Effect of particle shape on bubble dynamics in bubbling fluidized bed
| Autor: | Zongyan Zhou, Siddhartha Shrestha |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Jet (fluid)
Materials science Physics QC1-999 Bubble Dynamics (mechanics) 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Physics::Fluid Dynamics 020401 chemical engineering Fluidized bed Bubble velocity Particle 0204 chemical engineering 0210 nano-technology Body orifice Bubbling fluidized bed |
| Zdroj: | EPJ Web of Conferences, Vol 249, p 06012 (2021) |
| ISSN: | 2100-014X |
| Popis: | Particle shape can significantly affect the bubble dynamics of bubbling fluidized beds (BFB). In this paper, findings obtained from simulations using CFD-DEM are summarized to discuss the effect of particle shape on bubble dynamics and bubble properties such as bubble size, shape and velocity at a single orifice and uniform fluidized bed. Particles with aspect ratios at 0.5 (oblate), 1 (spherical) and 2 (prolate) are employed to represent disc-like, spherical and rod-like particles, respectively. Both single jet and uniform fluidized bed simulations demonstrate that the bubble forming/rising regions, bubble coalescence locations, and bubble splitting phenomena are significantly influenced by particle shape. The CFD-DEM results for bubble size and bubble velocity show good agreement with literature correlations. |
| Databáze: | OpenAIRE |
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