Journal ArticleDOI
Experimental study of transverse bed motion in rotary kilns
TLDR
In this article, the effect of variables such as rotational speed, bed depth, cylinder diameter, particle size, and particle shape on bed motion has been determined, and the scaling of bed behavior with respect to particle size and cylinder diameter requires similarity of Froude number modified by(D/d p)1/2, and pct fill.Abstract:
Slumping and rolling beds have been studied extensively in a continuous pilot kiln and batch rotary cylinders. Solids investigated include nickel oxide pellets, limestone, sand, and gravel. The effect of variables such as rotational speed, bed depth, cylinder diameter, particle size, and particle shape on bed motion has been determined. For a given material, the different modes of bed motion can be delineated conveniently on a Bed Behavior Diagram which is a plot of bed depthvs rotational speed. The scaling of bed behavior with respect to particle size and cylinder diameter requires similarity of Froude number modified by(D/d
p)1/2, and pct fill. Measurements of key variables characterizing slumping and rolling beds have also been made.read more
Citations
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Discrete particle simulation of particulate systems: A review of major applications and findings
TL;DR: Zhu et al. as discussed by the authors provided a summary of the studies based on discrete particle simulation in the past two decades or so, with emphasis on the microdynamics including packing/flow structure and particle-particle, particle-fluid and particle wall interaction forces.
Journal ArticleDOI
Mixing and Segregation of Granular Materials
TL;DR: In this article, the authors present a body of knowledge that forms the beginnings of an expandable continuum framework for the description of mixing and segregation of granular materials, focusing primarily on noncohesive particles, possibly differing in size, density, shape, etc.
Journal ArticleDOI
The transverse motion of solids in rotating cylinders—forms of motion and transition behavior
TL;DR: In this paper, a mathematical model was developed to predict the transitions between different forms of transverse motion of free-flowing bed materials in rotating cylinders: sliding, surging, slumping and cascading.
Journal ArticleDOI
Non-invasive measurements of granular flows by magnetic resonance imaging
TL;DR: In this paper, magnetic resonance imaging (MRI) was used to measure granular-flow in a partially filled, steadily rotating, long, horizontal cylinder and the density variation of the flowing layer where particles collide and dilate, and the depth of flowing layer and the flow velocity profile were obtained as a function of the cylinder rotation rate.
Journal ArticleDOI
Positron emission particle tracking studies of spherical particle motion in rotating drums
TL;DR: The axial dispersion coefficient was determined for each run and was found to be proportional to the frequency at which particles circulate around the bed, and to be strongly dependent on particle size but independent of drum diameter as discussed by the authors.
References
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Book
Particle Size Measurement
TL;DR: In this paper, the authors proposed a method of particle size distribution determination based on the Coulter principle, which is the alternative derivation of Kozeny's equation using equivalent capillaries.