However, there are few reports concerning flame propagation and dust particle movement of a large-scale dust explosion process in open space.
The observational data indicate that large-scale dust plume ejected by the impact contained a large mass of ∼106 kg of solid dust grains and formed two wings approximately ±45 degrees from the symmetric center (Sugita et al., 2005).
The data reported in this study will enable improved cyclone designs for large-scale dust collection, and also highlight the need for improved numerical techniques to accurately simulate the time characteristics of particles and flow in a cyclone.
The role of residual large-eddy turbulence, as well as the frozen-turbulence effect leading to large-scale dust concentration fluctuations that cause flame folding, are discussed as two possible sources for the greater flame speed.
This would affect both station winds locally and the greater Sahel area, consistent with large-scale dust trends found in satellite data [ Evan and Mukhopadhyay, 2010; Foltz and McPhaden, 2008].
This view seems to be confirmed by some results from a series of large scale vented dust explosion experiments in a 500 m3 silo conducted in Norway by CMI, (now GexCon AS) during 1980 1982.
We also summarize the results obtained regarding the shape of the dust emission spectrum in the sub-millimeter and millimeter spectral range and the first large scale detection of polarized dust emission in our Galaxy.
Emissions from the developing world and large scale events such as dust storms and wildfires affect visibility around much of the globe.
And, Armitage says, astronomers will now want to know "whether large scale structures in the dust, such as the one imaged for IRS 48, are the norm in protoplanetary disks".
We present here hydrodynamic simulations of structure formation implementing the effect of the cooling by dust on large scale structure formation.
This may prevent thousands of bees being killed by a spray or drifting dust, as happened in the large scale bee poisoning in Germany's Rhine valley in 2008.
