Download or read book R duction variationnelle d un couplage fluide structure written by Nicole Poussineau and published by . This book was released on 2007 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les simulations d'interaction fluide-structure, en particulier pour l'hémodynamique, sont très coûteuses en temps-calcul et nécessitent des domaines de calculs assez grands pour considérer l'influence de tout le système circulatoire. Des modèles réduits en dehors de la région d'intérêt sont donc utiles. Cependant il est difficile de trouver des conditions de couplage adéquates pour coupler des équations 3D de Navier-Stokes et d'élasticité avec des équations 1D obtenues grâce à des moyennes par section. Une nouvelle méthode de réduction dimensionnelle a été introduite. Elle permet d'écrire différents modèles 1D dont la richesse peut varier en fonction de la précision voulue. De plus, ces modèles se couplent naturellement avec le modèle 3D. Des résultats numériques et des applications médicales illustrent les utilisations possibles de ces modèles. Ceux-ci diminuent aussi assez le temps-calcul pour permettre la prise en compte de l'aléa (approximations sur la modélisation ou les données).
Download or read book Fluid Structure Interaction written by Alain Dervieux and published by . This book was released on 2000-12-01 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction fluide structure dans un dispositif vasculaire actif written by Antoine Fondaneche and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le recours à la simulation numérique de problèmes d'interaction fluide-structure est de plus en plus utilisée dans la plupart des secteurs d'activité. Pour résoudre ce type de problème, la majorité des études se concentre sur des approches lagrangiennes réputées très précises. Leur mise en oeuvre peut néanmoins devenir difficile pour certaines applications, notamment lorsque les déformations de la structure deviennent importantes ou que des variations topologiques se manifestent.Pour simuler de manière très versatile une grande diversité de problèmes d'interaction fluide-structure en deux dimensions impliquant des matériaux hyper-élastiques rigides, une méthode purement eulérienne a été favorisée. Dans le contexte des méthodes de domaines fictifs, la géométrie d'une structure est suivie de manière implicite via le formalisme level set, qui permet de définir une interface fluide-structure diffuse. Un modèle unifié à "un seul milieu" est résolu de manière monolithique à l'aide d'une méthode Volume Fini sur maillages cartésiens hiérarchiques de type quadtree. Cette approche offre un bon compromis entre précision du schéma numérique et faisabilité de la simulation du problème multi-physiques, notamment grâce au processus d'adaptation de maillage AMR dynamique. La construction des schémas de discrétisation en espace repose sur l'utilisation de stencils compacts, de sorte à garantir une efficacité optimale du parallélisme.La méthode numérique est validée conformément à la littérature et le bénéfice obtenu, en termes de temps de calcul, via l'utilisation de maillages adaptatifs dynamiques est mise en évidence. En s'appuyant sur une analyse asymptotique en une dimension du schéma de discrétisation, une stabilisation de la méthode Volume Fini est effectuée afin d'améliorer sa robustesse, en particulier pour une meilleure prise en compte de matériaux très rigides. La simulation d'un écoulement axisymétrique bidimensionnel dans un dispositif d'assistance cardiaque (géométrie LVAD) est proposée comme application bio-médicale.
Download or read book Fluid Structure Interaction and Biomedical Applications written by Tomas Bodnar and published by . This book was released on 2014-10-31 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction fluide structure written by Mhamed Souli and published by . This book was released on 2009 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Couplage fluide structure written by Emmanuel de Langre and published by . This book was released on 1999 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PanVascular Medicine written by Peter Lanzer and published by Springer. This book was released on 2015-03-30 with total page 5004 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vascular management and care has become a truly multidisciplinary enterprise as the number of specialists involved in the treatment of patients with vascular diseases has steadily increased. While in the past, treatments were delivered by individual specialists, in the twenty-first century a team approach is without doubt the most effective strategy. In order to promote professional excellence in this dynamic and rapidly evolving field, a shared knowledge base and interdisciplinary standards need to be established. Pan Vascular Medicine, 2nd edition has been designed to offer such an interdisciplinary platform, providing vascular specialists with state-of-the art descriptive and procedural knowledge. Basic science, diagnostics, and therapy are all comprehensively covered. In a series of succinct, clearly written chapters, renowned specialists introduce and comment on the current international guidelines and present up-to-date reviews of all aspects of vascular care.
