Events
Vortex Tracking and Mixing Enhancement in Stirred Processes
| Date: | Wednesday 27 February 2008 16:00 - 17:00 |
| Location: | UPC |
Professor Michael Yianneskis
CEng CSci FRSA FIMechE FIChemE FKC
Professor of Fluid Mechanics and
Head of the School of Physical Sciences and Engineering, King's College London
The precession of macroinstability (MI) vortices in stirred vessels is investigated with vortex tracking methodologies, and utilized to enhance mixing performance.
The techniques were employed to determine the instantaneous and average location, size and vorticity of the MI vortex for a range of impeller Reynolds numbers in two vessels of different size (80 and 290 mm diameter) stirred by a Rushton impeller.
Measurements of
mixing time are performed in a 588 mm dia. vessel with surface insertion of a passive scalar tracer either inside or outside the precessing MI vortex. The data indicate that in-vortex insertion can result in a mixing time or power consumption reduction of 20%, and even possibly 30%.
