UniSa - IRIS Institutional Research Information System

Aerated flow of fine cohesive powders in a Peschl shear cell

In the industrial practice aeration is commonly used to improve the quality of powder discharge from silos. However, the mutual interaction between shearing and aeration is not fully understood especially in the case of fine and cohesive powders. If fluidized these powders show particle aggregation, cracks and channels. Experimental results obtained with an aerated shear cell technique are presented. These results are discussed and suggest that the powder shear in forms of aggregate which aff...

Effect of system pressure on char combustion in Fluidized Beds. Model predictions

Although Pressurized Fluidized Bed Combustion is already at the demonstration stage, fundamental studies on the effect of system pressure on the many aspects of the process are still under way. In this paper the effect of system pressure on fluidized bed char combustion is considered from a theoretical standpoint. Char combustion in bubbling fluidized bed is controlled by the oxygen transfer from bubbles to emulsion phase and from this latter to char particle surface, oxygen diffusion in the ...

Seismic design-assisted-by-testing approach for racks with dissipative baseplates in the cross-aisle direction

A design-assisted-by-testing strategy is proposed for the upright frames of adjustable pallet racks. This methodology defines a procedure that aims to locate marked post-elastic behavior at the floor-to-upright connections of lateral resisting frames in the cross-aisle direction. Such connections are intended to enhance the performance of the cross-aisle frames when subjected to dynamic forces in their plane. The chosen baseplate connection is experimentally tested using monotonic and cyclic ...

Il Foreign Office e i missionari britannici in Cina (1922-1933)