Author(s)

B. Furieri, S. Russeil, J.-L. Harion, J. Santos & M. Milliez

Abstract

The estimation of dust emission of fugitive sources, suchas storage piles of granular materials on industrial sites, is often carried out by implementing mathematical models. The widely used USEPA model employs emission factors which require a detailed knowledge of the fluid flow. The present work is focused on the investigation of global emissions from oblong stockpiles. Previous studies dealt with dust emissions quantification and fluid flow analysis concerning isolated oblong piles. Later work indicated the importance of emissions originating from the ground region surrounding piles whose contribution can be up to twice that coming from the pile. In this framework the stockpile oriented 60◦ to the main wind flow direction has presented the most elevated global dust emission rate. This paper aims to analyse the influence of a second successive pile on global dust emissions on industrial sites, on which there is rarely a single isolated pile. Dust emission rates are assessed by the USEPA model and fluid flow data is predicted by numerical simulations carried out with the open-sourceCFD code Code Saturne. The distance between piles is also a parameter analysed in these investigations. The following configurations have been carried out: (i) one isolated stockpile and (ii) two parallel stockpiles with the same orientation and two different values of gap between them. The investigation of the two successive nearby stockpiles indicates that dust emission from the upstream stockpile is slightly increased when the piles are more distant. On the contrary, the analysis of the downstream stockpile shows that, as the distance increases, dust emission will be decreased. It is also found that the isolated stockpile emits less dust than the upstream or

Keywords

dust emission quantification, USEPA model, CFD, Code_Saturne