- Title
- Prediction of regime transition in three-phase sparged reactors using linear stability analysis
- Creator
- Ghatage, Swapnil V.; Bhole, Manish R.; Padhiyar, Nitin; Joshi, Jyeshtaraj B.; Evans, Geoffrey M.
- Relation
- Chemical Engineering Journal Vol. 235, p. 307-330
- Publisher Link
- http://dx.doi.org/10.1016/j.cej.2013.08.095
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2014
- Description
- The estimation of critical gas holdup at which the transition from homogeneous regime to heterogeneous regime occurs is crucial for the design and scale-up of multiphase reactors. A number of experimental and empirical studies are published in the literature, however, there exists a lack of modeling studies which can satisfactorily predict the flow regime transition in three-phase sparged reactors. In the present work, the theory of linear stability analysis has been extended to investigate the hydrodynamic stability of three-phase sparged reactors (slurry bubble columns and three-phase fluidization). A mathematical model has been developed for the prediction of regime transition over a wide range of bubble size (0.7–20 × 10−3 m) and terminal rise velocity (80–340 × 10−3 m/s), particle settling velocity (1–1000 × 10−3 m/s), particle concentration (0.0007–30 vol%) and slurry density (800–5000 kg/m3). It was observed that the developed model predicts the transition gas holdup within an absolute deviation of 12% for three-phase sparged reactors. It was also observed that the developed generalized stability criterion predicts the regime transition in two-phase systems satisfactorily when applied to bubble columns.
- Subject
- bubble column; slurry bubble column; three-phase fluidization; flow regime transition; linear stabilty analysis
- Identifier
- http://hdl.handle.net/1959.13/1301119
- Identifier
- uon:20228
- Identifier
- ISSN:1385-8947
- Language
- eng
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