Negative buoyancy effects on the dispersion of continuous gas plumes downwind solid obstacles

摘要

An investigation of continuous dense gas plumes released from a surface area source and dispersing downwind solid obstacles is presented. comparison with passive plumes released in the same experimental conditions enables us to emphasize the buoyancy effects. Some quantitative statistical results such as mean concentration, root-mean-square fluctuations, skewness and kurtosis are given, The experimental technique used, visualizations and digital image processing, allows us to characterize the geometrical evolution of the plumes.