On Geldart Group A behaviour in fluidized beds with and without cohesive interparticle forces: A DEM study
✍ Scribed by Jai Kant Pandit; X.S. Wang; M.J. Rhodes
- Book ID
- 104088460
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 213 KB
- Volume
- 164
- Category
- Article
- ISSN
- 0032-5910
No coin nor oath required. For personal study only.
✦ Synopsis
This paper presents a 2D soft sphere discrete element method (DEM) simulation study of fluidization behaviour of Geldart Group A powders and Geldart Group B powders in the presence of externally imposed cohesive interparticle force. In the presence of externally imposed cohesive interparticle force, beds of Group B powders exhibit some of the characteristics of Group A powders (homogeneous bed expansion and pressure drop hysteresis), but show other characteristics (e.g. bed collapse) which are quite different. The homogeneous bed expansion for Group B particles with imposed cohesive interparticle force is found to follow the Richardson-Zaki relationship, with the exponent n being independent of the magnitude of interparticle force and with the degree of expansion increasing with the magnitude of interparticle force. Group A particles show homogeneous bed expansion even in the absence of cohesive interparticle force.