Contaminant Air Propagation between Naturally Ventilated Scale Model Pig Buildings under Steady-state Conditions

It was found that the contaminated air reached the upwind building even if it was generated in the downwind building. When the contaminant was generated in the downward building, the concentration in the upwind building became 10−3 of the concentration of the contaminant source when the buildings were placed at a separation distance equal to the ridge height. However, it was diluted to a level of 10−5 when the separation building distance was three times of the ridge height. When the contaminant was generated in the upwind building, the contaminant concentrations in the downwind building were higher compared to the case of contaminant generated in the downwind building.