EXTENSIONAL RHEOLOGY OF A TWO DIMENSIONAL FOAM

We report on changes in the packing structure and flow properties of a two dimensional bubble raft of slightly polydisperse bubbles. High resolution image video is used to track the collective motion of the bubbles as the foam is subject to an oscillatory extensional driving. The foam displays both elastic and plastic behavior under varying stress with sudden collective rearrangements occurring along slip lines separating semi-crystalline domains. Measurements of local bubble rearrangement show that the events are temporally correlated, but not spatially correlated.

Additional Abstract Information

Student(s): Nicholas Hagans

Department: Physics and Astronomy

Faculty Advisor: Dr. Klebert Feitosa

Type: Oral

Year: 2013