Abstract
The vertical diffusion of a passive tracer released from a source in an unstable stratified boundary layer is studied by comparing an analytical model and experiments. The analytical solution is obtained by assuming power-law profiles for the mean velocity and vertical eddy diffusivity coefficients in the advection-diffusion equation. The analytical solution obtained leads to a non-Gaussian distribution for the vertical distribution of the concentrations at the plume centerline. The analytical model is compared with data collected from nine experiments conducted at Inshas, Cairo (Egypt). The model shows a good agreement between observed and calculated concentrations.
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