Assessment using CFD of the wind direction on the air discharges caused by natural ventilation of a poultry house

Fernando Rojano, Pierre Emmanuel Bournet, Melynda Hassouna, Paul Robin, Murat Kacira, Christopher Y. Choi

Research output: Contribution to journalArticle

3 Scopus citations


Air inside poultry houses must be removed on a regular basis to prevent excess of heat, particles and noxious gases that can imperil animals. To cope with this issue, natural ventilation could be an effective method when assisted by accurate predictions. This study investigates air discharges caused by natural ventilation of a poultry house by means of a three-dimensional computational fluid dynamics (CFD) model. It solves the governing equations of momentum, heat and mass transport, radiative transfers and animal-generated heat. Wind directions of 0°, 36° and 56° (0° corresponds to a wind blowing perpendicular to the ridgeline) were investigated; the CFD model predictions achieved a RMSE of 1.2 °C and 0.6 g[H2O] kg−1 [dry air] for internal temperature and absolute humidity, respectively, when air blew with an angle of 36°. Air renewal rates (ARR) were 39.5 (± 1.9), 34.9 (± 2.2) and 33.6 (± 1.7) volumes of the building per hour, when air blew at 0°, 36° and 56°, respectively. Such ARR predictions served to know how the gases contained in air would likely spread downstream from the building in order to define regions of potentially high gas concentration that could endanger neighbouring habitable facilities.

Original languageEnglish (US)
Article number724
JournalEnvironmental Monitoring and Assessment
Issue number12
StatePublished - Dec 1 2018



  • Animal housing
  • Gas dispersion
  • Humidity
  • Plume shape
  • Ventilation rate

ASJC Scopus subject areas

  • Environmental Science(all)
  • Pollution
  • Management, Monitoring, Policy and Law

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