A Lagrangian stochastic model for estimating the high order statistics of a fluctuating plume in the neutral boundary layer
We use a Lagrangian stochastic micromixing model to predict the concentration fluctuations of a continuous release in a neutral boundary layer. We present the computational algorithm that implements the interaction by exchange with the conditional mean model and we compare the numerical solutions with the experimental values in order to evaluate the reliability of the model. The influence of the source size on the concentration probability density function in the near and far-field is discussed and some shortcomings of the model are pointed out.
Keywords: atmospheric turbulence, concentration fluctuations, Lagrangian stochastic modelling, turbulent mixing