BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Continuum modelling of particulate suspensions: clogging\, jamming
  and mobilisation. - Duncan Hewitt\, DAMTP
DTSTART:20260311T140000Z
DTEND:20260311T150000Z
UID:TALK243922@talks.cam.ac.uk
CONTACT:Anna Walczyk
DESCRIPTION:Wet granular and particulate suspensions can exhibit rich beha
 viour: in some limits they can flow like a Newtonian fluid\; in others the
 y can behave like a rigid porous solid\, through which the host fluid can 
 move. More generally\, their rheological behaviour is complex and difficul
 t to fully capture in a continuum description. Here we explore simplified 
 continuum models of suspensions that capture their ability to jam-up like 
 a viscoplastic material when the applied stress is too small. In particula
 r\, suspensions can clog and jam up in confined geometries: it is widely o
 bserved in industrial processing that geometric constrictions result in cl
 ogging\, for example\, while clogging caused by stiffening of deoxygenated
  red blood cells is a key signature of sickle cell disease. We consider a 
 two-phase continuum model of the particulate suspension to capture the key
  rheological behaviour of the suspension (based on ideas from granular fri
 ction and the so-called mu(J) model) and the differential seepage of fluid
  through the particulate phase (based on Darcy’s law). The crucial role 
 of the latter in modulating particle flux can lead to dramatic emergent cl
 ogging in a channel: this phenomenon and related flow behaviour will be ex
 plored and discussed. 
LOCATION:LT6
END:VEVENT
END:VCALENDAR