CFD modelling and validation of wall condensation in the presence of non-condensable gases

• A wall condensation model was implemented and validated in ANSYS CFX.
• Condensation rate is assumed to be controlled by the concentration boundary layer.
• Validation was done using two laboratory scale experiments.
• CFD calculations show good agreement with experimental data.

The aim of this paper is to present and validate a mathematical model implemented in ANSYS CFD for the simulation of wall condensation in the presence of non-condensable substances. The model employs a mass sink at isothermal walls or conjugate heat transfer (CHT) domain interfaces where condensation takes place. The model was validated using the data reported by Ambrosini et al. (2008) and Kuhn et al. (1997).