Experimental surface flow visualization and numerical investigation of flow structure around an oblong stockpile

摘要: Emission factors are largely used to quantify particle emissions from industrial open storage piles. These based on the knowledge of velocity distribution and flow patterns over stockpile surface which still requires further research. The aim present work is investigate airflow characteristics a single typical oblong pile in its near-ground surroundings for various wind directions. Wind tunnel experiments using an oil-film coating technique were carried out near-wall visualization. Numerical simulation results, favorably compared PIV measurements, allow comparison analysis features. For oriented 90° main direction, topology around wall-mounted obstacles observed, notably wake zone downstream including two counter-rotating vortices. Further numerical wall shear stress streamlines indicates that complex three-dimensional vortical structures develop pile. other incoming directions (30 60°), greatly differ as helical vortex develops pile’s crest. Corresponding high values noticed each configuration studied, downwash upwash zones induced by developed. This combined with areas friction levels may be linked potential dust emission ground surrounding stockpiles.