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Several sequential packing models are applied to numerically construct packed beds of identical spheres in right circular cylindrical containers. The fixed packed beds are assembled on a base layer so that a newly added sphere is always placed at a vertical location that is stable under gravity. The newly added sphere may be positioned so that it is in contact with two spheres and the container wall...
Pneumatic slug conveying in a horizontal straight pipeline is analyzed numerically. The gas flow is calculated by the method of characteristics, divided into three regions: 1, particle slugs; 2, particle free layers; and 3, particle settled layers. It is assumed that: (1) the shear stress on the surface of the settled layer is within a saltation limit; (2) the pressure drop through the particles...
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