An approximate consideration on the mechanism of gravity flow of particles through an aperture of a storage vessel on the basis of a block-flow model

✍ Scribed by K. Shinohara; T. Tanaka

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 869 KB
• Volume: 29
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(74)85017-7

✦ Synopsis

model is proposed for the gravity flow of particles that is particulariy applicable to cohesive powders. The flow criterion is first estimated by describing the distribution of solids pressure within a vessel and by calculating the 'flowability' of a cylindrical biock above the aperture. A flow rate equation is derived from a dynamic force balance on the black which gives an acceleration and a velocity profile in the discharging black. The seemingly steady flow is in fact a rapidly fluctuating one as the loading switches from one state to another. Computed results from the model explain several wel1 known phenomena in particle discharge from hoppers and the method described gives a clear basis for design.