Studies on air-distribution in a livestock housing through numerical analysis (Part 1) -- analysis of air-flow characteristics in rooms equipped with different ventilation systems --

摘要

Air-distribution characteristics was discussed within a windowless type weanling piggery by using three dimensional, isothermal, turbulent kappa - epsilon models introducing the term "volume porosity" and "surface permeability" which virtually presented the distributed solids such as porous ceiling and slotted floor in the piggery. The simulated results were compared with the observed data in the real weanling piggery, and then by using the simulation technique, air distribution in two pig raising rooms, having different ventilation systems such as negative and positive pressure, was compared from each other.