Dust explosions: CFD modeling as a tool to characterize the relevant parameters of the dust dispersion

Murillo, Carlos A.; Dufaud, Olivier; Bardin‐Monnier, Nathalie; López, Omar D.; Muñoz, Felipe; Praly, Laurent

doi:10.1016/j.ces.2013.07.029

Cited by 58 publications

(10 citation statements)

References 25 publications

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“…It appears then clearly that following the test procedures imposed by the standards is not sufficient to determine the operating parameters representing the most favorable conditions, i.e., the most conservative or relevant with regard to the industrial context. As a consequence, it seems that CFD simulations can become a useful tool for the development of dust explosion tests …”

Section: Methodsmentioning

confidence: 99%

CFD as an approach to understand flammable dust 20 L standard test: Effect of the ignition time on the fluid flow

et al. 2017

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in Wiley Online Library (wileyonlinelibrary.com)A computational study based on the Euler-Lagrange approach was developed for the characterization of flammable dusts in the 20 L sphere standard test. The aim of the study was to analyze some parameters that might affect the experimental data (e.g., cold turbulence and particle size). The turbulence of a wheat starch cloud was described with the Detached Eddy Simulation model. Both the pressure of the system and the RMS velocity were compared with the flow patterns established with a particle image velocimetry analysis. It was concluded that the rebound nozzle forms a cloud that is composed by clumps. This fact implies dissimilarities between the local concentrations and the nominal value. Finally, a granulometric analysis established that the mean diameter of the particle size distribution (PSD) decreased by 69% during the dispersion. Thus, it is suggested to consider the PSD at the ignition zone rather than the PSD of the sample. V C 2017 American Institute of Chemical Engineers AIChE J, 64: 42-54, 2018

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Section: Methodsmentioning

confidence: 99%

CFD as an approach to understand flammable dust 20 L standard test: Effect of the ignition time on the fluid flow

et al. 2017

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“…Tests have been performed according to IEC standard 1241-2-3 (IEC, 1994). The delay between the beginning of the dust dispersion and the spark, called tv, is related to the initial turbulence in the dust cloud (Murillo et al, 2013). It has been varied from 60 ms (high turbulence degree) to 180 ms (low turbulence degree).…”

Section: Mie Range Classificationmentioning

confidence: 99%

Combining product engineering and inherent safety to improve the powder impregnation process

Groos-Gerardin

Praly

Falk

et al. 2015

Journal of Loss Prevention in the Process Industries

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“…Thus, in the present paper, the dust dispersion process is considered and studied by means of the standardized 20L sphere (equipped with the rebound nozzle and proceeding according to the ASTM E1226 standard [8]). In contrast with previous CFD studies on the 20-L vessel turbulent dispersion, conducted using commercial codes (ANSYS Fluent® [27,[35][36][37] or STAR-CCM+® [32,38]), this work relies on the use of Open-FOAM (Open-source Field Operation And Manipulation) [39], a CFD open-source C++ library that has gained wide recognition in academic, research and industrial sectors [40,41]. Results obtained with OpenFOAM are compared with both experimental and CFD predictions available in the literature.…”

Section: Introductionmentioning

confidence: 99%

CFD simulations of turbulent dust dispersion in the 20 L vessel using OpenFOAM

Islas,

Fernández,

Betegón

et al. 2022

Preprint

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Dust explosions are among the most hazardous accidents affecting industrial facilities processing particulate solids. Describing the severity parameters of dust clouds is critical to the safety management and risk assessment of dust explosions. These parameters are determined experimentally in a 20L spherical vessel, following the ASTM E1226 or UNE 14034 standards. Since their reproducibility depends on the levels of turbulence associated with the dust cloud, a computational model of the multi-phase (gas-solid) flow is used to simulate the dispersion process with the open-source CFD code OpenFOAM. The model is successfully validated against experimental measurements from the literature and numerical results of a commercial CFD code. In addition, this study considers the impact of particle size on the turbulence of the carrier phase, suggesting that particles attenuate its turbulence intensity. Moreover, the model predicts well the formation of a two-vortex flow pattern, which has a negative impact on the distribution of the particle-laden flows with p ≤ 100 m, as most of the particles concentrate at the near-wall region. Contrarily, an improved homogeneity of dust cloud is observed for a case fed with larger particles ( p = 200 m), as the increased inertia of these particles allows them to enter into the re-circulation regions.

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Dust explosions: CFD modeling as a tool to characterize the relevant parameters of the dust dispersion

Cited by 58 publications

References 25 publications

CFD as an approach to understand flammable dust 20 L standard test: Effect of the ignition time on the fluid flow

CFD as an approach to understand flammable dust 20 L standard test: Effect of the ignition time on the fluid flow

Combining product engineering and inherent safety to improve the powder impregnation process

CFD simulations of turbulent dust dispersion in the 20 L vessel using OpenFOAM

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