Two dimensional air exfiltration and heat transfer through fiberglass insulation II. Comparisons between simulations and experiments.

The two-dimensional, transient numerical model of heat and water vapor convection and diffusion during air exfiltration within fiberglass insulation, presented in Part /, is validated in Part II, with experimental data for temperature, moisture and frost accumulation, and heat flux. With a few exceptions, the simulation results and experimental data agree within the experimental uncertainty. Exfiltration airflow in the two-dimensional space showed strong entrance and exit effects for temperature, moisture and frost accumulation, and heat flux on the cold side. Between the entrance and exit, the temperature, mass accumulation, and heat flux showed characteristics similar to a boundary layer.