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Amélioration des modèles de quantification des émissions particulaires diffuses liées a l'érosion éolienne de tas de stockage de matières granulaires sur sites industriels

Abstract : Fugitive dust emissions from open stock yards for bulk materials represent a significant part of overall estimated atmospheric emission on industrial sites. The aim of the thesis work is to improve the accuracy of the current models of estimation of fugitive dust emissions, by defining more precisely the parameters which affect wind erosion as well on the material stored scale as on the industrial sites scale. Previous studies have shown that the presence of non-erodible roughness elements on erodible surfaces has the effect of absorbing part of the wind shear stress and thus protecting the erodible surface from wind erosion. Therefore, the friction velocity evolution has been studied as a function of the characteristics changes of the surface roughnesses during the erosion process. Besides, it is commonly known that the wind exposure of the stockpiles and subsequent emissions from these stockpiles depends on various parameters such as the geometry, the location of the pile, the site topography as well as the wind conditions. An experimental study in a wind tunnel and numerical simulations, characterizing the wind flow over the piles, have been carried out to study the effect of each of these parameters on dust emissions. These studies have provided further insight into the phenomena of wind erosion and have allowed a more accurate and relevant evaluation of fugitive dust emissions on industrial sites.
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  • HAL Id : tel-03004032, version 1

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Catherine Turpin. Amélioration des modèles de quantification des émissions particulaires diffuses liées a l'érosion éolienne de tas de stockage de matières granulaires sur sites industriels. Sciences de l'ingénieur [physics]. Université de Valenciennes et du Hainaut Cambraisis, 2010. Français. ⟨NNT : 2010VALE0010⟩. ⟨tel-03004032⟩

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