lumes Finis des écoulements diphasiques eau-vapeur. au cours du calcul (ce problème est d’ailleurs reproduit par tous les schémas. 1 sept. l’écoulement diphasique, mais perçoit néanmoins les déséquilibres Au cours du processus de moyenne duquel dérivent les modèles. Institut de mécanique des fluides de Toulouse. Résumé. On établit les équations locales de bilan d’un écoulement diphasique dispersé isotherme, à partir de.

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Using these results, jump conditions for turbulent flows are proposed.

les ecoulements diphasiques: Topics by

The Perthame scheme in English and A. Two different methods are used, according to the nature of the flow. High Reynolds numbers are un-affordable by direct simulation DNSand ecoulemwnt must either be performed by solving averaged equations RANSor by solving only the large ecoulemetn LESboth using a wall model.

Calculation programme for transient thermo-pneumatic flows; Programme de calcul pour les ecoulements transitoires thermopneumatiques. The frictions in the monophase domain have been taken into account. Experimental study of heat transfer for parallel flow in tube bundles with constant heat flux and for medium Prandtl numbers; Etude experimentale du transfert de chaleur dans des faisceaux tubulaires en ecoulement parallele pour diphaique densite de flux thermique constante dans le domaine des nombres de Prandtl moyens.

In the second one, called thin interface, the approximate immersed boundary lies on sides of mesh cells. Provided with these schemes, the whole numerical method preserves the liquid-vapor equilibria.

Validation by water and CFC11; Ecoulements diphasiques lors de la vidange de gaz liquifies initialement sous satures. Both reactive and non-reactive regimes are successfully compared with experimental data in terms of mean temperature and mean and RMS velocities.

Shocks in magneto-reactive-gas dynamics with application to the piston problem; Sur les chocs dans un milieu magnetodynamique reactif avec application au probleme du piston. As part of its mission, Les Impatients conserves the works of art created by the participants during the workshops.

The parameters of the latter may be computed solving small scale closure problems on a representative volume. In particular, we studied the complex dynamics of a transport barrier and we show through a simulation that resonant magnetic perturbations could control relaxation oscillations without a significant loss of confinement. It is based on infrared spectrometry, used for the first time to our knowledge for such an application, which gives the possibility to follow the drainage kinetics of oil and water in the presence of gas.


Modelling of the meridian flow in nominal and partial flow in axial and helico-centrifugal turbomachinery; Modelisation en regime nominal et partiel de l’ ecoulement meridien dans les turbomachines axiales et helicocentrifuges.

Les villages avoisinants s’en inspirent: The whole scheme preserves the physical features of all the variables which remain in the set of physical states. Today, the use of facilities belonging to EDF French Electricity Authority to provide water for winter resorts to make artificial snow represents a new phase.

Nous utilisons deux methodes differentes selon le regime d’ ecoulement. Nous montrons ensuite que ces conditions supplementaires peuvent etre deduites de l’analyse de la structure interne des detonations et des deflagrations magnetodynamiques. Up scaling two-phase flow in heterogeneous porous media; Mise a l’echelle des ecoulements diphasiques dans les milieux poreux heterogenes.

Est-il dans le monde ou le contient-il? On montre d’abord que la propagation de ces ondes n’est pas toujours completement determinee par les conditions initiales, les conditions aux limites et les conditions de choc.

Experimental study of heat exchange coefficients, critical heat flux and charge losses, using water-steam mixtures in turbulent flow in a vertical tube; Etude experimentale des coefficients d’echanges thermiques, des flux de chaleur critiques et des pertes de charge avec des melanges eau-vapeur en ecoulement turbulent dans un tube vertical.

Experiments were made both in free convection and forced convection, the latter case with and without an external source of ionisation. Moreover, the EDC model is as efficiency as the kinetic to compute the reaction rate in this reactor.

The existence of liquid films water, oiltheir thickness and their stability, control the distribution of fluids and the displacement of these fluids in the reservoir. Les figures multiples du maire.


Numerous quartz veins in the Soultz granite are opened and sealed during the Oligocene extension. Smooth forms of these closure laws are presented for the first time in this dissertation. The effect of various types of roughness on the wall of an axial tube in an annular space of mm cooled by an air-flow has been studied in the case of steady turbulence. Real fractures in a rocky mass are characterised by non parallel, flat and thus overlapped walls.

En utilisant les TIC pour exprimer leurs attentes et leurs besoins, les jeunes, Modelling of the flow in the interface of a composite liner at the bottom of a municipal waste landfill; Modelisation des ecoulements dans les interfaces des barrieres d’etancheite composites des installations de stockage de dechets.

The tubes were arranged in a pattern of equilateral triangles.

The second riphasique relies on the simultaneous and one dimensional resolution of a turbulent boundary layer equation and a variance transport equation near the wall. This study aims at characterizing helium two phase flows, and to identify the dependence of their characteristics on various thermo-hydraulic parameters: Transition vers le regime destructure.

In this study, a fast analysis code for the meridian flow inside turbo-machineries has been developed.

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This dissertation presents a new way to model two-phase flows in pipelines such as pipeline-riser systems. Les attaques des Termites Isoptera dans les parcelles de Their we make a revue of the two-phase models, defining their validity domains.

Fictitious domain methods for elliptic problems with general boundary conditions with an application to the numerical simulation of two phase flows; Methodes de domaine fictif pour des problemes elliptiques avec conditions aux limites generales en vue de la simulation numerique d’ ecoulements diphasiques. The burn-out flux following uniform ‘stopped’ heating has been studied in a channel containing still water.