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Plume dispersion characteristics in the turbulent convective regime

DOI: 10.1615/ICHMT.2015.THMT-15.1480
pages 671-674

Shahin N. Oskouie
Department of Mechanical Engineering, University of Manitoba, Winnipeg, R3T 5V6, Canada

Zixuan Yang
Department of Engineering Mechanics, Tsinghua University; Department of Mechanical Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6, Canada

Bing-Chen Wang
Department of Mechanical & Manufacturing Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6, Canada

Eugene Yee
Defence Research & Development Canada − Suffield P.O. Box 4000, Medicine Hat, Alberta, T1A 8K6, Canada

Abstrakt

The dispersion of a passive plume released from a concentrated line source into a homogeneous isotropic turbulent flow is studied using direct numerical simulation. The focus of this study is on the turbulent convective regime of plume development. The characteristics of the plume in this regime of development are exhibited using the properties related to the growth of the mean plume width and the behavior of the concentration variance. Furthermore, the nature of the concentration fluctuations in this regime will be investigated in terms of the probability density function of concentration, the concentration power spectrum, and the balance of budget terms in the transport equation for the concentration variance.

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