Modelling of dust emissions induced by flow over stockpiles and through packed beds--颗粒学报PARTICUOLOGY

Schulz, D., Schwindt, N., Schmidt, E., & Kruggel-Emden, H. (2021). Modelling of dust emissions induced by flow over stockpiles and through packed beds. Particuology, 59, 55-63. https://doi.org/10.1016/j.partic.2020.10.014

Modelling of dust emissions induced by flow over stockpiles and through packed beds

Daniel Schulz ^a *, Nadja Schwindt ^b, Eberhard Schmidt ^b, Harald Kruggel-Emden ^a

a Technische Universität Berlin, Chair of Mechanical Process Engineering and Solids Processing, Ernst-Reuter-Platz 1, D-10587 Berlin, Germany
b University of Wuppertal, Institute of Particle Technology, Rainer-Gruenter-Str, Geb. FF, D-42119 Wuppertal, Germany

10.1016/j.partic.2020.10.014

Volume 59, December 2021, Pages 55-63

Received 27 March 2020, Revised 24 July 2020, Accepted 2 October 2020, Available online 9 December 2020, Version of Record 13 October 2021.

E-mail: daniel.schulz@tu-berlin.de

Highlights

• Integration of a dust source term in a DEM-CFD multiphase framework.

• Prediction of dust emissions from bulk material during particle–fluid interaction.

• Application: Modelling dust release from stockpiles and packed beds.

• Deriving of dust release correlations in a wide parameter study.

Abstract

Dust emissions during storage of non-moving bulk materials are studied with a numerical method. The model relies on a contact-model-free Discrete Element Method (DEM) to model the bulk particle–fluid interaction and the dust removal coupled with Computational Fluid Dynamics (CFD) to model the gas and the dust phase in a multiphase framework. Here, two storage scenarios are considered: a flown through packed bed and a flown over stockpile. For the first, the performed simulations reveal that the dust discharge can be correlated with the passing fluid pressure drop. For the second, a parameter study of factors influencing the dust emissions is performed. The parameters discussed are the stockpile size, the gas velocity, the slope angle, the particle diameter and the shape of the stockpile, taking into account conical and truncated conical stockpiles. Dust release correlations are obtained for both scenarios, which reflect very well the obtained numerical results.

Graphical abstract

Keywords

Computational Fluid Dynamics (CFD); Discrete Element Method (DEM); Dust release correlations; Stockpile emissions; Packed bed emissions

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