Dans ce mémoire, on s’intéresse à la simulation des écoulements liquide-vapeur en transition de phase. Pour décrire ces écoulements, une approche bifluide. Résumé: On s’intéresse dans ce travail à la simulation des écoulements diphasiques. Différents modèles, tous hyperboliques, sont considérés suivant les . Download Citation on ResearchGate | Ecoulement diphasique compressible et immiscible en milieu poreux: analyse mathématique et numérique | L’objectif de .
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The critical configuration and the maximum mass flowrate as well as the variables of the flow pressure and temperature predicted from the model are in good agreement with the experimental results. Volume 53, Number 6November-December The theory allows to understand and ecoupement justify the existence of the so-called multichoked flow. Provided with these schemes, the whole numerical method preserves the liquid-vapor equilibria.
Thursday, November 15, – This thesis is devoted to the modelling and numerical simulation of liquid-vapor flows.
TEL – Thèses en ligne – Modélisation et simulation numérique des écoulements diphasiques
By assuming the two-phase mixture as homogeneous, the treatment of the physical conservation laws makes it diphasiqe to obtain an analytical equation of the fluid evolution which expresses the difference between the Fanno and the isothermal evolutions. Nicolas Seguin 1 AuthorId: The results are systematically verified by considering the limit of a single phase ideal gas flow.
Using this numerical method, a careful comparison between the one- and two-pressure two-fluid models is presented. This scalar equation is a simplified model of a oil-liquid mixture flowing in a porous media. ecooulement
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Latest newsletter Previous newsletters. Data correspond to usage on the plateform after Vincent Guillemaud 1 AuthorId: Several hyperbolic models are considered here.
The mathematical properties of this model are thereafter examined. Current usage metrics About article metrics Return diiphasique article. Friday, July 18, – Significant inertial effects are observed for many applications such as flow in the near-wellbore region, in very permeable reservoirs or in packed-bed reactors.
In these cases, the classical description of two-phase flow Files in this item. In order to describe these phase transition flows, a two-fluid two-pressure approach is considered.
This description of the liquid-vapor mixing is associated to the seven-equation model introduced by Baer and Nunziato. Furthermore, we establish the dipyasique and nonlinear stabilities of the liquid-vapor equilibrium. The convective part is approximated by Finite Volume schemes and the relaxation terms are taken into account with the help of a splitting method.
Have you forgotten your login? It is applied to the two-phase flow through discharge lines involving geometrical singularities sudden enlargement for example.
Modélisation et simulation numérique des écoulements diphasiques
First, a theoretical thermodynamic framework is constructed to describe the liquid-vapor mixing. This work investigates the properties of ecoulemenh model in order to simulate the phase transition flows occurring in nuclear engineering. Friday, April 9, – 1: Such regimes for the two-phase flows are analogous to the torrential and fluvial regimes for the shallow-water equations.
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