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Sur un problème à frontière libre de la physique des plasmas

H. GourgeonJacqueline Mossino — 1979

Annales de l'institut Fourier

Ce papier porte sur l’étude mathématique d’une équation du type de Grad-Mercier qui décrit, dans certaines circonstances, l’équilibre d’un plasma confiné [H. Grad, P.N. Hu et D.C. Stevens, Proc. Nat. Acad. Sci. USA, 72,n 10 (1975), 3789–3793, C. Mercier, Publication of Euratom, CEA, Luxembourg (1974), C. Mercier, Communications personnelles à R. Temam et aux auteurs]. Il s’agit de trouver une fonction “régulière” u solution du système - Δ u + λ g [ δ ( u ) ] = 0 dans Ω , u = constante (inconnue) > 0 sur Ω , Ω u n = I , Ω est un ouvert borné régulier de...

On nonhomogeneous reinforcements of varying shape and different exponents

Mohamed BoutkridaJacqueline MossinoGonoko Moussa — 1999

Bollettino dell'Unione Matematica Italiana

Studiamo un problema ellittico quasilineare concernente un dominio circondato da un rinforzo sottile di spessore variabile, in cui il coefficiente dell'equazione è (localmente) non costante. Esso concerne due diversi esponenti, uno nel dominio e l'altro nel rinforzo, una condizione di Dirichlelet sulla frontiera esterna e una condizione di trasmissione. Prediciamo il comportamento asintotico della soluzione quando lo spessore, insieme con il coefficiente nel rinforzo, tende a zero perché essi siano...

Junction of elastic plates and beams

Antonio GaudielloRégis MonneauJacqueline MossinoFrançois MuratAli Sili — 2007

ESAIM: Control, Optimisation and Calculus of Variations

We consider the linearized elasticity system in a multidomain of 𝐑 3 . This multidomain is the union of a horizontal plate with fixed cross section and small thickness , and of a vertical beam with fixed height and small cross section of radius r ε . The lateral boundary of the plate and the top of the beam are assumed to be clamped. When and r ε tend to zero simultaneously, with r ε ε 2 , we identify the limit problem. This limit problem involves six junction conditions.

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