CFD simulation of turbulent fluid flow and dust dispersion in the 1 m3 explosion vessel equipped with the rebound nozzle. (May 2022)

• Record Type: Journal Article
• Authors: Portarapillo, Maria; Trofa, Marco; Sanchirico, Roberto; Di Benedetto, Almerinda
• Is Part Of: Journal of loss prevention in the process industries. Volume 76(2022)
• Publication Date: 2022-05
• Subjects: CFD simulation -- Dust dispersion -- Rebound nozzle -- Perforated annular nozzle -- 1 m3 vessel; Chemical industries -- Safety measures -- Periodicals; 660.2804
• DOI: 10.1016/j.jlp.2022.104755
• Languages: English
• ISSNs: 0950-4230

Abstract

Abstract: Against dust explosions, all the flammability and explosibility parameters must be evaluated following standard procedures using the 20 L and/or the 1 m 3 vessel. Previous results comparing the dust dispersion in the 20 L sphere equipped with rebound or perforated annular nozzle showed that the initial turbulence level, the dust concentration, and the feeding are affected by the type of nozzle used. In this work, a similar investigation was performed on the 1 m 3 vessel, simulating the fluid flow evolution which is obtained with the rebound nozzle. Results showed that the 1 m 3 vessel equipped with rebound nozzle presents a less uniform degree of turbulence and a higher amount of dust fed, compared to the case of perforated annular nozzle. However, the greatest effect on the initial level of turbulence and turbulent combustion regime is determined by the size of the vessel and not by the type of nozzle used. Graphical abstract: Image 1 Highlights: CFD simulation of dust dispersion in 1 m 3 vessel equipped with rebound nozzle. Comparison between perforated annular and rebound nozzles. Effect of nozzle and geometry on the established turbulent combustion regime.