La Houille Blanche
Numéro 1, Février 2008
|Page(s)||78 - 82|
|Section||Mécanique des fluides : écoulements diphasiques|
|Publié en ligne||20 mars 2008|
Couplage interfacial instationnaire de modèles diphasiques
Unsteady Interfacial coupling of two-phase flow models
EDF-R&D, Dépt. MFEE 6 quai Watier, 78400 Chatou
Auteur de correspondance : email@example.com
The primary coolant circuit in a nuclear power plant contains several distinct components (vessel, core, pipes,...). To these components correspond one or several codes which have been developed to solve specific systems of partial differential equations. In order to perform two-phase flow simulations over the whole primary circuit, the coupling of these codes has to be considered. The approach that has been examined within this work consists in coupling the codes by providing information through the coupling interface, taking unsteady effects into account. For that purpose, numerical fluxes calculated at the interface are used as boundary conditions for each code. The numerical technique relies on the use of an interface model, which is combined with the basic strategy that was introduced by Greenberg and LeRoux in order to compute approximations of steady solutions of non-homogeneous hyperbolic systems. Three different coupling cases have been examined : the coupling of a one-dimensional Euler system with a two-dimensional Euler system ; the coupling of two distinct homogeneous two-phase flow models ; the coupling of a four-equation homogeneous model with the standard six-equation two-fluid model.
Mots clés : Couplage interfacial / modèles diphasiques / volumes finis / systèmes hyperboliques / écoulements instationnaires.
© Société Hydrotechnique de France, 2008