Article ID Journal Published Year Pages File Type
153068 Chemical Engineering Journal 2008 14 Pages PDF
Abstract

In this work, experimental and computational fluid dynamic studies have been carried out for hollow self-inducing three-phase stirred tank systems. The effect of different impeller designs (hollow self-inducing pitched blade down flow turbines of different blade angles (PBTD30, PBTD45, PBTD60), and self-inducing modified double disc (MDD) impeller) and operating conditions such as solid loading (0–7 wt. %) and solid particle size (125–700 μm) have been investigated on critical impeller speed for solid suspension (NCS), gas induction rate (QG) and overall gas hold-up (∈G). Computational fluid dynamics model based on the Eulerian multi-fluid approach has been employed along with the standard k-ɛ turbulence model. A multiple reference frame (MRF) approach was used to model the impeller rotation. In this study, the multiphase flow has been simulated using a commercial CFD code, Fluent v6.2.16. A good agreement was found between the CFD predictions and the experimental values of NCS.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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