Characteristics of erupting bubbles in a three dimensional fluidized bed
Measurements were made of the bubbling processes at the free surface of a three dimensional fluidized bed to determine the effects of operating conditions on the characteristics of the erupting bubbles; and calculations were carried out to determine the magnitude of the bubble through-flow coefficient and effective area of flow. The results show that the bubble through-flow coefficient is much larger than is predicted by classical bubble models, ranging from two to eight for glass particles and fourteen to nineteen for puffed millet bed material. The percentage of coalescing bubbles increased with superficial gas velocity to values approaching 25 percent. Horizontal coalescence between bubbles was found to have a negligible effect on the height to which the bulge and wake materials are ejected during an eruption process.
- Research Organization:
- Lehigh Univ., Bethlehem, PA
- OSTI ID:
- 6483049
- Journal Information:
- AIChE Symp. Ser.; (United States), Journal Name: AIChE Symp. Ser.; (United States) Vol. 80:241; ISSN ACSSC
- Country of Publication:
- United States
- Language:
- English
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