Publication Type : Journal Article
Publisher : Environmental Science and Pollution Research
Source : Environmental Science and Pollution Research, Springer, Volume 22, Number 21, p.16814–16829 (2015)
Url : http://link.springer.com/article/10.1007/s11356-015-4877-9
Keywords : Atmospheric temperature gradient, Buoyant plumes, Froude number, Multi-flue stack, Plume dispersion
Campus : Coimbatore
School : School of Engineering
Department : Mechanical Engineering
Year : 2015
Abstract : Air pollution is one of the major global hazards and industries have been one of its major contributors. This paper primarily focuses on analyzing the dispersion characteristics of buoyant plumes of the pollutant released from a multi-flue vertical stack into a variable temperature gradient atmosphere (α) in a constant-velocity cross wind using two stack configurations—inline and parallel. The study is conducted for different Froude numbers, Fr = 12.64, 9.55, and 8.27. The atmospheric temperature gradients considered for the study are 0, +1, +1.5, and +2 K/100 m. The numerical study is done using the commercial computational fluid dynamics (CFD) code FLUENT. The effects of stack configuration, α, and Fr on the plume characteristics are presented. It is observed that the plume rises higher and disperses over a larger area with the inline configuration due to better mixing and shielding effect. With higher α, it is seen that the plume rises initially and then descends due to variation of the buoyant force. The plume rise initially is strongly influenced by the momentum of the jet, and as it moves downstream, it is influenced by the cooling rate of the plume. Furthermore, the plume rises higher and disperses over a larger area with a decrease in Fr.
Cite this Research Publication : Dr. Ratna Kishore V., Vivek Mugundhan, Goutham, K., Sreekanth, G. R., Dharmarajan, S., and Goel, M., “Numerical study of a buoyant plume from a multi-flue stack into a variable temperature gradient atmosphere”, Environmental Science and Pollution Research, vol. 22, pp. 16814–16829, 2015.