Wind-tunnel research on the mechanics of plumes in the atmospheric surface layer. Part II. Wind-tunnel simulation of diffusion in an atmospheric surface layer with an elevated inversion : annual report
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Diffusion of neutrally buoyant plumes emitted at various heights within a convective boundary layer capped by an inversion was simulated in a meteorological wind tunnel. Measurements were made of mean and fluctuating velocities and temperatures and of the diffusing plumes. When presented in a dimensionless coordinate system based on the buoyant heat flux and the thickness of the convective layer, the data appear to be consistent with available data from field studies and water-tank simulations and exhibit a unique pattern of diffusion which is related to the nature of the thermals and the ...