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Book Description
Régularité des équations de Stokes et de Navier-Stokes. Méthodes d'éléments finis mixtes pour les équations de Stokes, pour les équations de Navier-Stokes. Formulation variationnelle mixte des équations de Navier-Stokes en dimension 3.
Book Description
Régularité des équations de Stokes et de Navier-Stokes. Méthodes d'éléments finis mixtes pour les équations de Stokes, pour les équations de Navier-Stokes. Formulation variationnelle mixte des équations de Navier-Stokes en dimension 3.
Author: F. Thomasset Publisher: Springer Science & Business Media ISBN: 3642870473 Category : Science Languages : en Pages : 168
Book Description
In structure mechanics analysis, finite element methods are now well estab lished and well documented techniques; their advantage lies in a higher flexibility, in particular for: (i) The representation of arbitrary complicated boundaries; (ii) Systematic rules for the developments of stable numerical schemes ap proximating mathematically wellposed problems, with various types of boundary conditions. On the other hand, compared to finite difference methods, this flexibility is paid by: an increased programming complexity; additional storage require ment. The application of finite element methods to fluid mechanics has been lagging behind and is relatively recent for several types of reasons: (i) Historical reasons: the early methods were invented by engineers for the analysis of torsion, flexion deformation of bearns, plates, shells, etc ... (see the historics in Strang and Fix (1972) or Zienckiewicz (1977». (ii) Technical reasons: fluid flow problems present specific difficulties: strong gradients,l of the velocity or temperature for instance, may occur which a finite mesh is unable to properly represent; a remedy lies in the various upwind finite element schemes which recently turned up, and which are reviewed in chapter 2 (yet their effect is just as controversial as in finite differences). Next, waves can propagate (e.g. in ocean dynamics with shallowwaters equations) which will be falsely distorted by a finite non regular mesh, as Kreiss (1979) pointed out. We are concerned in this course with the approximation of incompressible, viscous, Newtonian fluids, i.e. governed by N avier Stokes equations.
Author: Vivette Girault Publisher: Springer Science & Business Media ISBN: 3642616232 Category : Mathematics Languages : en Pages : 386
Book Description
The material covered by this book has been taught by one of the authors in a post-graduate course on Numerical Analysis at the University Pierre et Marie Curie of Paris. It is an extended version of a previous text (cf. Girault & Raviart [32J) published in 1979 by Springer-Verlag in its series: Lecture Notes in Mathematics. In the last decade, many engineers and mathematicians have concentrated their efforts on the finite element solution of the Navier-Stokes equations for incompressible flows. The purpose of this book is to provide a fairly comprehen sive treatment of the most recent developments in that field. To stay within reasonable bounds, we have restricted ourselves to the case of stationary prob lems although the time-dependent problems are of fundamental importance. This topic is currently evolving rapidly and we feel that it deserves to be covered by another specialized monograph. We have tried, to the best of our ability, to present a fairly exhaustive treatment of the finite element methods for inner flows. On the other hand however, we have entirely left out the subject of exterior problems which involve radically different techniques, both from a theoretical and from a practical point of view. Also, we have neither discussed the implemen tation of the finite element methods presented by this book, nor given any explicit numerical result. This field is extensively covered by Peyret & Taylor [64J and Thomasset [82].
Author: Christine Bernardi
Author: Christine Bernardi
Author: André Martin Essombé Edimo
Author: F. Thomasset
Author: Ahcène Brahmi
Author: Ahcène Brahmi
Author: Jean-Claude Benazeth (auteur d'une thèse de sciences.)
Author: Jean-Claude Benazeth
Author: Jean-Claude Benazeth
Author: Vivette Girault
Author: LABADIE G.