W1D is a wellbore simulator developed as part of the
GEOTREF (GEOThermal energy in Fractured REservoirs)
project. A coupled system of equations ensuring mass, momentum
and heat balance with appropriate set of models and correlations
is resolved to describe multi-component and multi-phase
flow along the well axis. The simulator is designed to be effective
as a practical tool in the monitoring of geothermal systems.
In the present work, the code is used to carry out physical
investigations on the water boiling occurring alongside the
degassing of a non-condensable gas, the carbon dioxide (CO2).
For high Reynolds flows in geothermal wellbores, it is illustrated
that a thermodynamical approach with appropriate assumptions
is able to accurately capture the effect of local physical mechanisms
(such as the interfacial mass transfer resistance) on the
global dynamic (partitioning of CO2 in liquid and gas phases).
Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 .