hungarian. The author proposes two novel hypotheses about mood choice in Hungarian complement clauses.
Book Synopsis Forest Fire Research by : Universidade de Coimbra
Download or read book Forest Fire Research written by Universidade de Coimbra and published by . This book was released on 2010 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Continuum Theory of Rock Mechanics by : Csaba Asszonyi
Download or read book The Continuum Theory of Rock Mechanics written by Csaba Asszonyi and published by . This book was released on 1979 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tortenet written by Bela Balazs and published by Createspace Independent Publishing Platform. This book was released on 2016-03-17 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Notice: This Book is published by Historical Books Limited (www.publicdomain.org.uk) as a Public Domain Book, if you have any inquiries, requests or need any help you can just send an email to [email protected] This book is found as a public domain and free book based on various online catalogs, if you think there are any problems regard copyright issues please contact us immediately via [email protected]
