Natural convection through openings and its application to cattle building ventilation

Abstract It is clear from historical and contemporary records that the ventilation of cattle buildings by natural convection is not well understood. The importance is however widely recognized. A theory for natural convection through openings is developed and application is demonstrated to openings with geometries relevant to buildings. The effect of superimposed forced convection is shown and a previous theory is refuted. The proposed theory is in good agreement with data measured at doorways. Design procedures are given for open-ridge and slotted-roof systems of ventilation for cattle buildings.