Download or read book PROMOTION DE LA SANTE ET AUTONOMISATION DANS LE CONTEXTE AFRICAIN written by David HouŽto and published by Lulu.com. This book was released on 2014-02-26 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le terme promotion de la santé en Afrique, près de 30 ans après l'adoption de la Charte d'Ottawa, continue d'avoir des connotations complètement hors du sens que lui confère cette charte. Cela n'est pas étonnant quand on sait que la notion de santé dans ce contexte africain équivaut à la lutte contre la maladie à travers les soins de santé dispensés par des professionnels de la santé dans des formations sanitaires et les hôpitaux. L'évolution que connait le continent depuis quelques décennies est de donner un peu plus de place à la communauté à travers les relais communautaires dans une participation communautaire vidée de son contenu, car le pouvoir n'est jamais passé entre les mains des communautés.C'est au vu de tout ceci que le présent ouvrage à sa raison d'être pour expliquer les fondements de l'autonomisation communautaire et de la promotion de la santé avec leur importance pour la région africaine en proie aux mauvais indicateurs de santé comparativement aux autres régions du monde.
Download or read book Comptes rendus de l Acad mie des sciences written by and published by . This book was released on 1997-07 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book History of Nonlinear Oscillations Theory in France 1880 1940 written by Jean-Marc Ginoux and published by Springer. This book was released on 2017-04-18 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reveals the French scientific contribution to the mathematical theory of nonlinear oscillations and its development. The work offers a critical examination of sources with a focus on the twentieth century, especially the period between the wars. Readers will see that, contrary to what is often written, France's role has been significant. Important contributions were made through both the work of French scholars from within diverse disciplines (mathematicians, physicists, engineers), and through the geographical crossroads that France provided to scientific communication at the time. This study includes an examination of the period before the First World War which is vital to understanding the work of the later period. By examining literature sources such as periodicals on the topic of electricity from that era, the author has unearthed a very important text by Henri Poincaré, dating from 1908. In this work Poincaré applied the concept of limit cycle (which he had introduced in 1882 through his own works) to study the stability of the oscillations of a device for radio engineering. The “discovery” of this text means that the classical perspective of the historiography of this mathematical theory must be modified. Credit was hitherto attributed to the Russian mathematician Andronov, from correspondence dating to 1929. In the newly discovered Poincaré text there appears to be a strong interaction between science and technology or, more precisely, between mathematical analysis and radio engineering. This feature is one of the main components of the process of developing the theory of nonlinear oscillations. Indeed it is a feature of many of the texts referred to in these chapters, as they trace the significant developments to which France contributed. Scholars in the fields of the history of mathematics and the history of science, and anyone with an interest in the philosophical underpinnings of science will find this a particularly engaging account of scientific discovery and scholarly communication from an era full of exciting developments.
Download or read book Index of Mathematical Papers written by and published by . This book was released on 1973 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PASCAL explore written by and published by . This book was released on 1989 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanics of the Circulation written by C. G. Caro and published by Cambridge University Press. This book was released on 2012 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classic book outlines the anatomy and physiology of the circulation and explains the mechanical principles that govern it.
Download or read book Yoga for Your Mood Deck written by and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book French English Medical Dictionary written by Alfred Gordon and published by . This book was released on 1921 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hobbes and Galileo Method Matter and the Science of Motion written by Gregorio Baldin and published by Springer Nature. This book was released on 2020-04-15 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, translated from Italian, discusses the influence of Galileo on Hobbes’ natural philosophy. In his De motu, loco et tempore or Anti-White (~ 1643), Thomas Hobbes describes Galileo as “the greatest philosopher of all times”, and in De Corpore (1655), the Italian scientist is presented as the one who “opened the door of all physics, that is, the nature of motion.” The book gives a detailed analysis of Galileo’s legacy in Hobbes’s philosophy, exploring four main issues: a comparison between Hobbes’ and Mersenne’s natural philosophies, the Galilean Principles of Hobbes’ philosophical system, a comparison between Galileo’s momentum and Hobbes’s conatus , and Hobbes’ and Galileo’s theories of matter. The book also analyses the role played by Marin Mersenne, in spreading Galileo’s ideas in France, and as a discussant of Hobbes. It highlights the many aspects of Hobbes’ relationship with Galileo: the methodological and epistemological elements, but also the conceptual and the lexical analogies in the field of physics, to arrive, finally, at a close comparison on the subject of the matter. From this analysis emerges a shared mechanical conception of the universe open and infinite, that replaces the Aristotelian cosmos, and which is populated by two elements only: matter and motion.
