Experimental and CFD-DEM study of the dispersion and combustion of wheat starch and carbon-black particles during the standard 20L sphere test

Serrano, José Serna; Pico, Paula; Amín, Mariangel; Pinilla, Andrés; Torrado, David; Murillo, Carlos A.; Bardin‐Monnier, Nathalie; Ratkovich, Nicolás Ríos; Muñoz, Felipe; Dufaud, Olivier

doi:10.1016/j.jlp.2019.103995

Cited by 13 publications

(5 citation statements)

References 34 publications

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“…Although there is no consensus yet on the main mechanism responsible for particle fragmentation in the 20L sphere, particle fragmentation can occur due to a combination of the following mechanisms: (1) mechanical shear caused by the dispersion nozzle [138], (2) action of the outlet valve [135], and (3) the baroclininc effect [139]. Moreover, recent studies suggest that there are other factors that may also play a role on the degree of particle break-up, e.g., the type of nozzle [140], hardness and fracture toughness of the sample [141], and dust concentration [142].…”

Section: Validation Of the Pressure-time Curvementioning

confidence: 99%

Computational assessment of biomass dust explosions in the 20L sphere

Islas

Fernández

Betegón

et al. 2022

Process Safety and Environmental Protection

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Section: Validation Of the Pressure-time Curvementioning

confidence: 99%

Computational assessment of biomass dust explosions in the 20L sphere

Islas

Fernández

Betegón

et al. 2022

Process Safety and Environmental Protection

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“…The continuous phase itself is affected by the dispersed phase, as particles occupy volume, and can exchange momentum, heat, and mass with the continuous phase. 22,[32][33][34] The strength of the interactions depends on the size, density, and number of dispersed particles.…”

Section: Discrete Phase Modelmentioning

confidence: 99%

Numerical simulation of ultra-fine powder extinguishing agent injection process

Zhou

Shi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The process of pressurized injection of ultra-fine powder extinguishing agents (UPEA) and the effect of injection from the nozzle directly affects the spatial dispersion characteristics and the effectiveness of fire extinguishing. Combining CFD simulations and experimental measurements, the UPEA pressurized injection process and injection effects were investigated. The transient process of injection is divided into three stages, initial injection stage, steady injection stage, and post-injection stage. The post-injection stage is divided into a slow decay process and a residual gas release process. Investigating the effect of different filling conditions on the effectiveness of particle injection. In the stable injection stage, the higher the filling ratio, the lower the mass flow of UPEA particles at the same filling pressure. At the same filling ratio, the higher the filling pressure, the higher the mass flow of UPEA particles. The maximum mass flow of the UPEA particles was 5.38 kg/s at a filling ratio of 20% and a filling pressure of 3.6 MPa. The steady injection time is mainly influenced by the particle filling ratio.

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“…Sundaram et al [24] developed a theory of ignition and combustion of nm and μm aluminium particles. Serrano et al [25] carried out experiments in a closed 20-l vessel, as well as a computational CFD-DEM analysis, of the dispersion and combustion of clouds in air of wheat starch and carbon black powders.…”

Section: Modelling Of Dust Flame Propagation In Process Environmentsmentioning

confidence: 99%

Industrial Dust Explosions. A Brief Review

Eckhoff

2021

Applied Sciences

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This paper first addresses the question: what is a dust explosion? Afterwards, some specific issues are briefly reviewed: materials that can give dust explosions, factors influencing ignitability and explosibility of dust clouds, the combustion of dust clouds in air, ignition sources that can initiate dust explosions, primary and secondary dust explosions, dust flash fires, explosions of “hybrid mixtures”, and detonation of dust clouds. Subsequently, measures for dust explosion prevention and mitigation are reviewed. The next section presents the case history of an industrial dust explosion catastrophe in China in 2014. In the final section, a brief review is given of some current research issues that are related to the prevention and mitigation of dust explosions. There is a constant need for further research and development in all the areas elucidated in the paper.

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Experimental and CFD-DEM study of the dispersion and combustion of wheat starch and carbon-black particles during the standard 20L sphere test

Cited by 13 publications

References 34 publications

Computational assessment of biomass dust explosions in the 20L sphere

Computational assessment of biomass dust explosions in the 20L sphere

Numerical simulation of ultra-fine powder extinguishing agent injection process

Industrial Dust Explosions. A Brief Review

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