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Planar flows of incompressible heat-conducting shear-thinning fluids — existence analysis

Miroslav Bulíček, Oldřich Ulrych (2011)

Applications of Mathematics

We study the flow of an incompressible homogeneous fluid whose material coefficients depend on the temperature and the shear-rate. For large class of models we establish the existence of a suitable weak solution for two-dimensional flows of fluid in a bounded domain. The proof relies on the reconstruction of the globally integrable pressure, available due to considered Navier’s slip boundary conditions, and on the so-called L -truncation method, used to obtain the strong convergence of the velocity...

Point fixe d'une application non contractante.

Pierre Gilles Lemarié-Rieusset (2006)

Revista Matemática Iberoamericana

We study a multilinear fixed-point equation in a closed ball of a Banach space where the application is 1-Lipschitzian: existence, uniqueness, approximations, regularity.

Problème de Stokes et système de Navier-Stokes incompressible à densité variable dans le demi-espace

Raphaël Danchin, Piotr Bogusław Mucha (2008/2009)

Séminaire Équations aux dérivées partielles

On s’intéresse à la résolution du système de Navier-Stokes incompressible à densité variable dans le demi-espace + n : = n - 1 × ] 0 , [ en dimension n 3 . On considère des données initiales à régularité critique. On établit que si la densité initiale est proche d’une constante strictement positive dans L W ˙ 1 , n et si la vitesse initiale est petite par rapport à la viscosité dans l’espace de Besov homogène B ˙ n , 1 0 alors le système de Navier-Stokes admet une unique solution globale. La démonstration repose sur de nouvelles estimations...

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