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SUMMARY:The ejected material from the impact of a gel drop on a deep gel p
 ool - Georgia Ioannou (DAMTP)
DTSTART:20230519T120000Z
DTEND:20230519T130000Z
UID:TALK199114@talks.cam.ac.uk
CONTACT:108503
DESCRIPTION:Impact cratering experiments are performed using a Carbopol ge
 l drop as the impactor and a deep Carbopol gel pool as the target. The eje
 cta curtain that arises upon impact grows in height and diameter with time
  until it finally collapses and gets deposited on the pool surface. A qual
 itative study of the instabilities that arise at the rim of the ejecta cur
 tain will lead to the categorisation of the ejecta shape into 5 regimes ac
 cording to a single dimensionless parameter that combines the inertial str
 ess\, the viscous stress and the yield stress. A detailed study of the eje
 cta sheet dimensions and the angle with the horizontal will show that the 
 dynamics of this yield-stress fluid ejecta differ from those of water or g
 ranular ejecta.
LOCATION:MR14\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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