Open Access
ARTICLE
The Turbulent Schmidt Number for Transient Contaminant Dispersion in a Large Ventilated Room Using a Realizable k-ε Model
Fei Wang, Qinpeng Meng, Jinchi Zhao, Xin Wang, Yuhong Liu, Qianru Zhang*
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, China
* Corresponding Author: Qianru Zhang. Email:
Fluid Dynamics & Materials Processing 2024, 20(4), 829-846. https://doi.org/10.32604/fdmp.2023.026917
Received 02 October 2022; Accepted 20 October 2023; Issue published 28 March 2024
Abstract
Buildings with large open spaces in which chemicals are handled are often exposed to the risk of explosions. Computational fluid dynamics is a useful and convenient way to investigate contaminant dispersion in such large spaces. The turbulent Schmidt number (
Sct) concept has typically been used in this regard, and most studies have adopted a default value. We studied the concentration distribution for sulfur hexafluoride (SF
6) assuming different emission rates and considering the effect of
Sct. Then we examined the same problem for a light gas by assuming hydrogen gas (H
2) as the contaminant. When SF
6 was considered as the contaminant gas, a variation in the emission rate completely changed the concentration distribution. When the emission rate was low, the gravitational effect did not take place. For both low and high emission rates, an increase in
Sct accelerated the transport rate of SF
6. In contrast, for H
2 as the contaminant gas, a larger
Sct could induce a decrease in the H
2 transport rate.
Keywords
Cite This Article
Wang, F., Meng, Q., Zhao, J., Wang, X., Liu, Y. et al. (2024). The Turbulent Schmidt Number for Transient Contaminant Dispersion in a Large Ventilated Room Using a Realizable k-
ε Model.
FDMP-Fluid Dynamics & Materials Processing, 20(4), 829–846. https://doi.org/10.32604/fdmp.2023.026917