ISSN : 2288-9167(Print)
ISSN : 2288-923X(Online)
ISSN : 2288-923X(Online)
Journal of Odor and Indoor Environment Vol.14 No.2 pp.150-156
DOI : https://doi.org/10.15250/joie.2015.14.2.150
DOI : https://doi.org/10.15250/joie.2015.14.2.150
A study on the performance of a SST k-ω model for near field dispersion of odor from rooftop emissions
15 May 2015
15 June 2015
24 June 2015
Abstract
This paper presents the performance of a CFD model for the near field dispersion of odor from rooftop emissions.The FLUENT Shear-Stress Transport (SST hereinafter) k-ω turbulence model was used to simulate odor dispersionfrom a rooftop odor vent. The results were compared with a wind tunnel experiment and the calculated resultsof ASHRAE 2003 and 2007. The FLUENT SST k-ω turbulence model provided good results for makingreasonable predictions about the building rooftop surface normalized dilution. It was found that increasing the ventheight (from 1m to 7m) reduces rooftop surface normalized dilution. ASHRAE 2003 and ASHRAE 2007performance measures are generally not as good as FLUENT SST k-ω turbulence model performance measures,with larger MG (the geometric mean bias, VG (the geometric variance), NMSE (the normalized mean square error),FB (Fractional bias), and smaller FAC2 (the fraction of predictions within a factor of two of observations).
