On the theory of the passive impurity distribution in the turbulent air flow
Journal: Journal of Advances in Physics (Vol.11, No. 7)Publication Date: 2016-06-17
Authors : George Vakhtang Jandieri;
Page : 3535-3545
Keywords : Passive impurity; turbulent atmosphere; diffusion; correlation function;
Abstract
The statistical model of passive impurity transfer in surface boundary layers of the turbulent atmosphere in the presence of wind is offered. Analytical expressions of the normalized concentration of impurity for arbitrary correlation tensor of the second rank of velocity pulsation when the emission source is located at a certain height over the Earth's surface are obtained. The effective coefficient of turbulent diffusion contains coefficient of molecular diffusion, longitudinal and transverse turbulent diffusion coefficients. Numerical calculations were carried out using experimental data of ground(-based) observations. The isolines describing distribution of the passive impurities at calm case are depicted at different values of a wind speed and at certain distances from a source. Dynamics of globules formation with various concentration of impurity transferred by wind is constructed. They have specific characteristic spatial scales and lifetimes.
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