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Boundary –Layer Parameterization for Dispersion Applications |
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PP: 15-26 |
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Author(s) |
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Khaled S. M. Essa,
H. M. Taha,
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Abstract |
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| The first paper explains the causes and mechanisms of turbulence, as well as variances and intensities of turbulence, covariance and turbulent fluxes, gradient-transport theories, the mixing length hypothesis, the eddy diffusivities hypothesis, the Monin-Obukhov similarity theory and its values in unstable conditions, the local free-convection similarity theory, the mixed-layer and planetary boundary layer (PBL) similarity theory, boundary-layer parameterization for dispersion applications, the estimation of surface stress and heat flux, the mixing height on the PBL depth, mean wind profile, and wind speed values in unstable conditions The three-dimensional advection equation is then solved step-by-step utilizing the power law of the vertical height. The levels of Iodine-135 that were observed and those that were anticipated are then compared using information from the Egyptian Atomic Energy Authority. Under unstable situations, the proposed model and the Gaussian model agreed on the measured concentration values of I135 within a factor of two. Compared to Gaussian concentrations, the recommended concentrations under unstable circumstances are substantially closer to the reported I135 concentration values. |
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