Author(s)

A. Butet

Abstract

Using PLIF to analyse water channel simulations of turbulent diffusion in the atmospheric boundary layer A. Butet METEO-FRANCE CNRM/GMEI/SPEA, 42 Av. Coriolis, 31057 Toulouse Cedex, France 1 Introduction The physical simulation of the atmospheric boundary layer with a water channel is used to study air pollution. The diffusion depends on the wind velocity, the atmospheric stability and the roughness of the soil. The experimental simulations carried out at Meteo-France by creating the atmospheric boundary layer at a laboratory scale allows the study of the pollutant diffusion released in stable and refounded conditions. The flow visualizations with a laser sheet permit the total view of the phenomena and these characteristic scales. In diffusion, it is very important to measure instantaneous concentration inside the plume in order to calculate the mean and extrema fields. A new technical method based on the PLIF and image processing provides an unintrusive

Keywords