Analysis of dust distribution in silo during axial filling using computational fluid dynamics: Assessment on dust explosion likelihood |
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| Institution: | 1. Istituto di Ricerche sulla Combustione, Consiglio Nazionale delle Ricerche (IRC-CNR), Piazzale Tecchio 80, 80125 Napoli, Italy;2. Dipartimento di Ingegneria Chimica Materiali Ambiente, Sapienza Università di Roma, Via Eudossiana, 18, 00184 Roma, Italy;3. Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi Federico II, Piazzale Tecchio 80, 80125 Napoli, Italy;1. Reaction and Chemical Engineering Laboratory (LRGP), University of Lorraine, UMR 7274 CNRS, 1, rue Grandville, BP 20451, 54 001 Nancy, France;2. Chemical Engineering Department, Universidad de Los Andes, Colombia, Carrera 1 Este 19 A 40, Bogotá, Colombia |
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| Abstract: | In this study, the dust distribution in a silo during axial filling was modelled using a commercial computational fluid dynamics (CFD) code. The work focused on the dust concentration distribution in the silo, for evaluating the likelihood of a dust explosion in the silo. The simulation was conducted using a combination of renormalized (RNG) k-epsilon and discrete phase models, with standard pressure interpolation and a second order upwind scheme. The predicted dust concentration distribution showed a good agreement with experimental data adopted from the literature. It was found that the dust concentration distribution was influenced by mean velocity and turbulence flow. The simulation results suggest that the cornstarch concentration inside the silo was always above the lower explosion limit (LEL), hence requiring a mitigating action or a control system to reduce the explosion risk. |
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| Keywords: | CFD Dust explosion Dust concentration Gas–solid flow Silo |
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