Experimental surface flow visualization and numerical investigation of flow structure around an oblong stockpile - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Environmental Fluid Mechanics Année : 2012

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

Résumé

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

Dates et versions

hal-02539087 , version 1 (09-04-2020)

Identifiants

Citer

B. Furieri, S. Russeil, J.-L. Harion, Catherine Turpin, J. Santos. Experimental surface flow visualization and numerical investigation of flow structure around an oblong stockpile. Environmental Fluid Mechanics, 2012, 12 (6), pp.533-553. ⟨10.1007/s10652-012-9249-0⟩. ⟨hal-02539087⟩
30 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More