Mechanisms of natural ventilation in livestock buildings: Perspectives on past achievements and future challenges

摘要: Studies on the mechanisms of natural ventilation in livestock buildings are reviewed and influences discharge pressure coefficients discussed. Compared to studies conducted for human occupation industrial which focus thermal comfort, systems, indoor air quality, building physics energy etc., our understanding involved still limited application orifice equation. It has been observed that assumptions made equation not valid wind-induced cross through large openings. This review identifies power balance model, concept stream tube local dynamic similarity model helped fundamental buildings. These concepts have distinguished flow openings from ‘cracks’ (i.e. small openings), is where normally used prediction airflow rate. More field measurements effect wind turbulence rate need be encouraged, particularly under conditions mean differences much lower than fluctuations differences. Research bidirectional occurs at also limited.