MODELING OF EVAPORATION PROCESSES UNDER THE GROUND

Abstract

The vaporization process is modeled by incorporating the relation between pressure and enthalpy
into the numerical simulation code for the coupled thermal, hydraulic and mechanical phenomena under the
ground. The boundary between superheated steam and two-phase of steam and water was modeled by the
previous study. On the other hand, the boundary between compressed water and two-phase of steam and liquid is
modeled by the deduced equation with pressure and enthalpy in this study. Temperature is selected to be the
unknown variable in the model. The enthalpy is estimated from the pressure and temperature, and then the
situation of phase is examined. As an example, the situation about the disposal of the waste generating heat to
300˚C is simulated by the simple 2-D and detail 1-D models.