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Abstract
This thesis aims to study the dispersion of air pollutants from a stack into atmosphere.
The primary purpose of this study is to predict the plume behavior for gases emitting from the stack. In turn. the recommended minimum downwind distance, height and width for the residential areas around an industrial stack. The obtained results are represented graphically in line, and contour charts. The present mathematical models are namely K-8 model and Large Eddy Simulation Model. The present models are used for a variety of physical processes, and pollutants and applied on single stack and multi stacks The present models can be applied at different locations and times (for Large Eddy Simulation only) in all flat or simple terrain (Rural and Urban). It will be useful in feasibility and planning studies of the new factories, especially in the new Egyptian cities.