The physical closure laws in the CATHARE code. CATHARE is a 2-fluid thermal-hydraulic code capable of simulating thermal and mechanical phenomena occurring in the primary and secondary circuits of PWRs for a wide variety of accidental situations. The description of the flow is essentially 1-dimensional. Closure laws concerning mass, momentum and energy exchanges between phases and between each phase and the walls are required. A set of specifically designed separate effect experiments were performed and analysed. Having regard for some development principles, correlations are established on the basis of experimental data. The mechanical transfer laws are derived first from experiments where thermal non equilibrium is negligible. Using them as a basis for further interpretation of experimental data, interfacial heat transfer laws are then developed. Wall heat transfer correlations then have to be fixed. All these steps are presented with emphasis being placed on the most recent developments. These last investigations concern the direct contact condensation, stratification model, wall friction, droplet break up and the scale effect, geometrical effect and pressure effect on interfacial friction.

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  1. Morin, Alexandre; Flåtten, Tore: A two-fluid four-equation model with instantaneous thermodynamical equilibrium (2016)
  2. Niu, Yang-Yao: Computations of two-fluid models based on a simple and robust hybrid primitive variable Riemann solver with AUSMD (2016)
  3. Bernard-Champmartin, A.; Poujade, O.; Mathiaud, J.; Ghidaglia, J.-M.: Modelling of an homogeneous equilibrium mixture model (HEM) (2014)
  4. Cordier, Floraine; Degond, Pierre; Kumbaro, Anela: Phase appearance or disappearance in two-phase flows (2014)
  5. Shekari, Younes; Hajidavalloo, Ebrahim: Application of Osher and PRICE-C schemes to solve compressible isothermal two-fluid models of two-phase flow (2013)
  6. Auder, Benjamin; Fischer, Aurélie: Projection-based curve clustering (2012)
  7. Martínez Ferrer, Pedro José; Flåtten, Tore; Tollak Munkejord, Svend: On the effect of temperature and velocity relaxation in two-phase flow models (2012)
  8. Faure, Sylvain; Ghidaglia, Jean-Michel: Violent flows in aqueous foams. I: Physical and numerical models (2011)
  9. Drouin, M.; Grégoire, O.; Simonin, O.; Chanoine, A.: Macroscopic modeling of thermal dispersion for turbulent flows in channels (2010)
  10. Meyapin, Y.; Dutykh, D.; Gisclon, M.: Velocity and energy relaxation in two-phase flows (2010)
  11. Munkejord, Svend Tollak; Evje, Steinar; Flåtten, Tore: A MUSTA scheme for a nonconservative two-fluid model (2009)
  12. Evje, Steinar; Flåtten, Tore: On the wave structure of two-phase flow models (2007)
  13. Guillard, H.; Duval, F.: A Darcy law for the drift velocity in a two-phase flow model (2007)
  14. Guillard, Hervé; Duval, Fabien; Latche, Jean Claude; Panescu, Roxana: Numerical multiphase modeling of bubbly flows (2007)
  15. Munkejord, Svend Tollak: Comparison of Roe-type methods for solving the two-fluid model with and without pressure relaxation (2007)
  16. Munkejord, Svend Tollak; Papin, Mikael: The effect of interfacial pressure in the discrete-equation multiphase model (2007)
  17. Ndjinga, Michaël: Influence of interfacial pressure on the hyperbolicity of the two-fluid model (2007)
  18. Munkejord, Svend Tollak: Partially-reflecting boundary conditions for transient two-phase flow (2006)
  19. De Vuyst, Florian: Stable and accurate hybrid finite volume methods based on pure convexity arguments for hyperbolic systems of conservation law. (2004)
  20. Evje, Steinar; Flåtten, Tore: Hybrid flux-splitting schemes for a common two-fluid model (2003)

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