Numerical simulation of air flows in a full-scale ventilated room using different turbulence models

J. B. Jiang, X. Wang, Y. Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Two-dimensional isothermal airflows in a ventilated room were numerically investigated by applying different turbulence models that range from zero- equation model to Reynolds Stress Transport models. Quantitative and qualitative comparisons were made between the numerical results and corresponding experimental data from Particle Image Velocimetry (PIV) and Hot-Wire Velocimetry (HWV). Comparisons showed that the airflow patterns predicted by zero, one-equation and k-ε models were similar to those observed in hotwire measurement while airflow patterns predicted by RSM, k-ω and k-ω-SST were similar to PIV measurements. Mean velocities predicted by all models agreed better with experimental data in the left part than in the right part of the room. But in the right part of room, there also existed big differences between the mean velocities from PIV and those from HWV. As to turbulent kinetic energy, predictions of RSM, k-ω and k-ω-SST models were more close to HWV measurements than all the k-ε models tested. However, discrepancy between predictions and measurements still existed especially in the right part of the room. The differences between predictions and measurements were discussed and possible reasons were pointed out: low Reynolds number effects could have caused the differences.

Original languageEnglish (US)
Title of host publicationLivestock Environment VII - Proceedings of the Seventh International Symposium
EditorsM.J. Briggs, M.E. McCormick
Pages35-44
Number of pages10
StatePublished - 2005
Externally publishedYes
EventLivestock Environment VII - 7th International Symposium - Baltimore, MD, United States
Duration: Oct 20 2004Oct 22 2004

Publication series

NameLivestock Environment VII - Proceedings of the Seventh International Symposium

Other

OtherLivestock Environment VII - 7th International Symposium
CountryUnited States
CityBaltimore, MD
Period10/20/0410/22/04

Keywords

  • Air flow
  • K-ε models
  • K-ω-SST model
  • Reynolds Stress Transport model
  • Turbulence models

ASJC Scopus subject areas

  • Engineering(all)

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