A model for simulating atmospheric dispersion in low-wind conditions
by S. Okamoto, H. Ohnishi, T. Yamada, T. Mikami, S. Momose, H. Shinji, T. Itohiya
International Journal of Environment and Pollution (IJEP), Vol. 16, No. 1/2/3/4/5/6, 2001

Abstract: A practical model for low-wind conditions was derived by integration of an instantaneous three-dimensional Gaussian puff equation, in which wind speed was assumed to be zero and standard deviations of a smoke (σ_y and σ_z) were expressed as a linear function of the dispersion time. When the plume spreads σ_y and σ_z were assumed to be linear functions of dispersion time, the proportionality coefficients for σ_y and σ_z) derived from the air tracer experiments were about 0.30-0.40 and 0.09-0.18 m/s, respectively.

Online publication date: Mon, 07-Jul-2003

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