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Computational modelling and scale model validation of airflow patterns in naturally ventilated barns

Merlijn De Paepe (UGent) , Peter Demeyer, Jan Pieters (UGent) , Wim Cornelis (UGent) , Donald Gabriëls (UGent) and Bart Merci (UGent)
(2013) Acta Horticulturae. 1008. p.171-176
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Abstract
The application of natural ventilation in livestock farming still requires better understanding. Key issues are the configuration and dimensions of the ventilation openings throughout the barn. In this paper we tested the effect of six different ventilation opening configurations upon indoor air velocities, by means of Computational Fluid Dynamics (CFD). The 2D CFD results were verified with data from scale model experiments in a wind tunnel. Generally, both methods showed good agreement and indicated that larger ventilation openings resulted in lower air velocities near the inlet opening, but higher velocities at the outlet. Comparison with wind tunnel experiments also showed there is still room for improvement in the used CFD models. The obvious limitations of a 2D approach can be part of the explanation. Nevertheless, the main advantage of the computational approach was the ability to visualize the indoor airflows in each of the six geometries. Further research will involve 3D modelling.
Keywords
CFD, animal housing, ventilation openings, wind tunnel, air velocity, FLUID-DYNAMICS

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Chicago
De Paepe, Merlijn, Peter Demeyer, Jan Pieters, Wim Cornelis, Donald Gabriëls, and Bart Merci. 2013. “Computational Modelling and Scale Model Validation of Airflow Patterns in Naturally Ventilated Barns.” In Acta Horticulturae, ed. F Juste, R Suay, T Banhazi, I-B Lee, and M Kacira, 1008:171–176. Leuven, Belgium: International Society for Horticultural Science (ISHS).
APA
De Paepe, Merlijn, Demeyer, P., Pieters, J., Cornelis, W., Gabriëls, D., & Merci, B. (2013). Computational modelling and scale model validation of airflow patterns in naturally ventilated barns. In F. Juste, R. Suay, T. Banhazi, I.-B. Lee, & M. Kacira (Eds.), Acta Horticulturae (Vol. 1008, pp. 171–176). Presented at the 1st International symposium on CFD Applications in Agriculture, Leuven, Belgium: International Society for Horticultural Science (ISHS).
Vancouver
1.
De Paepe M, Demeyer P, Pieters J, Cornelis W, Gabriëls D, Merci B. Computational modelling and scale model validation of airflow patterns in naturally ventilated barns. In: Juste F, Suay R, Banhazi T, Lee I-B, Kacira M, editors. Acta Horticulturae. Leuven, Belgium: International Society for Horticultural Science (ISHS); 2013. p. 171–6.
MLA
De Paepe, Merlijn, Peter Demeyer, Jan Pieters, et al. “Computational Modelling and Scale Model Validation of Airflow Patterns in Naturally Ventilated Barns.” Acta Horticulturae. Ed. F Juste et al. Vol. 1008. Leuven, Belgium: International Society for Horticultural Science (ISHS), 2013. 171–176. Print.
@inproceedings{4210946,
  abstract     = {The application of natural ventilation in livestock farming still requires better understanding. Key issues are the configuration and dimensions of the ventilation openings throughout the barn. In this paper we tested the effect of six different ventilation opening configurations upon indoor air velocities, by means of Computational Fluid Dynamics (CFD). The 2D CFD results were verified with data from scale model experiments in a wind tunnel. Generally, both methods showed good agreement and indicated that larger ventilation openings resulted in lower air velocities near the inlet opening, but higher velocities at the outlet. Comparison with wind tunnel experiments also showed there is still room for improvement in the used CFD models. The obvious limitations of a 2D approach can be part of the explanation. Nevertheless, the main advantage of the computational approach was the ability to visualize the indoor airflows in each of the six geometries. Further research will involve 3D modelling.},
  author       = {De Paepe, Merlijn and Demeyer, Peter and Pieters, Jan and Cornelis, Wim and Gabri{\"e}ls, Donald and Merci, Bart},
  booktitle    = {Acta Horticulturae},
  editor       = {Juste, F and Suay, R and Banhazi, T and Lee, I-B and Kacira, M},
  isbn         = {9789066056763},
  issn         = {0567-7572},
  keyword      = {CFD,animal housing,ventilation openings,wind tunnel,air velocity,FLUID-DYNAMICS},
  language     = {eng},
  location     = {Valencia, Spain},
  pages        = {171--176},
  publisher    = {International Society for Horticultural Science (ISHS)},
  title        = {Computational modelling and scale model validation of airflow patterns in naturally ventilated barns},
  url          = {http://www.actahort.org/books/1008/1008\_22.htm},
  volume       = {1008},
  year         = {2013},
}

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