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SUMMARY:Contr. Talk 4 - Linking transient shear profiles to the microscopi
 c structure and dynamics in concentrated colloidal suspensions
DTSTART;VALUE=DATE-TIME:20181210T160000Z
DTEND;VALUE=DATE-TIME:20181210T162000Z
DTSTAMP;VALUE=DATE-TIME:20260523T113153Z
UID:indico-contribution-502@lindico453.srv.lu.se
DESCRIPTION:Speakers: Andreas Pamvouxoglou (Heinrich Heine University Duss
 eldorf)\nWe performed start-up experiments with concentrated hard-sphere s
 uspensions around the glass transition. Rheo-confocal experiments were car
 ried out to link the macroscopic rheological response to the single-partic
 le structure and dynamics. During the start-up of shear\, suspensions of l
 arge particles (diameter ≈1.6μm) showed a transient non-linear velocity
 \, resembling shear bands without a clear boundary. We performed a quantit
 ative analysis to elucidate the correlation between the shear profile and 
 microscopic properties\, such as the local velocity\, shear rate and volum
 e fraction. They show a strong dependence on the position in the gap and h
 ence indicate a significant heterogeneity. Based on the microscopic proper
 ties we propose a mechanism that leads to the transient non-linear shear p
 rofiles.\n\nhttps://lindico453.srv.lu.se/event/67/contributions/502/
LOCATION:Elite Hotel Ideon Tera
URL:https://lindico453.srv.lu.se/event/67/contributions/502/
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