Abstract
This paper presents the first application of true three-dimensional electrical impedance tomography (EIT) to investigate fluid mixing under realistic spatial and temporal scales. State-of-the-art three-dimensional EIT has been applied to miscible liquid mixing in a semi-tech scale stirred tank. The work aims to demonstrate the performance of a three-dimensional reconstruction algorithm to monitor the mixing of a pulsed addition of a high conductivity tracer. A Rushton turbine has been investigated under a range of power inputs and feed locations using the ITS P2000 commercial EIT instrument. A conductometric technique has been developed that enables the measurement of the mixing time based on inferred EIT conductivity measurements. The three-dimensional EIT approach has been validated across the full range of experimental conditions using a video camera and dye tracer. Results indicate that three-dimensional EIT performs well for surface feeds, EIT mixing times compare well to literature correlations and flow visualization demonstrates the accuracy of the EIT images. However, some anomalies for feeds close to the impeller are discussed.
| Original language | English |
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| Publication status | Published - 14 Apr 2009 |
| Event | 13th European Conference on Mixing - London Duration: 14 Apr 2009 → 17 Apr 2009 http://proceedings.europeanmixing13.org/data/Stephenson_et_al.pdf |
Conference
| Conference | 13th European Conference on Mixing |
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| City | London |
| Period | 14/04/09 → 17/04/09 |
| Internet address |