Physics Department Colloquia |
Events During the Week of October 19th through October 26th, 2008
Monday, October 20th, 2008
- No events scheduled
Tuesday, October 21st, 2008
- No events scheduled
Wednesday, October 22nd, 2008
- No events scheduled
Thursday, October 23rd, 2008
- No events scheduled
Friday, October 24th, 2008
- Impact!
- Time: 4:00 pm
- Place: 2241 Chamberlin Hall (coffee and cookies at 3:30 pm)
- Speaker: Sid Nagel, University of Chicago
- Abstract: When a liquid drop or a fluid stream hits a solid target it catastrophically deforms its shape in ways that can strongly violate our intuition. I will discuss two examples that raise issues about how a liquid interacts with itself and with its surroundings upon impact. The first experiment concerns an ordinary drop hitting a smooth dry surface. In this case the drop can create a splash in which a corona forms and breaks up into many small droplets. The second experiment deals with a granular stream hitting a target. In this situation, the material acts like a liquid with zero surface tension and has implications for how scattering takes place even at the submicroscopic level in studies of the quark-gluon plasma. A comparison of the granular jet with the heavy ion collisions raises questions about what it means to be a liquid.
- Host: Coppersmith