## 1.7. Wall Condensation Model

The Wall Condensation Model has been developed for use in the nuclear containment industry, although it can be used in more general situations. In this model, the condensation of gaseous vapor in a variable composition mixture is driven by the concentration gradient at the wall, and internal boundary mass sources are used to model the removal of condensate from the system. The condensate film thickness, and heat transfer through it, are assumed to be negligible and are not modeled explicitly. This is appropriate for containment scenarios where the condensate does not adhere to the surface but is absorbed by it (for example, on ceramic/concrete walls).

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