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- Title
Operating Regimes and Hydrodynamics of a Rotating-Disc Contactor.
- Authors
Chen, Hang; Sun, Ze; Song, Xingfu; Yu, Jianguo
- Abstract
The operating regimes for a pilot-scale rotating-disc contactor (RDC) were investigated by a computational fluid dynamics/population balance model (CFD-PBM) simulation. The model successfully predicted the critical rotor speed, which divided the entire operating range into two regions. In the low rotor speed region, the input energy was insufficient to break droplets, resulting in an almost constant droplet diameter. Therefore, the increasing revolution slightly affected the interfacial area, while the axial mixing became severe. In contrast, the interfacial area increased significantly in the high rotor speed region because of the increased breakage rate. Moreover, the axial mixing extent increased slightly because the dispersed-phase accumulation enhanced the advection effect. The results indicate that the CFD-PBM approach can be applied to engineering practice for extractors.
- Subjects
CONTACTOR control systems; HYDRODYNAMICS; ROTATING discs (Engineering); COMPUTATIONAL fluid dynamics; LIQUID-liquid extraction; BOUNDARY value problems; ROTOR dynamics
- Publication
Chemical Engineering & Technology, 2017, Vol 40, Issue 3, p498
- ISSN
0930-7516
- Publication type
Article
- DOI
10.1002/ceat.201500295