For more information about this meeting, contact Andrew Belmonte, Hope Shaffer.
|Title:||From Bouncing to Splashing: Impact of Rigid Spheres and Liquid Droplets on Elastic Membranes|
|Seminar:||The Pritchard Lab Seminar|
|Speaker:||Laurent Courbin, School of Engineering & Applied Sciences, Harvard University|
|Fluid motion can be drastically influenced by the nature of boundaries. Here, we explore problems where the elasticity of a substrate affects the dynamical response of fluid or fluid-like systems. We report the impact and subsequent bouncing of rigid spheres on stretched thin polymeric films. We rationalize our observations using scaling arguments. This allows us to present a diagram mapping different possible impact dynamics for elastic membrane systems. We extend these results to the study of the splashing behavior observed when a liquid droplet is released on a membrane. Splashing can be tuned and eventually suppressed by reducing the tension in the membrane. We provide a model for the tension dependence of this threshold based on a comparison between the fluid pressure upon impact and the elastic stress in the membrane.|
Room Reservation Information
|Date:||11 / 03 / 2008|
|Time:||02:30pm - 03:30pm|