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Gas-liquid flow generated by a pitched blade turbine : PIV measurements and CFD simulations

Khopkar, Avinash R. and Aubin, Joelle and Xuereb, Catherine and Le Sauze, Nathalie and Bertrand, Joël and Ranade, Vivek V. Gas-liquid flow generated by a pitched blade turbine : PIV measurements and CFD simulations. (2003) Industrial & Engineering Chemistry Research, vol. 4 (n° 21). pp. 5318-5332.

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Official URL: http://dx.doi.org/10.1021/ie020954t

Abstract

Axial flow impellers, like pitched blade impellers, are being increasingly used for gas-liquid systems in stirred vessels. In this work we have used particle image velocimetry (PIV) and computational fluid dynamics (CFD) models to investigate gas-liquid flow generated by a down-flow pitched blade turbine. PIV measurements were carried out in a fully baffled stirred vessel (of 0.19 m diameter) with a dished bottom. Angle resolved measurements of the flow field with and without gas dispersion were carried out. An attempt was made to capture key details of the trailing vortex, the accumulation of gas and the flow around the impeller blades. A two-fluid model along with the standard k-e turbulence model was used to simulate dispersed gas-liquid flow in stirred vessel. The computational snapshot approach was used to simulate impeller rotation and was implemented in the commercial CFD code, FLUENT4.5 (of Fluent. Inc., USA). The model predictions were verified by comparison with the PIV measurements and other available experimental data. The computational model and results discussed in this work are useful for better understanding and simulating of gas-liquid flow generated by axial impellers in stirred vessels.

Item Type:Article
Additional Information:This publication is availalble on http://pubs.acs.org/toc/iecred/current
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > National Chemical Laboratory - NCL (INDIA)
Laboratory name:
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Deposited By: Joelle Aubin-cano

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