Cavern Mixing Size ISMIP VI
20/10/2008
A number of papers detailing the use of the ITS p2000 ERT system were presented at the recent International Symposium on Mixing in Industrial Processes 6 at Niagara Falls, Ontario, Canada, 17-21 August 2008. All papers focused on the topic of caverns.
Dr. Farhad Ein-Mozaffari from Ryerson University, Toronto, Canada investigated the shape and size of the cavern formation in mixing a non-Newtonian fluid using ERT.
Professor Chad P.J. Bennington from the University of British Columbia, Vancouver, Canada presented a paper on the analysis of the cavern size formed by an opaque pulp fibre suspension. The rapid measurements and the non-invasive character of the ERT technique were among the most important features for this study. Due to the newness of the ERT technique, work is currently under way to compare the experimental data versus the model predictions.
Dr Mark Simmons from the University of Birmingham reported on work performed with Johnson Matthey Catalysts in which ERT was used to visualise cavern formation in opaque industrial mixing systems. The results were validated using Positron Emission Projection Imaging (PEPI) at lab scale. The figures below show the comparison of cavern size obtained from visualisation (blue), PEPI (green) and ERT (red). This provided the confidence to use ERT in the field and successful trials have been conducted with linear ERT probes and the p2000 supplied by ITS on production plants.
The figures show the comparison of cavern size obtained from
visualisation (blue), PEPI (green) and ERT (red).
Acknowledgements:
“Analysis of Cavern Formation in Mixing Yield Stress Fluids using Tomography and CFD Modelling”
Dr. Farhad Ein-Mozaffari Ryerson University
“Cavern Formation in Agitated Pulp Suspension Stock Chests using Side-Entering Impellers”
Professor Chad P.J. Bennington University of British Columbia
“Techniques For Visualisation of Cavern Boundaries in Opaque Industrial Mixing Systems”
Dr Mark Simmons University of Birmingham/Johnson Matthey Technology Centre
For more information please visit:
www.itoms.com/mixing
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