Mixing in bubbling gas-fluidised beds comes primarily from bubble motion through the particulate phase and this has previously been studied experimentally by examining the displacement of a marked layer of particles by rising bubbles. The reported experimental profiles show considerable variation in
The stability of bubbles injected into particulate gas-fluidised beds
โ Scribed by S.P. Watkins; D.E. Creasy
- Book ID
- 118968719
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 435 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0032-5910
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๐ SIMILAR VOLUMES
Bubbles were provoked in a gas fluidised bed by injecting a pulse of air and were then observed by X-rays. For a given quiescent bed, the volume of bubble produced, VB by injecting a volume, Vi, was found to be described by, where A is a constant of proportionality. The initiating volume, Vi,, decre
## Shorter Communications characteristic time of the fluid Greek symbols natural time of the fluid radial, angular and axial component of the % velocity, respectively second invariant of the rate of deformation tensor
Based on the observed pattern of coalescence of bubble pairs in vertical alignment in a two-dimensional bed, a theory is developed which describes how bubble size and frequency changes with height in a gas fluidised bed. It is confirmed by comparison with the reported data from 10 separate investiga