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SUMMARY:Under pressure: The physics behind the perfect espresso
DTSTART:20261013T090000Z
DTEND:20261013T100000Z
DTSTAMP:20261104T143200Z
UID:indico-event-1676@indico.ifj.edu.pl
DESCRIPTION:Speakers: Maciej Lisicki (Institute of Theoretical Physics\, F
 aculty of Physics\, University of Warsaw)\n\nThe sensory richness of coffe
 e is widely recognized and arises from the complex chemistry and immersion
  in cultural practices of coffee preparation. In contrast\, the physical c
 omplexity of espresso has received relatively less attention. The multipha
 se reactive flow through a dissolving\, elastic porous medium remains chal
 lenging to describe. Using a controlled experimental setup based on a caf
 é-grade espresso machine\, we demonstrate that the interplay between elas
 ticity and porosity governs the long-time flow rate during espresso extrac
 tion and\, consequently\, the concentration of solubles in the final bever
 age. We propose a minimal model that captures the resulting non-linear pre
 ssure-flow relationship and develop a methodology capable of reproducing t
 he time-dependent behavior of the espresso brewing process. Finally\, we s
 how that dissolution dynamics play a central role in determining the tempo
 ral evolution of flow during extraction.\n\nhttps://indico.ifj.edu.pl/even
 t/1676/
LOCATION:room 4003\, "skyscraper" ground floor (IFJ PAN\, hybrid)
URL:https://indico.ifj.edu.pl/event/1676/
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