Among the factors influencing dust explosion, particle size distribution (PSD) is both one of most important and complex to consider. For instance, it commonly accepted that explosion sensitivity increases when decreases. Such an assertion may be questionable for nano-objects which easily agglomerate. However, agglomerates can broken during dispersion process. Correlating parameters actual PSD ...

The Mine Safety and Health Administration (MSHA) specification for rock dust used in underground coal mines, as defined by 30 CFR 75.2, requires 70% of the material to pass through a 200 mesh sieve (<75 µm). However, in a collection of rock dusts, 47% were found to not meet the criteria. Upon further investigation, it was determined that some of the samples did meet the specification, but were ...

SN 2008S erupted in early 2008 in the grand design spiral galaxy NGC 6946. The progenitor was detected by Prieto et al. in Spitzer Space Telescope images taken over the four years prior to the explosion, but was not detected in deep optical images, from which they inferred a self-obscured object with a mass of about 10M . We obtained Spitzer observations of SN 2008S five days after its discover...

If electrical and non-electrical equipment used in underground mines susceptible to firedamp coal dust or other industries with explosion hazard is not proper selected for operating explosive atmospheres, they are likely generate an ignition of the atmosphere result events significant environmental material damages and, moreover, human victims. Therefore, it mandatory responsible persons reach ...

Many of the technological processes that take place in installations which cereal products are transported and / or stored, involve existence combustible dusts. These dusts may be suspended air, form accumulations layers deposits dust various thicknesses, lead to fires, explosions catalytic decomposition presence oxygen. If swirling air appropriate proportions an effective source ignition is pr...

The dust explosion prevention in mines and dusted industries has been an important issue for years. During this time, many experimental and theoretical investigations have been carried out. Nevertheless, up to now nobody can declare that all the mechanisms are clear and the comprehensive mathematical model is constructed taking into account all the details of this complicated process. The gas-d...

Large amounts of dust (> 108 M⊙) have recently been discovered in high redshifts quasars1,2 and galaxies3−5, corresponding to a time when the Universe was less than one-tenth of its present age. The stellar winds produced by stars in the late stages of their evolution (on the asymptotic giant branch of the Hertzsprung-Russell diagram) are though to be the main source of dust in galaxies, but th...

Abstract The paper considers the solution of model gas-dynamic problems (propagation plane sound wave, one-dimensional shock tube problem, three-dimensional problem a point explosion in continuous medium) case gas-dust medium. interaction dust and gas was taken into account using IDIC method within SPH used to solve equations. An important feature work is use open computational package OpenFPM,...

Dust explosions threaten the solids process industry. Parameters influencing dust include particle size, chemical composition, and polydispersity; however, morphology is often overlooked. Studies show impacts cloud minimum ignition energy (MIE) via heat transfer because higher specific surface results in lower conductive resistance. However, not only factor impacting MIE; effect of on dynamics ...