*********************************
There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
*********************************
Josie Giles
School of Chemical & Biomolecular Engineering
(404) 385-2299
events@gatech.edu
Summary Sentence: No summary sentence submitted.
Full Summary: No summary paragraph submitted.
William B. RusselThe annual Ashton Cary Lecture series features distinguished scholars in fields of significance to chemical engineering. The visiting lecturers, in addition to presenting seminars on recent engineering advances, participate in informal discussions with Georgia Tech faculty and students.
The 27th Annual Ashton Cary Lecturer, Dr. William B. Russel, is the A.W. Marks ’19 Professor in the Department of Chemical Engineering and Dean of the Graduate School at Princeton University. He presents a technical lecture entitled Thin Colloidal Films: Skinning, Cracking, and Peeling as the 27th Annual Ashton Cary lecturer.
Thin Colloidal Films: Skinning, Cracking, and Peeling
Drying colloidal dispersions by evaporating the liquid to create particulate solids, porous coatings, or continuous films is common to a number of important technologies, ranging from applying latex paint and manufacturing photographic film to depositing highly porous coatings on ink jet papers and fabricating photonic crystals from silica sols. The objective is generally to create a layer of specified thickness and controlled porosity with permeability, strength, transparency, or other physical properties. Both the understanding and implementation of drying processes have advanced considerably in the past two decades. Yet processing still raises a number of interesting and difficult issues because of conflicting constraints and performance properties. The focus of this talk is the complex phenomena that emerge as evaporation drives fluid flow in the thin film. Rapid evaporation can segregate binary mixtures or create an impermeable skin at the surface. Slower evaporation produces a porous packing subject to a rising capillary pressure that deforms the particles. Elastic deformation can cause cracking and peeling, while a viscous response can produce a pore-free solid.
