A localisation of solidification interface in interaction with unsteady melt

The interaction between unsteady thermal convection and a solid/melt front is studied numerically This concerns crystal growth applications using the vertical Bridgman technique. The physical domain contains a liquid phase, a solid phase and a small intermediate phase modelled as a porous medium. An enthalpy-porosity homogeneous formulation is proposed with a finite volume approximation. The interface localisation method gives the significant cha nges of the interface over time due to oscillatory melt in inverted configu ration. It is qualified with respect to the results obtained with a front t racking method for various values of the Rayleigh number: (C) Academie des sciences/Elsevier; Paris.