Special Physics Colloquium: Themes in Cmplex Fluids: From Thin Films to Electrokinetically Controlled Transport
Prof. Howard Stone, Princeton University, IAS Sackler Lecturer
Mortimer and Raymond Sackler Institute of Advanced Studies & The Center for the Physics and Chemistry of Living Systems
Lecture in the framework of a joint special colloquium of the School of Physics and Astronomy and of the School of Mechanical Engineering
Fluid dynamical phenomena occur from large scales important to Earth-relevant processes, e.g., climate and geophysical phenomena, to small scales, hundreds of microns and smaller, such as those that influence and transport cells, colloids, and polymers. In this talk, I will first give a glimpse at some (randomly selected), perhaps unexpected, fluid dynamical phenomena that my group has worked on. Then, I will focus on problems in colloid transport where electrokinetic effects dominate. In particular, diffusiophoretic transport refers to the relative motion of fluid and suspended particles due to a gradient of a chemical, where the transport rate is controlled by the diffusivity of the small ions. I will survey a few of our results in this area, including transport in porous media, the influence of multivalent ions, the role of a background electrolyte or pH, and effects that influence the dispersion of a cloud of colloids.
Event Organizer: Prof. Rennan Barkana (http://wise-obs.tau.ac.il/~barkana/colloq.html)