ABSTRACT
In this paper CFD is used to describe the HAM transport between the indoor environment of a single zone building and its surrounding walls. In contrast with traditional methods the CFD approach takes the effect of distributions in the indoor air and in the walls into account and local convection coefficients are calculated. CFD modelling only results in accurate indoor vapour and temperature distributions in case the boundary conditions at the walls are correctly stated. These wall conditions depend on the heat and moisture buffering in the walls. Heat buffering can be taken into account, but no valid description is available in commercial CFD tools for moisture buffering. In this paper a model for moisture buffering in walls is added to the commercial CFD tool Fluent®. Using this model the effect of moisture buffering in walls can be taken into account in the CFD simulation of HAM transport.
