School Seminars and Colloquia

Compound sessile drops and Jeffrey orbits

Applied Mathematics Student Seminar

by Michael Neeson and Nic Bertin

Institution: The University of Melbourne
Date: Tue 21st August 2012
Time: 1:00 PM
Location: Old Geology Theatre 2

Abstract: \textbf{\textit{Part 1.}} Compound drops arise from the contact of three immiscible fluids and can assume various geometric forms based on the interfacial chemistry of the phases involved. In this talk we present a new class of compound drops that is sessile on a solid surface. By minimising the total free energy of the system it is possible to observe very different configurations. I will discuss some of the key theoretical predictions and compare them to experimental observations.
\textbf{\textit{Part 2.}} The experiments we're conducting aim at understanding the behavior of macroscopic particles such as cylindrical rods and spheroids in a shear flow. They tend to move around orbits and rotate at frequencies predicted by G. B. Jeffery in 1922. The effect of shape and aspect ratio is investigated.