Condensation UDF theory: Film condensation in the presence of noncondensable gases。
the UDF is based contains several assumptions:
1. Vapor phase contains a binary ideal gas mixture of air and water vapor
2. The liquid phase consists of only water
3. Local thermodynamic equilibrium exists at the liquid-vapor interface
4. Film condensation only is considered. Dropwise condensation does not take place
5. The thermal resistance of the liquid film is neglected.