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SUMMARY:Formation\, Breakup and Coalescence of Droplets - Dr Rafael Castre
 jon-Pita\, QMUL
DTSTART:20160505T103000Z
DTEND:20160505T113000Z
UID:TALK65175@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:From rain drops landing on the ocean to inkjet printing\, drop
  formation and impact are ubiquitous processes in both nature and industry
 . It is generally accepted that there is still much to understand about dr
 op breakup and splashing and these topics have gained additional importanc
 e motivated by the enormous potential of inkjet\, spray and coating techno
 logies in 3D printing. In fact\, most methods aiming to model and predict 
 droplet behaviour are either inaccurate or unsuitable for industrial appli
 cations. Furthermore\, theoretical models are extremely hard to validate\,
  and therefore as a consequence industry relies on empirical trial and err
 or testing when developing and optimizing droplet technologies. \n\nIn thi
 s talk I will give an overview of my studies that are aiming to bridge the
  existing gaps between applied and theoretical sciences\, and also to an e
 xtent\, those existing between academic and industrial work in the area of
  droplet science. The talk will focus on comparisons between experimental 
 data and models and will highlight some interesting phenomena that have be
 en shown recently to be arising in these topics. The first part of the tal
 k will concentrate on the study of the breakup of liquid filaments and dro
 p formation. My results will show that whether a thin filament has a tende
 ncy to break up or not into droplets will be dependent only on the liquid 
 properties and the geometry of the system\, and that this behaviour is uni
 versal. The second part of the talk will focus on the impact\, coalescence
 \, mixing and splashing of droplets. While the impact of droplets on to se
 ssile solid substrates has been successfully studied in recent years\, the
  impact on moving liquids has remained vastly unexplored due to practical 
 difficulties. My talk will present the experimental arrangements that will
  overcome such limitations and will also investigate the impact of droplet
 s on to diverse substrates including moving pools of the same liquid. My r
 esults will report the existence of distinct regimes of behaviour that are
  determined only by the initial dynamic conditions and the properties of t
 he fluid.  The third\, and last part of my presentation\, will conclude wi
 th some suggested directions for future work.\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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