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 .
| Author: | Mikakinos Samulabar |
| Country: | Moldova, Republic of |
| Language: | English (Spanish) |
| Genre: | Politics |
| Published (Last): | 19 July 2005 |
| Pages: | 78 |
| PDF File Size: | 9.5 Mb |
| ePub File Size: | 10.8 Mb |
| ISBN: | 459-9-47884-939-2 |
| Downloads: | 15601 |
| Price: | Free* [*Free Regsitration Required] |
| Uploader: | Fenrizshura |
The proposed model is validated on the basis of experimental data obtained for quasi steady-state discharges of pure nitrogen and water-nitrogen mixture through a complex pressure relief line involving several abrupt enlargements. Nicolas Seguin 1 AuthorId: Two Finite Volume schemes are proposed and tested in agreement with the resonant behavior of this model. Scoulement with this framework, various modelling choices are suggested for the interaction terms between the phases.
First, we focus on the definition of its weak solutions. Several hyperbolic models are considered here. Latest newsletter Previous newsletters.
There was a problem providing the content you requested
Previous article Next article. This work focuses on the stationary one-phase Newtonian flow in a class of homogeneous porous media at large enough flow rates leading to a non-linear relationship between the filtration velocity siphasique the pressure gradient.
Metrics Show article metrics. JavaScript is disabled for your browser. An original approximate Godunov scheme, which enables diphasiqud simulate steady states and dry zones, is presented and compared with the methods used in the industrial context.
TEL – Thèses en ligne – Modélisation et simulation numérique des écoulements diphasiques
Services Same authors – Google Scholar. On the basis of its differential form and the second principle of thermodynamic, the properties of this flow are discussed.
Finally, the implementation diphasiwue a turbulence model and the introduction of a reconstruction process for the interfacial area are investigated in order to refine the description of the interfacial transfers. One shows that this maximum length is a function of the mass quality as well as the initial conditions, i. In these cases, the classical description of two-phase flow It is applied to the two-phase flow through discharge lines involving geometrical singularities sudden enlargement for example.
Data correspond to usage on the plateform after Volume 53, Number 6November-December Wednesday, October 10, – 1: First, various nonconservative adaptations of standard Riemann solvers are developed to approach the convective part. Furthermore, we establish the linear and nonlinear stabilities of the liquid-vapor equilibrium.
Tuesday, September 11, – 9: Furthermore, a new relaxation scheme is proposed to approach the interfacial transfers. The numerical simulation of the strongly unbalanced liquid-vapor flows is at last applied to the safety analysis of the pressurized water nuclear reactors. In the first part, recent Finite Volume ciphasique are compared for the approximation of the Homogeneous Equilibrium Model, in particular when the simulation involves low densities.
For a length greater than this maximum one, the flow is no more possible. Nicolas Seguin 1 Details. Have you forgotten your login? This work investigates the properties of this model in order to simulate the phase transition flows occurring in nuclear engineering.
Eckulement starting point of the procedure This scalar equation is a simplified model of a oil-liquid mixture flowing in a porous media. The main topic of diphasiuqe work is the simulation of two-phase flows.
Modélisation et simulation numérique des écoulements diphasiques
Friday, April 9, – 1: Unlike the classic nonconservative framework, these schemes converge towards the same solution. 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. Such regimes for the two-phase flows are analogous to the torrential and fluvial regimes for the shallow-water equations.
Several numerical experiments are investigated: