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SUMMARY:Criticality and non-reciprocity of catastrophic phase inversion in
  emulsions
DTSTART;VALUE=DATE-TIME:20260417T155000Z
DTEND;VALUE=DATE-TIME:20260417T161000Z
DTSTAMP;VALUE=DATE-TIME:20260412T072519Z
UID:indico-contribution-326@fisindico.uniandes.edu.co
DESCRIPTION:Speakers: Andrea Scagliarini (Institute for Applied Mathematic
 s (IAC)\, National Research Council (CNR))\nThe production of concentrated
  emulsions involves high-shear flows and it is well known that at a critic
 al volume fraction the emulsion loses stability\, undergoing an extremely 
 rapid process where the continuous and dispersed phases in the emulsion ex
 change roles. This process\, called catastrophic phase inversion\, which r
 esembles in several respects a dynamical phase transition\, has remained w
 idely elusive from an experimental and theoretical point of view. We prese
 nt state-of-the-art experimental and numerical data to support a dynamical
 -system framework capable of precisely highlighting the dynamics occurring
  in the system as it approaches the catastrophic phase inversion. The stud
 y clearly highlights that at high volume fractions\, dynamical changes in 
 the emulsion morphology\, due to coalescence and breakup of droplets\, pla
 y a critical role in determining the emulsion rheology and stability. Addi
 tionally\, we show that at approaching the critical volume fraction\, the 
 dynamics can be simplified as being controlled by the dynamics of a correl
 ation length represented\, in our systems\, by the size of the largest dro
 plet. This dynamics shares a close connection with non-reciprocal phase tr
 ansition where two different physical mechanisms\, coalescence and breakup
 s\, can get out of balance leading to large non-symmetric periodic excursi
 ons in phase space. We clarify the phenomenology observed and quantitative
 ly explain the essential aspect of the highly complex dynamics of stabiliz
 ed emulsions undergoing catastrophic phase inversion.\n\nhttps://fisindico
 .uniandes.edu.co/event/23/contributions/326/
LOCATION:
URL:https://fisindico.uniandes.edu.co/event/23/contributions/326/
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