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DTSTART:20250330T030000
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DTSTAMP:20260424T114301Z
UID:6827042636c64906054830@ist.ac.at
DTSTART:20251023T110000
DTEND:20251023T120000
DESCRIPTION:Speaker: Dan Daniel\nhosted by Scott Waitukaitis\nAbstract: Whe
 n a drop evaporates\, it is easy to think of it as a purely thermal and ma
 ss-transfer process. In reality\, subtle electrohydrodynamic phenomena can
  transform its quiet demise into a highly charged and sometimes violent ev
 ent. In this talk\, I will explore how sessile water drops spontaneously a
 cquire and redistribute electrical charge during evaporation\, leaving beh
 ind intricate bipolar surface charge patterns [1]. Under certain condition
 ssuch as when contact-line pinning is eliminatedthe shrinking drop can acc
 umulate enough charge to approach its electrostatic stability limit. At th
 is point\, electrostatic repulsion overwhelms surface tension\, triggering
  Coulombic explosions and fine spray ejection [2\, 3]. These findings reve
 al evaporation as a rich playground for soft matter physics\, where therma
 l\, hydrodynamic\, and electrostatic forces converge to produce surprising
  dynamics.[1] N. Singh\, A.D. Ratschow\, N. Aslam\, D. Daniel\, Bipolar su
 rface charging by evaporating water droplets\, https://arxiv.org/abs/2508.
 08884[2] M. Lin\, P. Zhang\, D. Daniel\, Exploding droplets on lubricated 
 surfaces\, https://doi.org/10.21203/rs.3.rs-4486603/v1[3] https://www.yout
 ube.com/watch?v=F0F8P23DUo0
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Dan Daniel: An Electrifying Farewell: How Evaporating Drops Charge 
 and Explode
URL:https://talks-calendar.ista.ac.at/events/5955
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