Etude des instabilités hydro dynamiques de Kelvin-Helmotz et Rayleigh-Taylor en présence de transition de phase (thèse 2015 - 2018)
Activités
Modélisation des écoulements diphasiques et interfaces diffuses
Publications scientifiques au M2P2
2017
Alexandre Chiapolino, Richard Saurel, Boniface Nkonga. Sharpening diffuse interfaces with compressible fluids on unstructured meshes. Journal of Computational Physics, 2017, 340, pp.389-417. ⟨hal-01589124⟩ Plus de détails...
Alexandre Chiapolino, Pierre Boivin, Richard Saurel. A simple phase transition relaxation solver for liquid-vapor flows. International Journal for Numerical Methods in Fluids, 2017, 83 (7), pp.583-605. ⟨10.1002/fld.4282⟩. ⟨hal-01359203⟩ Plus de détails...
Determining liquid-vapor phase equilibrium is often required in multiphase flow computations. Existing equilibrium solvers are either accurate but computationally expensive, or cheap but inaccurate. The present paper aims at building a fast and accurate specific phase equilibrium solver, specifically devoted to unsteady multiphase flow computations. Moreover, the solver is efficient at phase diagram bounds, where non-equilibrium pure liquid and pure gas are present. It is systematically validated against solutions based on an accurate (but expensive) solver. Its capability to deal with cavitating, evaporating and condensing two-phase flows is highlighted on severe test problems both 1D and 2D.
Alexandre Chiapolino, Pierre Boivin, Richard Saurel. A simple phase transition relaxation solver for liquid-vapor flows. International Journal for Numerical Methods in Fluids, 2017, 83 (7), pp.583-605. ⟨10.1002/fld.4282⟩. ⟨hal-01359203⟩
Journal: International Journal for Numerical Methods in Fluids
Alexandre Chiapolino, Pierre Boivin, Richard Saurel. A simple and fast phase transition relaxation solver for compressible multicomponent two-phase flows. Computers and Fluids, 2017, 150, pp.31 - 45. ⟨10.1016/j.compfluid.2017.03.022⟩. ⟨hal-01502389⟩ Plus de détails...
The present paper aims at building a fast and accurate phase transition solver dedicated to unsteady multiphase flow computations. In a previous contribution (Chiapolino et al. 2017), such a solver was successfully developed to compute thermodynamic equilibrium between a liquid phase and its corresponding vapor phase. The present work extends the solver's range of application by considering a multicomponent gas phase instead of pure vapor, a necessary improvement in most practical applications. The solver proves easy to implement compared to common iterative procedures, and allows systematic CPU savings over 50%, at no cost in terms of accuracy. It is validated against solutions based on an accurate but expensive iterative solver. Its capability to deal with cavitating, evaporating and condensing two-phase flows is highlighted on severe test problems both 1D and 2D.
Alexandre Chiapolino, Pierre Boivin, Richard Saurel. A simple and fast phase transition relaxation solver for compressible multicomponent two-phase flows. Computers and Fluids, 2017, 150, pp.31 - 45. ⟨10.1016/j.compfluid.2017.03.022⟩. ⟨hal-01502389⟩
