Application of hysteresis in FEM modeling of vapor-liquid phase transitions

In this paper a new, phenomenological, temperature dependent hysteresis model of the vapor-liquid first-order phase transitions is introduced. For the modeling of the vapor-liquid phase transition a versatile ODE-based hysteresis model is implemented under the assumption of a local non-equilibrium condition that enables a certain level of supersaturation without phase change. The proposed modeling approach improves the existing equation-of-state type diffuse interface methods involved in homogeneous two phase flow models.