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SUMMARY:Particle-Laden Flows in Rotating Drums: The Silent Secrets - Prof.
  Peter Thomas\, Fluid Dynamics Research Centre\, School of Engineering\, U
 niversity of Warwick
DTSTART:20150211T140000Z
DTEND:20150211T150000Z
UID:TALK57163@talks.cam.ac.uk
CONTACT:Vanessa Blake
DESCRIPTION:An overview of our experimental programme investigating partic
 le-laden rimming flows is presented. Rimming flow is the flow established 
 in a partially fluid-filled cylinder when it rotates about a horizontal ax
 is. Rimming flow of homogeneous liquids has been studied since the late 19
 30s - originally due to its relevance to the pulp and paper industry. We s
 tarted investigating how the dynamics of rimming flow are affected when th
 e liquid becomes contaminated by successively increasing amounts of small\
 , solid particles. In this context we discovered a new particle-segregatio
 n phenomenon that is accompanied by the formation of various spatial and s
 patiotemporal patterns. Long-term observations of the system\, lasting up 
 to about 5 weeks\, have revealed the existence of very complex\, but often
  highly symmetric\, spatiotemporal pattern dynamics. In order to begin to 
 understand the pattern formation processes and their associated dynamics w
 e have very recently begun to investigate the flow by means of the Positro
 n Emission Particle Tracking (PEPT). This technique enables probing the mo
 tion of a single radioactively tagged particle among thousands of other dy
 namically similar particles.\n
LOCATION:Lecture Theatre 1\, Department of Chemical Engineering  and Biote
 chnology\, New Museums Site
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